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Linux Supporting G5 Liquid Cooling System

Sandor writes "Apple's G5 is selling well and this seems to have helped the development of the Linux kernel on the ppc64 platform: shortly after the shipment of the dual G5 with the new liquid cooling system, it seems that Linux kernel is going to support it really soon."

109 comments

  1. Ah hah! by avalys · · Score: 5, Funny

    So, this would be perfect for those moments when you're on a Mac and need access to a Unix system for some reason.

    Oh, wait...

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    This space intentionally left blank.
  2. Sweet by Erect+Horsecock · · Score: 1, Insightful

    As soon as my dual 2.5 gets here I had planned to throw linux on it as well, but I didn't know about this problem. Might wait a few more days then...

    Is anybody booting their dual 2.5 with linux RIGHT NOW thats having a problem with this? Is it a show stopper or just more of an annoyance thing.

    --
    I hope you die painfully and alone.
    1. Re:Sweet by Anonymous Coward · · Score: 3, Informative

      I've had MANY problems running linux (be it Gentoo, Debian, or YDL 3.0.1... I've tried pretty much anything with a PPC or PPC64 port) on either the Dual 1.8 or the Dual 2.0 in the newer generations of G5s. I can't recall ever having gotten one to successfully boot from any ISO available online.

      If YDL 4 is able to boot and install successfully, I'll happily go out and purchase a boxed set; I just want to test it first. Too bad it won't be 'released' for a bit :-\ I'm very anxious to get it working.

    2. Re:Sweet by Monster+Zero · · Score: 5, Informative
      I know that this is tangential to the upstream posts about problems with Linux on the Apple G5s, but I wanted to at least add the following:

      My automated installs of SuSE Enterprise Linux 9.0 on the dual PowerPC 970 (G5) IBM JS20 Blades work very very well. One of my peers installed several from the CD media without incident as well (except the boot partion has to be of type PrEP) while I was working on setting up the infrastructure for the auto installs.

      If you can get the academic discount and happen to have IBM PowerPC970 equipment, I highly recommend SuSE SLES9.

    3. Re:Sweet by LiENUS · · Score: 2, Informative

      The article makes it seem like its an issue with the fans, it also appears that the patch will be submitted to linus within a few days so i would expect it in 2.6.10.

    4. Re:Sweet by Anonymous Coward · · Score: 0
    5. Re:Sweet by rmull · · Score: 1

      Now I will cry.
      *sob*

      --
      See you, space cowboy...
    6. Re:Sweet by boobert · · Score: 1

      I don't know with a username like that I think I would avoid links in their signature.

      Just a thought.

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      Your ad here ask me how!
    7. Re:Sweet by WhatAmIDoingHere · · Score: 1

      I browse /. without looking at user names, I remember people by their sigs.

      --
      Not a Twitter sockpuppet... but I wish I was.
    8. Re:Sweet by Anonymous Coward · · Score: 1, Informative

      Well, of course. Linux is the primary OS for the IBM blades.

      FWIW, "G5" is an Apple-ism. In IBM-land it refers to mainframes, not PowerPC chips.

    9. Re:Sweet by Anonymous Coward · · Score: 0

      I installed Gentoo on my dual 2.5 using the 2004.3 ppc64 iso available at http://dev.gentoo.org/~tgall/ . Runs great, fan control works, no kernel related problems. The kernel on the CD is vanilla 2.6.9 plus benh's pmac7,3 thermal patch.

  3. Which Distro? by Anonymous Coward · · Score: 0

    Remember folks, if you want to keep your warranty, you need Yellow Dog Linux. That's the only Linux distro you can install that won't void your warranty, since these guys are official Apple resellers. If your warranty expired, I hear Debian has a great Powerpc port.

  4. The point by MacFury · · Score: 3, Insightful

    Not to troll...but what is the point of running Linux on the Mac, aside from the "because we can!" which is a valid reason. :-)

    1. Re:The point by Zachary+Kessin · · Score: 3, Insightful

      I've wondered that as well. I have 3 computers on my desk, 2 run Mac OS 10.3, and the 3rd runs linux. I access the linux via VNC from one or the other of the macs. The thing is that there are a number of apps on the mac that are just better than anything else out there, at least as far as some of the things I want to do. I have never found linux apps that are as good as iTunes or iPhoto.

      --
      Erlang Developer and podcaster
    2. Re:The point by Anonymous Coward · · Score: 3, Interesting
      Cross platform compatibility. If you have an application for which you have the source code, it's advantageous to be able to run the OS on an arbitrary hardware platform. Whether that hardware be Alpha, MIPS, Sparc, POWER, PowerPC, x86, 6502, or whatever, if the OS will run on it, it's a relatively minor thing to take the source code and recompile (assuming it doesn't have endian problems or embedded assembly).

      This means that if you can get better bang for your buck out of PowerPC (aka Xserve RAID) hardware, you'll buy Xserves, throw the OS onto it, and start plugging away with your app. Next week, the best bang for buck might be Alpha -- so you buy the relevant systems from HP, throw the OS onto them, and start plugging away. The following week, it might be x86.

      Yes, in theory, any POSIX platform should be sufficiently compatible to do the job. In practice, however, POSIX compliance isn't enough.

      If you want OS X, it's there. If, however, your app is written for Linux (and it's the only app you want to run, or the others are all written for Linux) -- why bother modifying it so it'll work on OS X if it'll work with just a recompile on the PowerPC Linux ports?

      If you don't believe that the Unix market is so divergent, then I dare you: try downloading and compiling all the sources, from scratch, for some major package -- maybe KDE -- on Solaris. Or Tru64. Or HP-UX. Or AIX. It might work on Linux, but you'll have a royal pain of a time trying to get it to work elsewhere, unless it's been carefully written to not use Linux-isms. Believe me, I've been there, and it's not pretty.

    3. Re:The point by irc.goatse.cx+troll · · Score: 1

      How much does an OS X license cost?

      --
      Pain lasts, kid. Its how you know you're alive. Sometimes I think this growing up thing is just pain management-TheMaxx
    4. Re:The point by fsterman · · Score: 3, Insightful

      Because I need to install Linux on an original All-In-One G3 (_right_ before the iMac, educational release only) for a server :) Can't do with OS X! Custom apps for Linux, especially Linux kernal extensions. PPC is a pretty powerful processor, clustering it with Linux is easier and less expensive than OS X. Uhh, and more :)

      --
      Is there anything better than clicking through Microsoft ads on Slashdot?
    5. Re:The point by Anonymous Coward · · Score: 0

      If you're buying a new Mac, it's free. Or bundled with the hardware, whichever way you want to look at it (and there's no way to un-bundle it.)

    6. Re:The point by Bastian · · Score: 1

      I'm no expert on Linux PPC, but it seems like your example is moot.

      Last I checked, the Linux PPC kernel doesn't even support FireWire, so I would be very surprised if it supports the fibre channel bus you need to talk to an XServe RAID. And if you take the (admittedly very inexpensive) XServe RAID out of the equation, XServe hardware doesn't seem so cheap anymore.

    7. Re:The point by Anonymous Coward · · Score: 0

      Argh. Kill me now. I meant "xserve", not "xserve RAID". Sorry; we're in the middle of a project that's going to be using Xserve RAIDs for the hard disk space, and my finger macros must have kicked in.

    8. Re:The point by Bastian · · Score: 2, Funny

      Nice.

      Make sure you mount all of them in a single tall rack, and put it somewhere conspicuous in your office. Then, when December rolls around you can stick a star on top, turn down the lights, and use it as your office Allegedly-But-Not-Really-Nondenominational-Midwint er-Holiday Tree.

    9. Re:The point by fm6 · · Score: 3, Insightful

      It's an obvious combination for somebody who prefers PPC architecture to Pentium, but doesn't want to deal with MacOS. Mac diehards would never concede that anybody can design a user interface better than Apple -- but some of us are thoroughly adjusted to an X- or Windows-style user interface, and don't find it worthwhile to retrain ourselves.

    10. Re:The point by Nehi+the+Ganchark · · Score: 0

      At the risk of being off-topic...

      Not that I can see what the all-in-one G3's have to do with running Linux with the G5 liquid-cooling system, but you CAN install OS X on the all-in-one machines (and other older 'unsupported' power macs) with XPostFacto3.

      As for price... well, it no fault but your own if you're going to be cheap. :)

    11. Re:The point by Anonymous Coward · · Score: 1, Informative

      you gave a look to the ppc kernel AGES ago :) Firewire support has been there since early 2.4 release, at least.

    12. Re:The point by Anonymous Coward · · Score: 0

      $0, as it's figured into the cost of that several-thousand-dollar aluminum-clad computer you just bought.

      Nice try, but work harder next time.

    13. Re:The point by pkhuong · · Score: 1

      So, recompile your apps and use a X server?

      --
      Try Corewar @ www.koth.org - rec.games.corewar
    14. Re:The point by fyonn · · Score: 1

      well, the xraid itself is not reason to buy an xserve as the xraid is desiged to be cross platform. so you can use the xraid with your dell server quite happily. the management app is java and connectivity is fibre channel and ethernet so no major cross platform issues.

      I've read of some people buying xraids to use with pc systems as it's just a very good and cheap storage subsystem.

      dave

    15. Re:The point by fm6 · · Score: 1

      Did you miss what I said about the Mac UI?

    16. Re:The point by pauljlucas · · Score: 2, Informative
      ... some of us are thoroughly adjusted to an X- or Windows-style user interface, and don't find it worthwhile to retrain ourselves.
      You do realize you can run X-Windows under MacOS X out of the box, right? And you can install KDE, Gnome, or whatever your favorite X-Windows window manager is and run it in rooted mode so you couldn't even tell it was running MacOS X, right? Right?
      --
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    17. Re:The point by pkhuong · · Score: 1

      OK. So you like Mac UI's? Use it.

      Or do you mean you don't like Mac UI's? Well guess what? It's the same app whether you recompiled it or not. People are actually complaining about this for firefox - they don't follow Mac's standards for accelerators. Again, recompile + X.

      --
      Try Corewar @ www.koth.org - rec.games.corewar
    18. Re:The point by Onan · · Score: 2, Informative

      $0 with every mac.

    19. Re:The point by xiaodidi · · Score: 1

      but some of us are thoroughly adjusted to an X- or Windows-style user interface

      You can run X11, and KDE, etc. on Mac OS X no problem.

      No, you can't run MS Windows on a Mac. But that really wouldn't make sense.

    20. Re:The point by Lussarn · · Score: 1

      If you only run open source apps so why not. Why learn another OS if Linux already do what you need. From a *nix standpoint Linux pretty mouch stomps all over OS X too.

    21. Re:The point by fm6 · · Score: 0
      You do realize you can run X-Windows under MacOS X out of the box, right?
      In which case you still have the MacOS user interface. I'm not going to repeat what I said on that topic.
      And you can install KDE, Gnome, or whatever ....
      So major hacking of MacOS is an alternative to replacing it with Linux. Fair enough. But that doesn't mean that nobody will prefer the replacement to the hacking.
    22. Re:The point by fm6 · · Score: 1

      Actually, you can. But that's beside the point. If you really want to know the point, try reading my post again.

    23. Re:The point by byolinux · · Score: 4, Insightful

      GNU/Linux is free software. Perhaps you only want to run ONLY free software on a very fast, well engineered computer?

      That's a reason why.

    24. Re:The point by xiaodidi · · Score: 1

      It's an obvious combination for somebody who prefers PPC architecture to Pentium, but doesn't want to deal with MacOS. Mac diehards would never concede that anybody can design a user interface better than Apple -- but some of us are thoroughly adjusted to an X- or Windows-style user interface, and don't find it worthwhile to retrain ourselves.

      You can do many things with different architectures. It's a matter of cost/benefit. For me it's not worth putting up with the complexity of Linux installation/maintenace/upgrade, when I can run all the UNIX/X11 apps I need under OS X.

      You may have other concerns and requirements. But if you can honesty say that running Linux on Apple hardware is better than on intel, then you have a winner.

    25. Re:The point by jcr · · Score: 5, Funny

      Mac diehards would never concede that anybody can design a user interface better than Apple

      That would be because only one company ever did, and Apple bought them for $400M.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    26. Re:The point by nathanh · · Score: 2, Interesting
      Not to troll...but what is the point of running Linux on the Mac, aside from the "because we can!" which is a valid reason. :-)

      Because I prefer Linux (honest) and Apple's hardware is really nice. Fortunately I can get the best of both worlds. Viva LinuxPPC.

    27. Re:The point by nathanh · · Score: 4, Informative
      Last I checked, the Linux PPC kernel doesn't even support FireWire,

      Uhh, works fine for me. External firewire HDD hooked up to PowerBook G4 running Debian.

    28. Re:The point by tverbeek · · Score: 3, Insightful
      "And you can install KDE, Gnome, or whatever ...."

      So major hacking of MacOS is an alternative to replacing it with Linux. Fair enough. But that doesn't mean that nobody will prefer the replacement to the hacking.

      Oh, please! It's hardly "major hacking". Installing KDE on top of the X11 that comes with OS X is no more difficult (probably less) than installing KDE, X11, and Linux on the same Mac.

      If you prefer Linux over Darwin (which is what we're really talking about at this point) that's a perfectly reasonable preference. (I'm planning to use Yellow Dog Linux on some old Apple hardware I want to use as a firewall, simply because I know how to do it with Linux and I'd have to start at square one figuring out how to do it with a BSD system.) Trying to support that choice by complaining about the OS X UI which is rather easily replaceable is not.

      --
      http://alternatives.rzero.com/
    29. Re:The point by rb4havoc · · Score: 2, Interesting

      You say that, but I've been using a Mac since the late 80s, and whenever I went to install Linux recently on my PowerBook, I had some diehard Linux users ask me why I wanted to do that. Apparently they think OS X is better...

      --
      "There are 10 types of people in this world--Those that understand binary, and those that do not..."
    30. Re:The point by pauljlucas · · Score: 0
      So major hacking of MacOS is an alternative to replacing it with Linux.
      Uh, no. Among other easy ways: install Fink, then install KDE or whatever in a few commands, and it's done. No hacking. It really it quite trivial.

      Why don't you actually do some investigation and know what you're talking about before writing?

      --
      If you reply, do so only to what I explicitly wrote. If I didn't write it, don't assume or infer it.
    31. Re:The point by Brandybuck · · Score: 1

      There's Darwin, which has the advantage of being NATIVE...

      --
      Don't blame me, I didn't vote for either of them!
    32. Re:The point by prockcore · · Score: 1


      That would be because only one company ever did, and Apple bought them for $400M.


      No, no no. Palm owns Be.

      Oh, you meant NeXT...

    33. Re:The point by byolinux · · Score: 2, Insightful

      What's not native about the Linux kernel running on a PowerPC Chip?

    34. Re:The point by jcr · · Score: 1

      Well, Be designed a pretty good UI, but I wouldn't say it topped Mac OS 7.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    35. Re:The point by Anonymous Coward · · Score: 0

      Never talk "native" with mac heads. They trounce you with buzzwords like "native resolution", whatever that means?

    36. Re:The point by byolinux · · Score: 2, Insightful

      native resolution is the correct resolution of an LCD, isn't it?

      like a lcd than can do up to 1280x968 or whatever, is at native resolution when it's doing 1280x968.

    37. Re:The point by Large+Green+Mallard · · Score: 1

      The AIO is the *wrong* solution for clustering. Even with the monitor off, it generates a lot more heat than say a PMG3 of the same era. But as a head-unit for a cluster, it wouldn't be too bad I guess.

    38. Re:The point by Anonymous Coward · · Score: 0

      Not to troll...but what is the point of running Linux on the Mac, aside from the "because we can!" which is a valid reason. :-)

      Freedom.

    39. Re:The point by Anonymous Coward · · Score: 0

      If you're buying a new Mac, it's free. Or bundled with the hardware, whichever way you want to look at it (and there's no way to un-bundle it.)

      So in other words, it's not "free as beer", not "free as speech" but "free as Windows", right?

    40. Re:The point by SmittyTheBold · · Score: 1

      I wouldn't say it was necessarily better or worse - but it had different hang-ups than the Mac OS of the day. There were some areas that I think Be did much better - interface responsiveness, live filesystem queries, and MIME filetypes versus a the 'proprietary' type/creator system. (Granted, the type/creator codes were *great* but BeOS was more in-step with the emerging Internet world.)

      [And anyone that seriously contends that the NeXT OS of the day was better than the Mac OS is mentally deficient.]

      --
      ± 29 dB
    41. Re:The point by Anonymous Coward · · Score: 0

      If a cheap linux cluster is your goal, then the question becomes 'why apple hardware'?

    42. Re:The point by jcr · · Score: 1

      Granted, the type/creator codes were *great*

      No, they weren't. They were a major PITA on a daily basis for me, from 1984 through 1989 (which is when I swtiched to NeXTSTEP)

      anyone that seriously contends that the NeXT OS of the day was better than the Mac OS is mentally deficient.

      From this statement, I can only conclude that you never used NeXTSTEP yourself.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    43. Re:The point by diamondsw · · Score: 1

      Ahem, he said user interface, not API.

      --
      I don't know what kind of crack I was on, but I suspect it was decaf.
    44. Re:The point by SmittyTheBold · · Score: 1

      I actually have. I still don't agree that is was better, from an end-user-experience level, than the classic Mac OS.

      Now, what OS X has turned it into, has definitely added something - but I'll also concede that mixing two such disparate OS heritages into one 'experience' is prone to inconsistency, which is still fairly apparent in OS X.

      --
      ± 29 dB
    45. Re:The point by SmittyTheBold · · Score: 1

      Granted, the type/creator codes were *great*

      No, they weren't. They were a major PITA on a daily basis for me, from 1984 through 1989 (which is when I swtiched to NeXTSTEP)


      In addition, I would still contend that the type/creator methodology was great for its ability to associate a specific file of a type with one application while another file of the same type could be associated with another application was great. [Apologies for nonsensical run-on sentence.] I wish there had been something in the basic UI that allowed a user to re-assign creator codes through the Finder, but that hole was filled to some extent by various shareware/3rd-party utilities.

      --
      ± 29 dB
    46. Re:The point by Anonymous Coward · · Score: 0

      No, they weren't. They were a major PITA on a daily basis for me, from 1984 through 1989 (which is when I swtiched to NeXTSTEP)

      The concept of file type metadata was a PITA, or the fact that there wasn't a tool to easily change bindings? Face it, if Finder on 9 had provided the same "open with" UI as it does on X, they really wouldn't have been such a problem.

      The QT/Translation Manager extension mapping stuff (introduced after you switched) meant that 9 acted pretty much as X does for documents that have an extension but no type/creator, except without a UI to change bindings. Oh, and where you had a magic Desktop Database that occasionally got corrupted, you now have a magic LaunchServices db that gets corrupted. Yah for progress...

      From this statement, I can only conclude that you never used NeXTSTEP yourself.

      I can't speak for the other guy, but I did use both. NeXT were certainly ahead of their time for the first couple of years, but then proceeded to stand still while everyone else caught up. Much as it pains some ex-NeXT users/developers to admit it, their favorite platform really wasn't the Advanced Alien Technology it's made out to be...

    47. Re:The point by Anonymous Coward · · Score: 0

      You're asking the wrong question. Most people running Linux on PPC used to run it on other architectures before.

      They are moving from Linux on ia32 to Linux on PPC. So their decision is NOT MacOS X versus Linux, it's ia32 versus PPC.

  5. Horse shit by Erect+Horsecock · · Score: 5, Informative

    The only thing apple will drop the warranty from if you install linux on it is the iPod. If you put linux on your mac and have problems with it they wont provide software support, but will still cover the hardware. ihbt

    --
    I hope you die painfully and alone.
    1. Re:Horse shit by tverbeek · · Score: 4, Informative

      Similarly, our Apple rep (showing off the insides of the new G5 iMac) explained that if you put a bigger hard drive in it, Apple simply won't cover the hard drive, and if the hard drive catches fire and melts the rest of the system they won't cover the damage. But the rest of your hardware is still under warranty.

      --
      http://alternatives.rzero.com/
  6. Re:VNC? by Bastian · · Score: 4, Informative

    Why use VNC? Wouldn't this do the job just as well (or better)?

  7. Site getting slow -- Coral Link by bobbozzo · · Score: 1
    --
    Nothing to see here; Move along.
    1. Re:Site getting slow -- Coral Link by Anonymous Coward · · Score: 0

      Terrific! the original site is up and working, and the coral cache is down.

      Are coral caches some in-joke I'm missing?

  8. Re:VNC? by Zachary+Kessin · · Score: 2, Interesting

    Well i use both to be honest. VNC has a few major features I like. For one thing I can get a full KDE Or Gnome Desktop. I can also shut down the mac and leave the KDE session running. I can also move the session between any of several screens.

    On the minus side the way I have things right now I only have 15 bit color over VNC, when I tried to put it to 24 bit mode it gave me very strange colors.

    --
    Erlang Developer and podcaster
  9. not hardware controled!? by bjarthur123 · · Score: 3, Interesting

    do i understand correctly that the fans and liquid-cooling system are not controlled by hardware? so if your OS crashes or otherwise malfunctions, then your CPU could overheat? does this seem like a really bad way to engineer things to anyone else?

    1. Re:not hardware controled!? by fyonn · · Score: 4, Informative

      I don't know for a fact, but I imagine the liquid cooled system works the same way as the fans do in the currn g5's. the OS software overrides the bios control. the bios control on it's own will run all the fans at maximum (loud) speed, so without software support for the cooling system in linux, it'll sound like a jet engine.

      dave

    2. Re:not hardware controled!? by Quobobo · · Score: 1

      ...which really doesn't address the grandparent poster's concern. Obviously the OS overrides the bios, but what happens if there's a problem with the OS? Considering how this story is about support in Linux for the cooling system, I can't believe you got modded up.

    3. Re:not hardware controled!? by Anonymous Coward · · Score: 0

      I would assume that there is a temperature threshold that if it is passed, the fans turn on full blast no matter what the OS says.

  10. The real reason to pick Linux over OS X is ... by Nice2Cats · · Score: 4, Funny
    ... NetHack for OS X / Darwin only seems to come in the girlie man Qt version. Some things in life are simply more important than cool graphics, a consistant user interface, and easy to use multimedia apps.

    1. Re:The real reason to pick Linux over OS X is ... by Random832 · · Score: 1

      i'm sure the text interface compiles just fine.

      --
      We've secretly replaced Slashdot with new Folgers Crystals - let's see if it notices.
    2. Re:The real reason to pick Linux over OS X is ... by Anonymous Coward · · Score: 0

      One word: fink

    3. Re:The real reason to pick Linux over OS X is ... by Anonymous Coward · · Score: 0

      One word: didn'tgetthefuckingjokeman

  11. Noise by xiaodidi · · Score: 2, Informative

    If it's like the Xserve, in the absense of OS control, the fans will run at full blast (as mentioned by the previous poster). This is unbearably loud in the case of the Xserve, as I have experienced. It's probably bad for the fans, which will eventually fail. So if the analogy with the Xserve holds, you better not do it. You can try for fun for a few minute.

    1. Re:Noise by Quobobo · · Score: 2, Insightful

      No, no, no. We're not talking about the OS failing completely, but about it operating incorrectly. Say that it messes up and causes the fans to spin much lower than they should (or not at all), causing massive overheating. I know there's safeguards for when the fans aren't under OS control, but what about when they are and there's an OS problem?

      It's posssible that the firmware will override the OS in such a situation, but I've never heard anything about something like that.

    2. Re:Noise by xiaodidi · · Score: 1

      Looking at my Xserve, it's hard to imagine how the OS could fail to control the heat. There are temperature sensors everywhere. I can check the temperature at various points inside the enclosure, e.g. at the CPU, at the DIMMs, etc., and get a numeric and graphic report from a software application. On the other hand, when the OS doesn't load, as it happened once, the fans start spinning full blast automatically.

      Assuming a desktop G5 has similar heat controls, I would think that

      1) the OS can control very well the heat, if it's working and properly designed
      2) in case of outright failure -- or under well-designed error traps -- the fans will kick in and save the day.

    3. Re:Noise by Quobobo · · Score: 1

      1) the OS can control very well the heat, if it's working and properly designed

      Just read the article: "This version (#4) fixes a bug with the backside fan doing crazy things, it appears to work properly on the dual 2.5Ghz now."

      I think simply expecting all sofware to perform flawlessly is a bad idea when you're talking about something that could damage your hardware.

    4. Re:Noise by fyonn · · Score: 3, Informative


      well, I had some overheating probs with my g5 once (apple fixed them for me) and I'd come to my machine in the morning, the screen was blank and the fans were on "jet fighter" mode, which implies to me that if the OS stops taking an active interest in the fans then the firmware will step in and solve the problem the only way it knows how (max out all the fans). certainly the machine was unharmed when I rebooted it, nic and cool in fact :)

      how it determines this I don't know, and I suspect few people outside apple do (unless it's a technical document in the archive), but if osx finds some way to crash badly and lets the fans stop, or not go fast enough etc, then you'll have some comeback to apple. if it happens while you're using linux then I suspect you're SOL. however, I would imagine that if linux fails to control the fans properly then the firmware would again step in to save the day.

      it might simply be a case of, if the internal temp gets too high then the firmware maxxs all the fans

      the desktop g5 doesn't have quite as many temp sensors as I thikn the xserve does (cpu in and out, per cpu, drive bay, motherboard, exhaust and... umm think thats it)

      dave

    5. Re:Noise by MoneyT · · Score: 1

      How would having the control in hardware solve the problem of the controls being corrupt? Hardware can fail just as easily as software can.

      --
      T Money
      World Domination with a plastic spoon since 1984
    6. Re:Noise by Lars+T. · · Score: 4, Informative
      Hardware: Power Mac G5 Developer Note: Fan Controller

      [...] If the FCU does not receive an update from the operating system within two minutes, it begins to ramp up the speed of the fans to full speed.

      --

      Lars T.

      To the guy who modded me down from perfect to terrible Karma - Apple haters still suck

    7. Re:Noise by Midnight+Thunder · · Score: 1

      how it determines this I don't know, and I suspect few people outside apple do

      Well I could guess that the system cycles updating retrieving and sending back controls to the firmware. If the firmware fails to receive after a certain time it would fall back to default mode. If this is the case then any OS that does not know how to control the hardware would be running with a fan full blast.

      --
      Jumpstart the tartan drive.
    8. Re:Noise by Quobobo · · Score: 1

      Ah, thanks. Seems weird to say it, but it's good to know I was wrong.

    9. Re:Noise by Ohreally_factor · · Score: 1

      Ah, thanks. Seems weird to say it, but it's good to know I was wrong.

      The difference between a realist and a pessimist.

      --
      It's not offtopic, dumbass. It's orthogonal.
  12. NEVER follow links posted with that sort of name. by Anonymous Coward · · Score: 0

    You must be new here.

  13. Penguinistas have no God by catmistake · · Score: 2, Funny

    It's not as interesting as running linux on a ratty copy of Moby Dick. Slow it down? The chip is sacred!

    1. Re:Penguinistas have no God by Anonymous Coward · · Score: 0

      MASTODON rules!!!

  14. Coral explained by Anonymous Coward · · Score: 0

    I feel your pain. Everyone keeps dropping the term like everyone knows it. When I asked, no one ever responded. So seeing your question, and after finding this, I thought I would share. It looks like Coral is an akami-like system run out of NYU.

  15. nice if true by Random832 · · Score: 1

    there need to be more sane policies like that one. like, say, printer manufacturers only not covering the refilled/off-brand cartridges themselves, rather than dropping coverage from the whole printer

    nah, not gonna happen.

    --
    We've secretly replaced Slashdot with new Folgers Crystals - let's see if it notices.
  16. NSW Signature! by MarcQuadra · · Score: 3, Funny

    dude! not fscking funny!

    I'm sitting in the corner of a classroom full of kids checking out slashdot while a computer finishes imaging, and i checked-out your sig. You should really let people know that your sig-link has Work Unsafe images on it, not say "I made a funny".

    --
    "Sometimes, I think Trent just needs a cup of hot chocolate and a blankie." -Tori Amos on Nine Inch Nails
    1. Re:NSW Signature! by Carnildo · · Score: 1

      You haven't been here long, have you?

      --
      "They redundantly repeated themselves over and over again incessantly without end ad infinitum" -- ibid.
    2. Re:NSW Signature! by Bullet-Dodger · · Score: 2, Funny

      You must be new here. It's supposed to be, "You must be new here.".

    3. Re:NSW Signature! by MrPerfekt · · Score: 1

      You'd think the username "Nice Horsecock" would've been a minor hint to his mentality.

      --
      I just wasted your mod points! HA!
  17. ...with your flag by MarcQuadra · · Score: 1

    is your sig from the Sage Francis song "makeshift patriot"? If you haven't heard it, I suggest you do. He's a cool guy too, used to listen to him locally and on the college radio.

    --
    "Sometimes, I think Trent just needs a cup of hot chocolate and a blankie." -Tori Amos on Nine Inch Nails
    1. Re:...with your flag by bobbozzo · · Score: 1

      Stole the sig off another site after Patriot Act passed. Haven't heard the song but will look for it.

      --
      Nothing to see here; Move along.
  18. Why? by amichalo · · Score: 4, Interesting

    is this like those other times when people have gotten linux running on their Palm or Xbox or clock radio?

    I am not trying to flame but I just don't see the point - OS X is BSD. You've got X11. you can run all sorts of apps from the OS X command line (from apache to fink to vi) so what's the appeal of running linux?

    All I coud figure is the desktop environment.

    --
    I only came here to do two things; kick some ass, and drink some beer...looks like we're almost out of beer.
    1. Re:Why? by FLAGGR · · Score: 1

      I think your new here. The obvious answer is "why not?"

    2. Re:Why? by amichalo · · Score: 2, Funny

      I think your new here

      I think you're new here. But let's do the math for fun.

      800770
      - 132545
      --------
      668225

      668225 / 132545 = 5.04

      Yes, it would appear you're more than five time newer in fact. Not that anyone is trying to quantify 'newbeeness'.

      But to qualify the 'newbeeness', I took a look at your previous posts and I would say that you are still in search of an elusive score of 5 to improve the old Karma. Hint: you will have to do more than post "why not?" to get someone to mod you 'funny' or 'interesting' or 'insightful'. Try posting an observation about the subject, oh I don't know, like this one:

      this like those other times when people have gotten linux running on their Palm or Xbox or clock radio?

      I am not trying to flame but I just don't see the point - OS X is BSD. You've got X11. you can run all sorts of apps from the OS X command line (from apache to fink to vi) so what's the appeal of running linux?

      All I coud figure is the desktop environment.

      --
      I only came here to do two things; kick some ass, and drink some beer...looks like we're almost out of beer.
    3. Re:Why? by Anonymous Coward · · Score: 0

      spanked. Soundly spanked.

    4. Re:Why? by mdarksbane · · Score: 2, Informative

      There are a few reasons.

      1) It's an old mac that barely runs OS X. If you stick a fresh copy of Gentoo on it, especially with a minimalistic window manager, you can get much better responsiveness than on X. I believe it's pretty much the only way to get smooth DivX video on a G3 400 mhz and lower (and even then, you have to play a bit). This also comes into play in a server situation, when you don't need all the niceness of OS X, just some speed and stability.

      2) It's what you're familiar with. Sure, OS X is BSD-based and has a nice interface, but it does handle some of the configuration differently from whatever version of linux you might be used to. There's also the concern that not all *nix apps build for OS X, or build easily even if they do. Portage, I know, is one tool that one of my Linux-on-mac using friends refuses to do without. There's also the issues that some people prefer a very minimalistic window manager, which you can *do* on top of OS X, through X11, but you lose most of the speed advantages of doing so.

      So, in short, there are some very specific reasons that a very linux-ie person might like to run that on their new ibook or G5 instead of OSX.

    5. Re:Why? by amichalo · · Score: 2, Interesting

      okay, I'll give your #2 a bit of validity, but as for #1, this article is about Linux on the liquid cooled dual processor G5 - so saying Linux is useful for a box that can barely run OS X won't apply to this box.

      as for #2 - is the Linux interface (KDE, Gnome, watver) so 'familiar' and impressive that someone would take all the time to port the OS to PPC? I mean, I have used Linux in various forms for several years, though only ever as dual boot, and I must say that savge Redhat 9, I thought the distributions had pretty poor interfaces, just look/feel/navigation wise, compared to Windows, which itself is so very, very bad.

      Oh well, guess it comes down to personal preference.

      --
      I only came here to do two things; kick some ass, and drink some beer...looks like we're almost out of beer.
    6. Re:Why? by mdarksbane · · Score: 2, Interesting

      Yeah, interface is all about preference. Personally, I agree with you, but I've been using macs as my preferred platform for years.

      I don't think it's mostly about the graphical interface, though. It's more the command line stuff, and the programs you're used to having. Sure, a lot of them are available for OS X, but not all, and often not in quite as nice of a form, or the configuration files being where you're used to them, and working how you want. I'd say it's the same reason people prefer Linux's various interfaces over windows. I honestly don't think Gnome or KDE is even as polished as windows, but they aren't the entirety of the interface. That way you interact with the machine on the command line and configuration files are part of it, too.

      That said, clustering and fitting the machine into your existing server network are two other reasons. I'd bet that you can get a version of linux that'll make that G5 run certain tasks faster than OS X does. In that case, interface doesn't really matter, as long as you can set it up to begin with. OS X isn't as specifically at scientific applications as some versions of PPC linux.

    7. Re:Why? by Bingo+Foo · · Score: 1

      He did use "your" incorrectly like a true veteran, though.

      800k Slashdot IDs? I have five or six I've scrapped. I wonder how many of those are active.

      --
      taken! (by Davidleeroth) Thanks Bingo Foo!
  19. Re:The point is... by Arcane_Rhino · · Score: 1
    Though the Anonymous Coward post explains it with good reasoning (Cross platform compatibility...), I think there is a secondary reason why Linux users would be excited about another PC configuration on which to install Linux that is a little alien to the typical Mac user.

    At a Linux meeting I attended a while back a woman (an ex-windows user) asked the group, "about how much time one should allocate to installing a Linux network of four or five workstations in a new accounting office: an afternoon, a day, a weekend?" After some discussion, the final response was, "well... I suppose you could get it done in a day or two. But, really, Linux is a lifetime of fun."

    The look on her face was priceless. And the guy who responded, along with the rest of the group, was absolutely sincere. They genuinely could not even comprehend the idea of creating a production environment and walking away once it was operational.

    So, aside from the entirely reasonable answers given elsewhere, "Linux is a lifetime of fun."

  20. Point: Don't need GUI, have Altivec friendly app by AHumbleOpinion · · Score: 2, Insightful

    Consider the more highly technical where you don't need a consumer oriented GUI and where you have an application whose algorithms are well suited to Altivec. For example the US Navy's sonar image processing.

  21. OFFTOPIC? by Anonymous Coward · · Score: 0

    Parent is off topic how exactly? I think the moderators don't like to hear the ugly truth, that Apple may have out Linuxed Linux and so they don't want to pay creedance to the possibility that it may not be advantageous to replace OS X with Linux on a G5 box.

  22. Geek cred (Re:Why?) by supabeast! · · Score: 2, Funny

    "I am not trying to flame but I just don't see the point - OS X is BSD. You've got X11. you can run all sorts of apps from the OS X command line (from apache to fink to vi) so what's the appeal of running linux?"

    Nerd cred. See, for a while it was cool to dual-boot Linux and Windows, but then all the nerds got out of college and bought a second PC. So then it became cool to run Linux and just run Windows on an old PC for running Quicken, MS Money, or updating the all important resume in MS-Word format. But after a while everyone realized that Linux doesn't need any real processing power because the only games that run on Linux come out long after the Windows versions, so everyone switched to Windows on the fast machine and Linux on the old one.

    At that point all of the nerds with cool tech jobs decided to show off by running Linux on on Sun/Dec/IBM RISC machines they bought on ebay for stupid sums of money because at that time there were no sub-1000 Sun desktops. Then the dotcoms crashed, and over the past few years ebay has been flooded with cheap RISC machines from failed dotcoms, so people wanting to show off had to buy some other overpriced RISC machine to run Linux on. Where can you turn to get an overpriced RISC machine that runs Linux but still costs less than a Hyundai? Apple computers!

    See, it's all about people trying (and failing) to look cool. It's just like guys who buy a $1000 1984 Corolla, slap on a "spoiler" made from scrap metal and old screws, and finish it off with $9.95 Wal-Mart hubcaps that are supposed to look like spinner rims. Of course, they're still dorks, they still get no pussy, but it impresses fourteen-year-olds who like to post to web forums about how cool they are and how they hate their parents who make them use AOL and won't let them dual-boot the family machine to a install of Mandrake 7.0.