Okay. That's it. I'm done. Battery capacity is now software locked? Are you fucking kidding me? Hi Tesla buyer! Here's a car with a 75kWh battery pack for $70,000. BUT! That price is for the base charge range of 60kWh. IF you want that last 15kWh, pay us even more money and well unlock it. Otherwise you'll be driving around a half charged car for the rest of its useful life.
My company sold a pretty nice knee mill for scrap which was only a few hundred. We also scrapped a few hundred pounds of tooling like chucks, vices and other holding tools. Sad day.
The whole issue is based on ethics of business. If they are willing to cheat the emissions, what else are they willing to cheat? It breaks trust between the regulators, governments and customers.
Worse now, there are over what, over a million people driving around in cars that are operating illegally. What happens now? Do they get a special pass and let the cars keep operating? Will they be allowed to legally transfer then to another owner? Or will they be forced to update the computer and possibly face the possibility of reduced performance and fuel consumption, essentially gimping the vehicle. The best approach would be to suspend all VW diesel sales, grandfather in all the cheat cars and slap the shit out of VW. It's a good compromise which protects the consumer and punishes the manufacturer.
First, i'd be more worried about the neighborhood locals. What is the neighborhood ethnic makeup? If it's mostly black and you aren't black, then I'd be weary. If it's white trash and you're not white, I'd also be weary. Same for everyone else. *Blend in. Don't wear fancy clothes, iPod accessories or anything that is valuable. Don't flaunt wealth. If some destitute drug addict sees you, you're a big juicy target. *Ditto for gang members looking at an outsider. They most likely will rob you to exert power over you. They want you to be a cowering victim. You most likely wont get your ass kicked if you just act scared and give then what they want.
I'v been robbed at knife and gunpoint when I went to high school in Jamaica, Queens. It was a primarily black neighborhood and during freshman year I was a frequent target being a white kid. It was more a joke for them, robbing the lone white kid of two or three dollars and laughing at me. I learned to make friends with kids who took my bus so when we got off or walked to it, we rolled deep. After that no one ever went near me again. Also, don't be a hero. Even if you think some fighting classes are worth it or your a big guy, just don't be dumb. A gun doesn't care and neither does a drug addict.
I'm assuming you will be renting an apartment? Cameras are your best friend. Setup a few hidden inside cameras inside which will catch someone wandering around tearing up the place looking for valuables. Keep them low and head level if you can. A raspberry pi and web cams will satisfy your Linux craving if you go that route. Use a big USB key, 128GB+ to record on a loop. That or get fancy and make a cloud setup for remote access and recording.
Make it look like someone is home. A light coming on if a loud noise is made or window/door is touched will help. Arduino project perhaps? Maybe send a text if an event comes through. Then use your phone to connect to your web cams to have a look around. The sound of a dog barking is also pretty damn good. Get a big ass dog if you can. No crack head wants to mess with a dog. Dogs, and good outdoor lighting are the best security if you ask me. Plus, you can walk the dog to stores and no one will mess with you.
Oh, and leave some money laying around in your house. Most break-ins are by drug addicts. If you have 60 bucks on the kitchen table, hopefully that is all they want and they will get the hell out. Keep smaller electronics out of sight like gaming systems laptops and tablets. They go for the low hanging fruit. My friend had his car broken into in a real bad area populated by homeless drug addicts. The back of his car was all computer boxes will Dell and HP printed on them as he was a travelling service tech. They broke his window and stole his ashtray which had a few bucks in cash and a bunch of change. Didn't take one box or the fancy radio. They don't want to fence or pawn shit if they can get cash. Drug dealers take cash only.
Up your cutting pressure and what that does. A cheap air compressor can be had from one of those Chinese junk importers (In the states we have a chain called Harbor Freight).
Normally, the cutting assist jet is a nozzle that encloses the lens or isolated form the lens via a sacrificial cover glass. The gas jet is in parallel with the beam and the lens is kept free of contamination due to the cavity in the nozzle being at a high positive pressure. Sounds like you assist jet is external and designed to be aligned with the focal point of the beam. Even tough you have a cheap setup, doesn't mean you cant tweak it to perform better.
check your Focal length and focus height. If you have a very short focal length the the beam is very fat a few mm or less from sharp focus. Try to get sharp focus at the center line of your material and see how that cuts. Worse case is you will need to compensate for the depth of the bevel in your cad program and then sand it down. If you can, go for a longer focal length lens. Another idea is to check the air assist pressure, might be too low. At work we typically run 5.5 - 7 bar (~80-100 psi). Big cutting shops run really high pressure, upwards of 34 bar or more. BTW, focal length is from the center line of the lens so measure from there. Our lenses range from 100mm to 300mm depending on what we need the beam to do.
Reference: I work in an electron beam and laser welding/cutting shop.
su is not only for root. it has a dual purpose: switch user or super user. Sometimes you might have to run a command as another user. So if you need to login as Gary you $su gary and type in Gary's password.
You want horrible? Try the fact that the Acer laptop my grandmother bought and then have to me after she decided computers weren't her thing has a severely limited BIOS. I can't control any CPU features such as enabling Intel vt or controlling hyper threading. Nothing. Just the boot order and a few other basics. Never have I been so pissed at a piece of hardware. That last line may be a lie.
My micron 486 came with a factory CD contrasting containing windows 3.1 and DOS 6.22. They also supplied a boot disk to get it all working. Still have the PC and the CD somewhere. Might still even have the boot disk.
...except that their drivers don't use it. Yes, there's a IOMMU in modern CPU. No, current GPU drivers don't use it fully. (According to several source about this proof-of-concept neither Nvidia's nor AMD's drivers do properly use IOMMU to isolate de GPU. They basically just grant the device wholesale access to the memory).
I misunderstood you due to bad verbiage: "No, current GPU drivers don't use it fully." The driver has nothing to do with enabling the IOMMU. The IOMMU automatically maps a device into its own virtual address space. This prevents a random device from reading arbitrary memory outside of its virtual space. The kernel then uses a table provided by the IOMMU to figure out where things actually are in physical address space. BUT if a driver for that device allows it to read random memory locations, then there is a problem. I assume this stems from the newer GPGPU and HSA functionality which aims to reduce overhead by allowing the video card to read certain memory locations directly instead of copying.
The driver does not have to enable the IOMMU, that is automatic. The driver lives in kernel space and from there can do what it damn well pleases in terms of reading/writing memory if the developer inserts such functionality. The driver isn't disabling the IOMMU or failing to enable it, it is allowing the malicious code to read arbitrary memory through vulnerabilities at the kernel level. This bypasses the IOMMU, not disables it. The only protection would be to better enforce memory access privileges in the kernel and/or remove the arbitrary memory access problem.
A good analogy would be a quarantine facility with individual outer doors for each room, each of which is occupied by a single patient (a device). Patients can come and go as they please using their doors. But inside the facility, there is a hall which connects all of the rooms via a locked door for each room (IOMMU). Patients cant open that door but someone with a key can (the kernel). From the hall, a nurse can visit any patient(driver). But a patient can not leave the room through the locked door without that nurse. This isolates the patients from each other. *BUT* if the patient fools the nurse into allowing them into the hall, or the nurse allows them to wander out of the door, then all bets are off. That is what is happening here, the malicious code running on the GPU is fooling the nurse (driver) into leaving the room and wandering into another.
The kernel is the weak spot of any OS. It marshals userspace code and prevents it from reading arbitrary memory and segments users. But once inside the kernel, code can do whatever the kernel allows which is pretty much anything. I can write a module that allows arbitrary memory access from userspace if I wanted.
Not sure where you are getting this floppy business from. Virtualbox guest addition tools are loaded from a single CD image. All the driver packages are on that image. Hyper-V also uses a CD image. I have also used VMware in the past and they too used CD images.
Perhaps you are confusing that with the provided floppy controller emulation.
The IOMMU does take care of the DMA problem but I am betting this has something to do with how the GPU kernel talks to the OS kernel. The OS controls memory so perhaps some driver exploit fools the kernel into reading the wrong memory. The GPU says hey I need this memory and since the GPU driver lives in kernel space, it's possible it could randomly read protected memory.
Nvidia and AMD need to properly implement support for IOMMU & the MMU inside the GPU itself.
The IOMMU solved this by even giving each IO device its own virtual IO memory space. So no, the GPU can't randomly read protected memory. Nvidia and AMD don't have to implement anything as this is the job of the IOMMU, not the endpoint device itself.
This was the same problem with the Firewire DMA exploit. Essentially before the IOMMU it was possible for any PCI card to randomly read any memory it wanted to. Firewire being a memory mapped serial bus, easily allowed DMA access to a running or crashed machine. It was used for Linux kernel debugging because even if the kernel crashed taking out the machine, the other I/O subsystems were still functional. You could still dump the contents of RAM to another PC to analyze what went wrong.
Nah, it's just ignorance. The average person doesn't understand how diesel differs from gasoline. All they know is it goes into a vehicle and makes it run, just like gasoline. So I assume they just wind up calling any fluid that goes into a fuel tank, gas.
Hell I bet if you asked the average person what diesel is a likely answer might be "gas for trucks".
Are you looking for a diy or a more off the shelf setup?
The most straightforward way for off the shelf might be to use a dmx (not the rapper) controlled lighting system. Very common and well documented protocol used to control lighting for commercial and entertainment setups. There are also a few others. Since it is also used extensively in the entertainment business, there might be software off the shelf that will sequence the lights and music. You can easily find usb-dmx controllers for well under a hundred bucks. Another bonus is there are also outdoor rated dmx lights and related components making it safe and easy for you.
Start here then read my rantings below: <url:http://www.instructables.com/id/arduilay/>
Why are you asking about wireless? What exactly do you want to be wireless? Each bulb or strand? Or, do you want the connection between your lights and controller to be wireless?
Either way you need to turn the lights on and off. For that you simply use relays. There are tons of arduino shields out there that feature a few 5 or 10 amp relays which are enough to drive a few strands of incandescent lights lights each. A zigbee shield can be used to make them wireless.
There are also plenty of simple usb controlled relay boards out there as well. I would go that route and possibly try to find one that is already in an enclosure with sockets and over current protection via a fuse or circuit breaker. There might be relay boards that are zigbee or wifi enabled but if you go wireless first: make sure you are not putting a non outdoor nema or iec rated box full of relays outside, exposed to the elements. The nema rating should be 4x and the iec ip rating should be 65 or better. My advice? Use extension cords and locate the relay box indoors.
The usb relay box should come with libraries that you can use to write your own software to control them. Many are just usb-serial devices that use a simple ascii protocol. Usually something like a command character like, followed by an address number for the relay and terminated with a carriage return. If you use an arduino there are probably simple i/o libraries for zigbee but you still might have to roll your own code for the arduino to glue everything together.
Remember for resistive loads like incandescent or basic led lights, watts = volts * amps. So if the relay is rated at 5 amps then the maximum wattage is 120 volts times 5 amps equals 600 watts maximum. If you live in a 230v country then you can double that if the relay is rated for use with 230-240v (they usually are but always check). Also be sure the total load can be handled by the outlet that you are plugging into. Back in the day when i used to get fancy my draw was around 16a. I used a heavy duty 12 awg cord that ran into my basement to a 20a dedicated circuit that came straight out of the panelbox.
If you are looking to control the brightness then it gets tricky. Led christmas lights normally are on a series string with basic current control using a resistor. That is why they have a slight flicker. Those can be dimmed using a few tricks. Ac is not easily varied without elaborate inverters using digital control. But if the load is mainly resistive such as incandescent or cheap led's then you can use a mosfet inside of a bridge rectifier to pwm the ac. Easier and better better than the old phase fired thyristor method of power control. The way it works is you wire a mosfet across the + and - dc "output" of the bridge. The ac terminals of the bridge are put in series with the load. This way you can pwm the ac waveform using a single mosfet. I have not used it outside of a simulator and have seen it only used once to control a tesla coil. But if the led's are current controlled then it won't work as the current controller looks to regulate the brightness of the led's by watching the current and switching the power on and off very rapidly to maintain a constant current. Led chris
Slashdot Mirror
When a website can track you, it's no longer a website. I call that malware. Why did we let this happen again?
Okay. That's it. I'm done. Battery capacity is now software locked? Are you fucking kidding me?
Hi Tesla buyer! Here's a car with a 75kWh battery pack for $70,000. BUT! That price is for the base charge range of 60kWh. IF you want that last 15kWh, pay us even more money and well unlock it. Otherwise you'll be driving around a half charged car for the rest of its useful life.
Fuckin magnets...
Sure have. Use it all the time to measure and verify the penetration of electron beam welds.
I think you meant language debugger.
My company sold a pretty nice knee mill for scrap which was only a few hundred. We also scrapped a few hundred pounds of tooling like chucks, vices and other holding tools. Sad day.
[goku@dragonball]$ scouter -h
It's over
Segmentation fault
[goku@dragonball]$
The whole issue is based on ethics of business. If they are willing to cheat the emissions, what else are they willing to cheat? It breaks trust between the regulators, governments and customers.
Worse now, there are over what, over a million people driving around in cars that are operating illegally. What happens now? Do they get a special pass and let the cars keep operating? Will they be allowed to legally transfer then to another owner? Or will they be forced to update the computer and possibly face the possibility of reduced performance and fuel consumption, essentially gimping the vehicle. The best approach would be to suspend all VW diesel sales, grandfather in all the cheat cars and slap the shit out of VW. It's a good compromise which protects the consumer and punishes the manufacturer.
Few things here.
First, i'd be more worried about the neighborhood locals. What is the neighborhood ethnic makeup? If it's mostly black and you aren't black, then I'd be weary. If it's white trash and you're not white, I'd also be weary. Same for everyone else.
*Blend in. Don't wear fancy clothes, iPod accessories or anything that is valuable. Don't flaunt wealth. If some destitute drug addict sees you, you're a big juicy target.
*Ditto for gang members looking at an outsider. They most likely will rob you to exert power over you. They want you to be a cowering victim. You most likely wont get your ass kicked if you just act scared and give then what they want.
I'v been robbed at knife and gunpoint when I went to high school in Jamaica, Queens. It was a primarily black neighborhood and during freshman year I was a frequent target being a white kid. It was more a joke for them, robbing the lone white kid of two or three dollars and laughing at me. I learned to make friends with kids who took my bus so when we got off or walked to it, we rolled deep. After that no one ever went near me again. Also, don't be a hero. Even if you think some fighting classes are worth it or your a big guy, just don't be dumb. A gun doesn't care and neither does a drug addict.
I'm assuming you will be renting an apartment? Cameras are your best friend. Setup a few hidden inside cameras inside which will catch someone wandering around tearing up the place looking for valuables. Keep them low and head level if you can. A raspberry pi and web cams will satisfy your Linux craving if you go that route. Use a big USB key, 128GB+ to record on a loop. That or get fancy and make a cloud setup for remote access and recording.
Make it look like someone is home. A light coming on if a loud noise is made or window/door is touched will help. Arduino project perhaps? Maybe send a text if an event comes through. Then use your phone to connect to your web cams to have a look around. The sound of a dog barking is also pretty damn good. Get a big ass dog if you can. No crack head wants to mess with a dog. Dogs, and good outdoor lighting are the best security if you ask me. Plus, you can walk the dog to stores and no one will mess with you.
Oh, and leave some money laying around in your house. Most break-ins are by drug addicts. If you have 60 bucks on the kitchen table, hopefully that is all they want and they will get the hell out. Keep smaller electronics out of sight like gaming systems laptops and tablets. They go for the low hanging fruit. My friend had his car broken into in a real bad area populated by homeless drug addicts. The back of his car was all computer boxes will Dell and HP printed on them as he was a travelling service tech. They broke his window and stole his ashtray which had a few bucks in cash and a bunch of change. Didn't take one box or the fancy radio. They don't want to fence or pawn shit if they can get cash. Drug dealers take cash only.
Up your cutting pressure and what that does. A cheap air compressor can be had from one of those Chinese junk importers (In the states we have a chain called Harbor Freight).
Normally, the cutting assist jet is a nozzle that encloses the lens or isolated form the lens via a sacrificial cover glass. The gas jet is in parallel with the beam and the lens is kept free of contamination due to the cavity in the nozzle being at a high positive pressure. Sounds like you assist jet is external and designed to be aligned with the focal point of the beam. Even tough you have a cheap setup, doesn't mean you cant tweak it to perform better.
check your Focal length and focus height. If you have a very short focal length the the beam is very fat a few mm or less from sharp focus. Try to get sharp focus at the center line of your material and see how that cuts. Worse case is you will need to compensate for the depth of the bevel in your cad program and then sand it down. If you can, go for a longer focal length lens. Another idea is to check the air assist pressure, might be too low. At work we typically run 5.5 - 7 bar (~80-100 psi). Big cutting shops run really high pressure, upwards of 34 bar or more. BTW, focal length is from the center line of the lens so measure from there. Our lenses range from 100mm to 300mm depending on what we need the beam to do.
Reference: I work in an electron beam and laser welding/cutting shop.
su is not only for root. it has a dual purpose: switch user or super user. Sometimes you might have to run a command as another user. So if you need to login as Gary you $su gary and type in Gary's password.
You want horrible? Try the fact that the Acer laptop my grandmother bought and then have to me after she decided computers weren't her thing has a severely limited BIOS. I can't control any CPU features such as enabling Intel vt or controlling hyper threading. Nothing. Just the boot order and a few other basics. Never have I been so pissed at a piece of hardware. That last line may be a lie.
My micron 486 came with a factory CD contrasting containing windows 3.1 and DOS 6.22. They also supplied a boot disk to get it all working. Still have the PC and the CD somewhere. Might still even have the boot disk.
Shhhhhhh! Now the hipsters will switch to monotone prison tats as that is way more ironic.
Looks like I will have to replace my Jesus fish with a sawfish. Suppose I'll also switch my window manager just in case.
I misunderstood you due to bad verbiage: "No, current GPU drivers don't use it fully." The driver has nothing to do with enabling the IOMMU.
The IOMMU automatically maps a device into its own virtual address space. This prevents a random device from reading arbitrary memory outside of its virtual space. The kernel then uses a table provided by the IOMMU to figure out where things actually are in physical address space. BUT if a driver for that device allows it to read random memory locations, then there is a problem. I assume this stems from the newer GPGPU and HSA functionality which aims to reduce overhead by allowing the video card to read certain memory locations directly instead of copying.
The driver does not have to enable the IOMMU, that is automatic. The driver lives in kernel space and from there can do what it damn well pleases in terms of reading/writing memory if the developer inserts such functionality. The driver isn't disabling the IOMMU or failing to enable it, it is allowing the malicious code to read arbitrary memory through vulnerabilities at the kernel level. This bypasses the IOMMU, not disables it. The only protection would be to better enforce memory access privileges in the kernel and/or remove the arbitrary memory access problem.
A good analogy would be a quarantine facility with individual outer doors for each room, each of which is occupied by a single patient (a device). Patients can come and go as they please using their doors. But inside the facility, there is a hall which connects all of the rooms via a locked door for each room (IOMMU). Patients cant open that door but someone with a key can (the kernel). From the hall, a nurse can visit any patient(driver). But a patient can not leave the room through the locked door without that nurse. This isolates the patients from each other. *BUT* if the patient fools the nurse into allowing them into the hall, or the nurse allows them to wander out of the door, then all bets are off. That is what is happening here, the malicious code running on the GPU is fooling the nurse (driver) into leaving the room and wandering into another.
The kernel is the weak spot of any OS. It marshals userspace code and prevents it from reading arbitrary memory and segments users. But once inside the kernel, code can do whatever the kernel allows which is pretty much anything. I can write a module that allows arbitrary memory access from userspace if I wanted.
Not sure where you are getting this floppy business from. Virtualbox guest addition tools are loaded from a single CD image. All the driver packages are on that image. Hyper-V also uses a CD image. I have also used VMware in the past and they too used CD images.
Perhaps you are confusing that with the provided floppy controller emulation.
The IOMMU does take care of the DMA problem but I am betting this has something to do with how the GPU kernel talks to the OS kernel. The OS controls memory so perhaps some driver exploit fools the kernel into reading the wrong memory. The GPU says hey I need this memory and since the GPU driver lives in kernel space, it's possible it could randomly read protected memory.
The IOMMU solved this by even giving each IO device its own virtual IO memory space. So no, the GPU can't randomly read protected memory. Nvidia and AMD don't have to implement anything as this is the job of the IOMMU, not the endpoint device itself.
This was the same problem with the Firewire DMA exploit. Essentially before the IOMMU it was possible for any PCI card to randomly read any memory it wanted to. Firewire being a memory mapped serial bus, easily allowed DMA access to a running or crashed machine. It was used for Linux kernel debugging because even if the kernel crashed taking out the machine, the other I/O subsystems were still functional. You could still dump the contents of RAM to another PC to analyze what went wrong.
Runs circles around how exactly?
Progress!
Nah, it's just ignorance. The average person doesn't understand how diesel differs from gasoline. All they know is it goes into a vehicle and makes it run, just like gasoline. So I assume they just wind up calling any fluid that goes into a fuel tank, gas.
Hell I bet if you asked the average person what diesel is a likely answer might be "gas for trucks".
Are you looking for a diy or a more off the shelf setup?
More like the corporate types don't like competition.
Yea. Because same team.