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Bizarre Droid Auto-Focus Bug Revealed

itwbennett writes "Pity the poor engineer who had to find this one. One of the more interesting of the handful of bugs that have appeared since the launch of Verizon's Droid smartphone has to do with the on-board camera's auto-focus. Apparently it just didn't work. And then suddenly it did. Naturally, this off-again, on-again made the theories fly. But the real reason for the bug was revealed in a comment on an Engadget post by someone claiming to be Google engineer Dan Morrill: 'There's a rounding-error bug in the camera driver's autofocus routine (which uses a timestamp) that causes autofocus to behave poorly on a 24.5-day cycle,' said Morrill. 'That is, it'll work for 24.5 days, then have poor performance for 24.5 days, then work again. The 17th is the start of a new 'works correctly' cycle, so the devices will be fine for a while. A permanent fix is in the works.'"

42 of 275 comments (clear)

  1. Does it use an Intel CPU? by Jailbrekr · · Score: 1, Funny

    Just curious.....

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    Feed the need: Digitaladdiction.net
    1. Re:Does it use an Intel CPU? by Bakkster · · Score: 4, Funny

      Read and be enlightened.

      Of course my favorite joke about the matter:
      Q: "How did Intel decide to name the 586 processor?"
      A: "They took 486, added 100, and came up with 585.999999999999824"

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  2. Auto-Focus by kellyb9 · · Score: 5, Funny

    ... Droid doesn't

    1. Re:Auto-Focus by Anonymous Coward · · Score: 1, Funny

      Erm. Actually, Droid DOES. Just not all the time... I suppose that's not as funny, though, so may I recommend:

      "Sporadically bugs: iDoesn't. Droid does."

    2. Re:Auto-Focus by josteos · · Score: 5, Funny

      ... Droid might

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    3. Re:Auto-Focus by hippo_of_knowledge · · Score: 2, Funny

      I would have expected a Schrodinger's camera joke by now. Step up your game, Slashdot.

    4. Re:Auto-Focus by Mike+Buddha · · Score: 3, Funny

      "Sporadically bugs: iDoesn't. Droid does."

      Yeah, tell that to the iPhone browser next time it shits out without warning. iDoes, too.

      --
      by Mike Buddha -- Someday the mountain might get him, but the law never will.
  3. In case you were worried.... by EdIII · · Score: 5, Funny

    Spring Break, the biggest part of it, occurs within a working cycle.

    1. Re:In case you were worried.... by Anonymous Coward · · Score: 1, Funny

      But does is coincide with the monthly cycle of the subjects likely to be photographed by these Droids? ;-)

  4. Alleged... by Anonymous Coward · · Score: 5, Funny

    by someone claiming to be Google engineer Dan Morrill

    Yeah, it could also be one of those lame Dan Morrill impersonators who solve perplexing engineering/programming issues, then post the solution under his name. MAN that's annoying..

    1. Re:Alleged... by Ragzouken · · Score: 4, Funny

      You have some interesting points, person, posting using Artraze's account, on a website my DNS tells me is slashdot.org.

  5. "Not waiting long"? by Singularity42 · · Score: 5, Funny

    I've been waiting a long long time for standardization of integer types.

    1. Re:"Not waiting long"? by Anonymous Coward · · Score: 5, Funny

      Yeah? Well, I've been waiting an unsigned long long time for standardization of integer types. Twice as long!

    2. Re:"Not waiting long"? by Anonymous Coward · · Score: 3, Funny

      me love ulong time

  6. iFocus ... NOT by OzPeter · · Score: 4, Funny

    This is definitely NOT the Droid you are looking for

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  7. Simple solution by Anonymous Coward · · Score: 3, Funny

    Just buy two with opposing date stamps.

  8. Re:When Signed/Unsigned Strikes by Whalou · · Score: 5, Funny

    Hopefully we're not waiting long.

    We're waiting unsigned long.

    --
    English is not this .sig mother tongue...
  9. Wow by QuoteMstr · · Score: 3, Funny

    Considering that a lunar cycle is 29.5 days long, we've actually found a bug that depends (approximately) on the phase of the moon!

  10. Re:When Signed/Unsigned Strikes by rsborg · · Score: 5, Funny

    Hopefully we're not waiting long.

    We're waiting unsigned long.

    As long as it's not a justin long... he's already signed.

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  11. Re:When Signed/Unsigned Strikes by Anonymous Coward · · Score: 5, Funny

    Waiting long? Hopefully we're not waiting double!

  12. Re:IIRC, this is the same sort of bug by NoYob · · Score: 5, Funny
    Huh. I ended up giving my Win 95 box a woman's name and just chalked it up to "that time of the month."

    I didn't realize there was a real software reason for it.

    I wonder if there's a way to do the same for my wife - you know, fix a software bug.

    Gotta run she's home!

    --
    It's NOT me! It's the meds! I'm on 1000mg of Fukitol.
  13. A permanent fix by MisterZimbu · · Score: 2, Funny

    "'There's a rounding-error bug in the camera driver's autofocus routine (which uses a timestamp) that causes autofocus to behave poorly on a 24.5-day cycle,' said Morrill."

    Cool! The device will later be fixed to properly behave poorly only every 24.45 days!

  14. Re:Rounding error? by Anonymous Coward · · Score: 4, Funny

    In excusable. The industry is too mature for that type of shit.

    Spelling error? Inexcusable. The English language is too mature for that type of shit.

    (In case you missed it, your argument has just as much validity in the real world due to differences in people.)

  15. Re:When Signed/Unsigned Strikes by nhytefall · · Score: 4, Funny

    WRONG FOCUS...

    Sounds like you are on the wrong end of the 24.5 day cycle :)

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    0100010001101001011001 0100100000011010010110 1110001000000110000100 1000000110011001101001 0111001001100101
  16. Schrodinger's Auto-Focus by Dareth · · Score: 4, Funny

    It is necessary to have some radioactive elements in your phone for it to focus.

    PS, it may or may not also kill cats!

    --

    I only look human.
    My mother is a halfling and my dad is an ogre, so that makes me an Ogreling
  17. Re:Time-releated bugs by qoncept · · Score: 4, Funny

    I got a "bug report" that our Oracle Forms app would give an undefined error message after you "type in a first name, push tab twice, and click save 17 times." I didn't debug it, but I did offer a workaround.

    I also had a bug report for when you tried to add a prerequisite that didn't exist to a training task (the system tracked flight Air Force crew training and experience), an error would pop up that said "All this time and it still doesn't work..." In that case, apparently debugging was as far as anyone ever got.

    --
    Whale
  18. Re:A timestamping overflow error by ground.zero.612 · · Score: 5, Funny

    Congratulations. You are among the few (but growing in number) who not only can't RTFA, but lack the attention span or comprehension skills to read the summary itself.

    MTV has a network for you.

    Is that network called MTV?

    --
    "Be prepared, son. That's my motto. Be prepared." --Joe Hallenbeck
  19. Re:IIRC, this is the same sort of bug by kalirion · · Score: 4, Funny

    Same timeframe? You could actually keep a Win 95 system up and running for 24 days?

  20. I must have the same bug... by Gavin+Scott · · Score: 4, Funny

    After about 42 years my auto-focus suddenly stopped working as well.

    You think if I live to 84 or so it will suddenly get better again?

    I sure hope there's a patch...

    G.

    1. Re:I must have the same bug... by bennomatic · · Score: 5, Funny

      Unfortunately, applying a patch causes the loss of depth perception.

      --
      The CB App. What's your 20?
    2. Re:I must have the same bug... by AcidPenguin9873 · · Score: 5, Funny

      And increases one's propensity for rum, parrots, and the letter R.

  21. Re:IIRC, this is the same sort of bug by Zero__Kelvin · · Score: 2, Funny

    I don't believe that one was ever seen in the wild, since Windows 95 also had several bugs that caused it to require a reboot approximately every 24.5 minutes ;-)

    --
    Guns don't kill people; Physics kills people! - John Lithgow as Dick Solomon on Third Rock From The Sun
  22. Re:When Signed/Unsigned Strikes by Abstrackt · · Score: 5, Funny

    Sounds like you are on the wrong end of the 24.5 day cycle :)

    That's what my wife keeps telling me. :(

    --
    They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance. - Terry Pratchett
  23. Patriot's Ghost by Tablizer · · Score: 3, Funny

    Hmmm, did the auto-focus programmer used to work on the Patriot anti-missile system?
       

  24. Re:When Signed/Unsigned Strikes by Fael · · Score: 5, Funny

    Under most circumstances, you would be correct. However, there are certain situations under which it is grammatically correct to omit the final mark of punctuation: when a speaking character is defenestrated mid-dialogue; when the narrator has just discovered himself to be his own grandpa; and (as is clearly the case in the grandparent post) when quoting the first line of a limerick:

    Wish I had mod points, this entire thread is one of the funniest ever on /.
    Second quite possibly only to last week's delightful essay on the breakdancing robot
    Of course it would be
    somewhat remiss of me
    Not to mention that I find most everything hilarious because I just don't get out a whole lot.

  25. Re:When Signed/Unsigned Strikes by Anonymous Coward · · Score: 1, Funny

    Our jokes aren't like your jokes

  26. Mother said there would be days like this by Cryacin · · Score: 4, Funny

    Woke up today, and just can't focus!!!

    --
    Science advances one funeral at a time- Max Planck
  27. Re:When Signed/Unsigned Strikes by Anonymous Coward · · Score: 2, Funny

    Ahh, but what if it's someone *else* who has to go back and change your clever algorithm next year? Surely after he figures it out he'll be pleasantly impressed and grateful for the challenge you so kindly provided.

    This is why I don't comment my code.

  28. Re:New Moon? by Ksevio · · Score: 2, Funny

    So since January 1st, 1970?

  29. Re:When Signed/Unsigned Strikes by Jarik+C-Bol · · Score: 5, Funny

    Yes, but on the other hand, piss off you pedantic bastard.

    --
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  30. Re:When Signed/Unsigned Strikes by StikyPad · · Score: 5, Funny

    Word.

  31. Uh... by msauve · · Score: 3, Funny

    It was a single line comment. No terminator necessary.

    --
    "National Security is the chief cause of national insecurity." - Celine's First Law