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Thread: Talk Of A "Massive Power Regression" In Linux 3.5

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  1. #1
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    Default Talk Of A "Massive Power Regression" In Linux 3.5

    Phoronix: Talk Of A "Massive Power Regression" In Linux 3.5

    For at least some hardware, it looks like the Linux 3.5 kernel has regressed and is burning through noticeably more power than its predecessor...

    http://www.phoronix.com/vr.php?view=MTE0OTg

  2. #2
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    Exclamation

    I can see these power issues are becoming a major problem for Linux in general. It's hard to say to Windows users: "hey, this software is free, but you'll get an hour less of battery life". This is simply not acceptable, no matter how you twist it.

    I know the troubles involved in making progress (uncooperative companies, undocumented protocols, closed-off hardware, etc.), but this is something that we as a community need to put pressure on. I don't know who, or which influential company, will need to fire the first salvo, but it's something that's got to be done to make hardware manufacturers realize the seriousness of the issue.

  3. #3
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    Ah. I was wondering when we would get another power regression. Anyone want to make bets on how many kernel versions will pass before it is fixed? My bet is 4.

  4. #4
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    Quote Originally Posted by ua=42 View Post
    Ah. I was wondering when we would get another power regression. Anyone want to make bets on how many kernel versions will pass before it is fixed? My bet is 4.
    i bet some lazy kernel dev will push the big red button named "fix da driver" in the next month TROLL

    is impressive like some ppl like minimize or have fun [blessful ignorance] of how massive can be fix some "trivial" bug in an inmensively complex piece of software like a kernel driver and the affected subsystems

  5. #5
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    Switching between 3.2 and 3.4 (debian kernels) I have the impression that already 3.4 chews through more power than 3.2. Power efficiency really needs more attention from guys like Intel or RedHat or google.

  6. #6
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    TBH i was expecting that someone (someone on the kernel team that is) would be testing for that kind of regressions over the rc cycle.

  7. #7
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    Quote Originally Posted by 89c51 View Post
    TBH i was expecting that someone (someone on the kernel team that is) would be testing for that kind of regressions over the rc cycle.
    well imagine is happens only with atom cpu but with a bugged motherboard from zotac to put an example but it doesn't happen with an intel board, so you need that ppl with this specific setup report the bug [not just whine about it in a forum unrelated to kernel development], unlike many ppl here think kernel developer don't practice witchcraft or divination and you can't realisticly expect them to test every possible combination of hardware know to men without have release an stable kernel every 15 years

    so yes reporting those bugs in bugzilla[google: kernel bugzilla] make a huge diference and is actually the bigger step needed to fix those issues

  8. #8
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    Quote Originally Posted by not.sure View Post
    Switching between 3.2 and 3.4 (debian kernels) I have the impression that already 3.4 chews through more power than 3.2. Power efficiency really needs more attention from guys like Intel or RedHat or google.
    well you can contribute too generating a bug in bugzilla so the kernel developers can try to find out where is the issue[note sometimes is distros that screw some pm settings].

    try to describe fully wich distro/kernel/hardware you use when posting

  9. #9
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    Quote Originally Posted by not.sure View Post
    Switching between 3.2 and 3.4 (debian kernels) I have the impression that already 3.4 chews through more power than 3.2. Power efficiency really needs more attention from guys like Intel or RedHat or google.
    Why don't the debian devs try and fix it?
    Red Hat and Google and Intel have their own priorities and power management might not be at the top of stack. Debian, being composed of volunteers, can more easily choose what they work on.

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