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Linux 3.1 Kernel Draws More Power With Another Regression

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  • ua=42
    replied
    Arg

    I sometimes wonder what the guys in charge of the kernel think. Do they think that battery powered devices are such a small segment of the market that they shouldn't bother with critical bug issues involving power consumption? ARRggggg. It is sad that I'm having to use windows when I'm on the go because of battery life under Linux is shrinking.

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  • Drago
    replied
    Originally posted by Welsh Dwarf View Post
    Any chance of bisecting these bugs using PTS?
    Yes, probably he will do that. But why some of biggest Linux players don't do that. IBM, Google, RedHat? Where are you?

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  • Welsh Dwarf
    replied
    Any chance of bisecting these bugs using PTS?

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  • btux
    replied
    Luckily the power regression on sandybridge hardware can be worked around easily by adding i915.i915_enable_rc6=1 to the kernel command line.
    See bug report for fedora 15: https://bugzilla.redhat.com/show_bug.cgi?id=727579

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  • phoronix
    started a topic Linux 3.1 Kernel Draws More Power With Another Regression

    Linux 3.1 Kernel Draws More Power With Another Regression

    Phoronix: Linux 3.1 Kernel Draws More Power With Another Regression

    If you were hoping that the Linux 3.1 kernel would fix the big power regression problem that's caused by PCI Express Active State Power Management (ASPM) being disabled on more systems since the release of the Linux 2.6.38 kernel, you're not in luck. There has not been any active work in this area. Making things worse though for mobile Linux users interested in a long lasting battery is another new regression in the Linux 3.1 kernel. Affected systems can easily see a 30% increase in power consumption simply when comparing the Linux 3.0 kernel to the current code being assembled for Linux 3.1. For an Intel Sandy Bridge notebook, the power consumption is up by 76% just over the course of this year from Linux kernel regressions.

    http://www.phoronix.com/vr.php?view=16319
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