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There's Another Linux Kernel Power Problem

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  • #16
    I am unafected by this bug

    t5800 laptop


    same battery life I have in 3.2 I have in 3.7


    therefore following the logic of the pallidus ("that that does not affect me does not exist") I conclude this is of very minor importance

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    • #17
      There's some discussion about this topic (and lots of affected users and some solutions, which seem to be only to be included in 3.8) described at the archlinux forum:

      https://bbs.archlinux.org/viewtopic.php?id=150743

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      • #18
        Originally posted by BO$$ View Post
        Is it just me or the kernel is becoming more and more buggy? I mean these regressions happen every month now...
        No. It's just that no one found/reported them years ago.

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        • #19
          If anyone remembers, there is another power regression in the kernel before the PCIE power regression. That is still to be corrected.

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          • #20
            Originally posted by mayankleoboy1 View Post
            If anyone remembers, there is another power regression in the kernel before the PCIE power regression. That is still to be corrected.
            Now if only they'd fix those before adding new features... perhaps a "bugfixes only" release.

            In the meantime... many affected computers around the globe running linux * amount of wasted energy = huge amount of wasted energy.

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            • #21
              I have a HP Pavilion DV6 model 6173CL and I have this bug in all kernel version :-(

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              • #22
                as strange as it seems I might have spoken too much too soon.


                So I was just using this hardened gentoo thing with tor (I do engage in youtube trolling form time to time), and suprisingly enough the battery lasted much longer than ubuntu 13.04 did...


                as unscientific as it is I confirm the power regression affects all laptops

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                • #23
                  As always Larabel is [ full of crap ].

                  $ uname -a
                  Linux ultek 3.6.9-1.fu2013.x86_64 #1 SMP Sat Dec 8 07:26:15 EST 2012 x86_64 x86_64 x86_64 GNU/Linux
                  $ sudo dmidecode -s system-version
                  ThinkPad T420

                  7.31 Watts, and 12 hours of battery life remaining using kernel 3.6.9. This is the same sky is falling story he reported in 2011 that I also [ thoroughly debunked ] this time with a slightly different flavor. Move on folks, there is nothing here to see.

                  The only thing important to Michael seems to be ad revenue.

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                  • #24
                    Originally posted by fahrenheit View Post
                    There's some discussion about this topic (and lots of affected users and some solutions, which seem to be only to be included in 3.8) described at the archlinux forum:

                    https://bbs.archlinux.org/viewtopic.php?id=150743
                    "Nothing to see here" ? What about this?

                    Comment


                    • #25
                      Originally posted by fewt View Post
                      As always Larabel is [ full of crap ].

                      $ uname -a
                      Linux ultek 3.6.9-1.fu2013.x86_64 #1 SMP Sat Dec 8 07:26:15 EST 2012 x86_64 x86_64 x86_64 GNU/Linux
                      $ sudo dmidecode -s system-version
                      ThinkPad T420

                      7.31 Watts, and 12 hours of battery life remaining using kernel 3.6.9. This is the same sky is falling story he reported in 2011 that I also [ thoroughly debunked ] this time with a slightly different flavor. Move on folks, there is nothing here to see.

                      The only thing important to Michael seems to be ad revenue.
                      Results from one kernel, without comparison to an earlier kernel, and without full detailed hardware info, are meaningless. Also, what about the kernel bug linked twice already in this thread?

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                      • #26
                        It won't affect Michael's Core i5-2520M or Lederhosen's Asus X53E with the Sandy Bridge graphics or gururise's Sandybridge machine, but kernel 3.7-rc8 has disabled rc6 on Ironlake again.

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                        • #27
                          Originally posted by fewt View Post
                          As always Larabel is [ full of crap ].

                          7.31 Watts, and 12 hours of battery life remaining using kernel 3.6.9. This is the same sky is falling story he reported in 2011 that I also [ thoroughly debunked ] this time with a slightly different flavor. Move on folks, there is nothing here to see.

                          The only thing important to Michael seems to be ad revenue.
                          Just like with the previous bug, your results are invalid for the general case, because you use some weird power thing, not the default configuration.

                          It so happens that most users will use the defaults, not the weird power thing. So the default tests carry much more value than tests with some custom config.

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                          • #28
                            Originally posted by madbiologist View Post
                            Results from one kernel, without comparison to an earlier kernel, and without full detailed hardware info, are meaningless. Also, what about the kernel bug linked twice already in this thread?
                            Since I'm the author of Jupiter and also the maintainer of my distributions kernel, I test dozens of kernels a year - as do other members of my team. For example I personally tested 3.6.7 last week and 3.4.19 a week or so before that. The kernel bug linked twice in this thread is a different problem - and not what Larabel reported.

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                            • #29
                              Originally posted by curaga View Post
                              Just like with the previous bug, your results are invalid for the general case, because you use some weird power thing, not the default configuration.

                              It so happens that most users will use the defaults, not the weird power thing. So the default tests carry much more value than tests with some custom config.
                              My tests aren't invalid - as I have said many times, the kernel isn't responsible for tuning itself for power management.

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                              • #30
                                Originally posted by madbiologist View Post
                                Results from one kernel, without comparison to an earlier kernel, and without full detailed hardware info, are meaningless. Also, what about the kernel bug linked twice already in this thread?
                                Specs:

                                Processor: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz
                                Memory: 8192MB
                                Hard Drive: Seagate Momentus 7200 250GB (ST9250412AS)
                                Video: Intel(R) Sandybridge Mobile (GT2+)
                                Network: Intel Corporation 82579LM Gigabit Network Connection, Intel Corporation 6000 Series Gen2 (uses 1 watt)
                                OS: Fuduntu 2013.1
                                Desktop: GNOME 2
                                Display Driver: Intel 2.20.10
                                OpenGL: Mesa 8.0.4
                                Compiler: GCC 4.6.3
                                Filesystem: ext4
                                Resolution: 1600x900

                                ...

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