as the title says, the ondemand cpu frequency governor seems to be broken in 3.6.*.
The sympton is that my cpu (i5-something, Thinkpad X220) is constantly set to 2.5 GHz (max) whether I'm on battery or ac.
The cpupower frequency-info command reports 800 MHz (min) which is wrong.
Powertop reports the correct frequencies, as does the sys interface (/sys/devices/system/cpu/cpu?/).
Furthermore I cannot set the frequency manually using /sys/devices/system/cpu/cpu?/cpufreq/scaling_setspeed, which reports <unsupported>.
(That's also true for 3.5, but throttling works here anyway).
I also tried to disable laptop-mode-tools and checked pm-utils (which do not set my cpu frequency).
The only solution for now seems to be a downgrade from 3.6 to 3.5, which I've done.
Thus my conclusion is, that somethings broken with the cpu frequency scaling in 3.6.
Any advise, clues, suggestions?
Thanks and wishes!
elevator=noop pcie_aspm=force i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.i915_enable_fbc=1 iwlwifi.power_save=1 iwlwifi.power_level=5 iwlwifi.11n_disable=1 nmi_watchdog=0 snd_hda_intel.power_save=1 usbcore.autosuspend=1
Last edited by jrk (2012-10-16 10:43:53)
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FYI: I'm using the X220 with an i7 and am not experiencing this issue.
EDIT: I was wrong, I AM experiencing this issue after resuming from suspend (90% of the time, sometimes it does work).
Last edited by trsk (2012-10-18 14:03:33)
i also have X220 i7 and am wondering what kind of configurations you have for powersaving. do you use laptop-mode or tlp?
I'm using laptop-mode-tools but I don't think that's the root of the problem.
Right now, I'm experiencing the behavior with kernel 3.5.6-1 too.
That's odd, I start to think that it might have something to do with the dock I'm using, but I cannot clearly correlate this.
cat /sys/devices/system/cpu/cpu?/cpufreq/scaling_setspeed 800000 800000 800000 800000
cat /sys/devices/system/cpu/cpu?/cpufreq/scaling_cur_freq 800000 800000 800000 800000
cat /sys/devices/system/cpu/cpu?/cpufreq/cpuinfo_cur_freq 2500000 2500000 2500000 2500000
cat /sys/devices/system/cpu/cpu?/cpufreq/bios_limit 2501000 2501000 2501000 2501000
i think there is a bug in wireless driver : 03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] (rev 34)