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After upgrading to Linux 3.6.2, the fan in my laptop spins constantly. After downgrading to 3.5.6, the fan rarely ever spins audibly.
Anyone else with this problem? Any solutions?
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Compare the output of dmesg and lsmod for both kernels, it could well be that a module has gone missing. please also post these files here so we can have a look. Use a service like http://paste.debian.net/ or https://gist.github.com/ to do so
It would help if we knew which model laptop you own.
Are you using any additional tools to control the fan speed, lm_sensors, a DE tool of some kind, or does it automagically work with 3.5.x
Arch i686 on Phenom X4 | GTX760
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Thanks for the guidance.
It's a Dell Latitude e6520.
I've installed lm_sensors but didn't configure anything and only used it to display temperatures.
laptop-mode-tools is installed and running. As soon as the CPU governor is set to ondemand, the fan only spins under heavy load and instantly stops afterwards. (That is with Linux < 3.6 at least.)
No desktop environment. Just xmonad.
Apart from that, I haven't consciously installed any fan related packages.
lsmod 3.5.6: https://gist.github.com/3892468
lsmod 3.6.2: https://gist.github.com/3892470
dmesg 3.5.6: https://gist.github.com/3892473
dmesg 3.6.2: https://gist.github.com/3892479
Last edited by Markus00000 (2012-10-15 13:41:03)
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same problem here, no solution yet.
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Check your cpu frequency with powertop. It is probably the same issue we are having in the Kernel 3.6.2 Power Regression thread. I urge you to post your information there if that is the case so we can help narrow down what our issues are.
Thinkpad T420 | Intel 3000 | systemd {,--user}
PKGBUILDs I use | pywer AUR helper
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I've looked at the CPU frequencies with both kernels and the situation is the same: All four cores stay at 800 MHz most of the time.
In case that it matters, I didn't use powertop for the readings but Conky and /proc/cpu.
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I've looked at the CPU frequencies with both kernels and the situation is the same: All four cores stay at 800 MHz most of the time.
In case that it matters, I didn't use powertop for the readings but Conky and /proc/cpu.
This my be the same problem we ran into. Try checking your frequencies using
# cat /sys/devices/system/cpu/cpu[0-3]/cpufreq/cpuinfo_cur_freq
because sometimes programs read this file
/sys/devices/system/cpu/cpuX/cpufreq/scaling_cur_freq
instead of the cpuinfo_cur_freq file, the scaling_cur_freq showing the value it should be scaled at, and the cpuinfo_cur_freq showing the value it is actually at.
Thinkpad T420 | Intel 3000 | systemd {,--user}
PKGBUILDs I use | pywer AUR helper
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i think there is a bug in wireless driver : 03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] (rev 34)
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KaiSforza, you are spot on.
# cat /sys/devices/system/cpu/cpu[0-3]/cpufreq/cpuinfo_cur_freq
This returns 2500MHz under 3.6 and 800MHz under 3.5.
Note: The thread KaiSforza mentioned is Kernel 3.6.2 Power Regressions (Sandy Bridge).
Last edited by Markus00000 (2012-10-18 13:26:04)
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This issue is not fixed in 3.6.3. Hopefully this will save others some time. :-)
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