Comment 70 for bug 751689
Revision history for this message
| Kartoch (kartoch) wrote Re: ThinkPads overheat due to slow fans when on 'auto' | #70 |
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0e1f616
(Get the code!)
The bug still affects ubuntu users with the latest release 12.04. My PC reboots after one minute of high CPU usage due to excessive heat (> 100°C). But I'm not sure it's only a problem with fan control.
I found several interesting things:
* whatever is the fan speed (disengaged and set manually to full speed with level 127) my PC still reboots after several minutes of high CPU (I didn't have this problem before 11.10)
* a full battery lasts half of the time (2h to 3h), compared to what it was with ubuntu < 11.10 (~5h)
* looking with powertop, I see
* in frequency stats: the turbo mode of both CPU are usually equal to 33% (without no high CPU usage from my applications)
* in device stats: lot of my PCI Device are running at 100%, which seems important
So I think we deal here with several bugs, one about the fan, but also one possibly with ASPM, which seems disabled on my computer:
$ dmesg | grep ASPM
[ 0.160380] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
Finally, I cannot say about openint the laptop and trying to remove the dust, as the computer belong to my work with guaranty yada yada.