cpu temps too high

[Chris Lansdown]

When I upgraded from hardy (8.04) desktop to intrepid (8.10) desktop, my CPU temperatures got much higher. Looking at the output of sensors (from the lm-sensors package), it seems like the CPU fan speeds are much slower, and never ramp up very high. On my Core 2 Duo, when I run something CPU-intensive, the temps hit 98C while the fan never breaks 2000RPM. This is a Core 2 Duo 3.0GHz with the regular intel fan. This never used to happen with hardy; the fan would speed up when something CPU-intensive was going on.

I never configured pwmconfig to manage the sensors, don't have an /etc/fancontrol.conf, and never did anything to try to control the fan speed.

Obviously this isn't enough information to do anything, but I don't know what new information to give.

uname -a:
Linux wayreth 2.6.27-7-generic #1 SMP Thu Oct 30 04:12:22 UTC 2008 x86_64 GNU/Linux

Thanks for any help that you can give me.

[Denis Sitnitsa (zeroed)]

I have the same problem as you

http://ubuntuforums.org/showthread.php?t=989124

[Leann Ogasawara (leannogasawara)]

Hi Guys,

Does this issue remain with the more recent Jaunty 9.04 release which contains a 2.6.28 based kernel - http://www.ubuntu.com/getubuntu/download . Please let us know. Thanks.

[stlubuntu (jlrbennett)]

Linux ACERLAPTOP 2.6.24-24-generic #1 SMP Sat Aug 22 00:30:49 UTC 2009 x86_64 GNU/Linux

Cooling fan does not turn on when it should while in screen save (or powersave screen off) causing an overheat and safety shutdown of laptop at 95 degrees C.

Acer Aspire 5100 laptop running 64-bit Ubuntu 8.04.3 LTS. 1 MG RAM 2 Mhz dual core AMD processor (Turion 64-bit), acpi 0.09-3ubuntu1, acpid 1.0.4-5ubuntu9.3, acpi-support 0.109-0hardy2.

This is a new issue. This machine has been running 64-bit Ubuntu 8.04 since April 2008 and this problem only recently began to occur. I would expect the fan to be turned on when necessary even when in screen saver or monitor powersave off mode to keep the cpu within acceptable operating parameters. This being a new issue is why I am not attributing this to a hardware issue and am wondering if a recent update caused a regression.

My temporary workaround is I installed a cpu temperature monitoring applet which resides on my upper panel and not only displays the current temperature but also sounds a repeating alarm whenever the cpu temp exceed 72 C.

I can reproduce this by leaving the machine alone and allowing it to go into screensaver and after some time the alarms will sound. Once I wiggle the mouse the fan will then turn on and bring the temperature back to acceptable levels.

While using the computer normally, I notice that it usually operates in the mid 50's C and the fan will turn on when it reaches 63 C and bring it back to the mid fifties.

This also occurs while playing a youtube video in firefox (currently running Shiretoko 3.5.4pre.) Again, temporary workaround is to close the tab playing the video and temperature returns to normal operating range.

Updated BIOS to v3.13. Problem persists.

From other bug reports, yes this problems exists from Hardy through Jaunty kernels.

All posters are having great difficulty getting any developer to take these reports seriously. Sorry, but we really need more diagnostics than try a new kernel. 8.04 is LTS and is supposed to be supported as such.

[Launchpad Janitor (janitor)]

[Expired for acpid (Ubuntu) because there has been no activity for 60 days.]