[SOLVED] ThinkPad R52 overheating ->help acpi fan active

emuller · n00b Joined: 28 Oct 2005 Posts: 23

My ThinkPad R52 fan spins constanly and never speeds up. Even when the CPU temp goes over 80 C during heavy load.

Naturally at this stage the system is very unstable.

installed ibm-acpi, thermal and fan modules but there is no support for active cooling and no fans show up in /proc/acpi/fan.

Do a :
modprobe ibm-acpi experimental=1

and then

in /proc/acpi/ibm/ there are fans but they report disabled, even though the fan is spinning. I enable it and nothing changes. The speed is always like 3435 whatever that means.

How do I get the fans to speed up when the CPU heats up??? Please help!!! A computer that can't handle a load is useless!!!

Phlogiston · Posted: Mon Dec 12, 2005 6:43 pm Post subject:

probably it's not supported by the driver... As it is experimental...
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Workstation: 5.1 SurroundSound, LIRC remote control; Laptop [IBM-T43]: patched sources, s2disk/ram, fingerprint sensor

emuller · n00b Joined: 28 Oct 2005 Posts: 23

After upgrading to 2.6.16 everything is stable with 80C temp reading.

Notes:

1) It was not overheating but something else (perhaps bugs in disk controller drivers in 2.6.12) which was causing instabilities. 2.6.16 is OK

2) BIOS setting seems to override kernel setting. Just set bios to desired config. Enabling THROTTLING in BIOS helps to reduce CPU temp if 80C (no way to verify this reading from kernel is correct) to ~60C
but I have a stable system with MAX CPU (no throttling) which is stable (use kernel 2.6.16) and read 80C under loads.

3) kernel 2.6.12 must have bugs... probably in the disk controller drivers which are causing the instability.

4) Since BIOS seems to control/override everything, it is not serious that fan + temp readings are not supported by ibm-acpi module.

hope this helps you r52 users out there...

Moral of the story... upgrade to 2.6.16 for a stable system!

cheers, e.