Public bug reported:
My laptop goes to very hign temperature. First I think it was a fan
problem. I adjusted thinkfan to use the disengaded option. Now my fan
ist at maximim speed if the temperature goes over 67°C. But still it is
not possible to run the laptop for a longer time an 100% CPU. It then
overheats and stops working. For example just after clamscan starts
working the fan is at maximum speed (5600 revolutions) and the
tempurature goes up over 85°C, the CPU usage is the about 70%.
My standard governer is "ondemand". By using "powersave" the temparure
will be about 5-10°C decrease.
My investigation show me that in my oppinum the VID is to high. To varify this
i do the following:
- rdmsr -p0 [1] 0x0199 for every speed steps
- the governer "ondemand" switches the MSR 0x199 between
- 0x0613, which means 1GHz and 1.275V?
- 0x081c, which means 1,33GHz and 1.3875V?
- 0x0b28, which means 1,83GHz and 1.5375V?
> by 100% CPU the laptop overheats and stops
- set the governer to userspace 1.833GHz
- reduce the VID using: wrmsr -p0 [1] 0x0199 0x0b20
> the temparature goes not over 65°C by starting load that goes to 100% CPU!.
I see that the VID is allways set to 0x0b28 when the governer change the
speed to the highest speed. I don't know if the governer or an other
kernel module set the VID The Sped (FID) is selected by the governer.
The FID/VID vor maximum should be set to 0x0b20 instead 0x0B28 and every
thing would fine.
Here are some infos about my system:
It is a lenovo Thinkpad R60
rainer@BN591-LINUX:~$ sudo lshw -C display; uname -a; lsb_release -a
*-display
description: VGA compatible controller
product: Radeon Mobility X1400
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:16 memory:d8000000-dfffffff ioport:2000(size=256)
memory:ee000000-ee00ffff memory:ee020000-ee03ffff
Linux BN591-LINUX 3.2.0-40-generic-pae #64-Ubuntu SMP Mon Mar 25 21:44:41 UTC
2013 i686 i686 i386 GNU/Linux
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.2 LTS
Release: 12.04
Codename: precise
rainer@BN591-LINUX:~$
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: overheating precise vid
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https://bugs.launchpad.net/bugs/1164557
Title:
Laptop to hot - VID to high
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