[Bug 370173] Re: laptop overheats and suddenly shuts down/off
ceg
c.gatzemeier at tu-bs.de
Wed Apr 21 18:26:27 UTC 2010
** Description changed:
Ubuntu 9.04, fresh install on Acer Aspire 5005.
(confirmed also with 9.10)
Not sure about package, but it seems the problem is with CPU frequency adjustment or fan control.
Laptop shuts down right in the middle of CPU-greedy operation overheated. I haven't seen it before (since 7.10).
The issue is discussed at several forums (eg. http://ubuntuforums.org/showthread.php?p=7399158 )
*-cpu
product: AMD Turion(tm) 64 Mobile Technology ML-37
vendor: Advanced Micro Devices [AMD]
physical id: 1
bus info: cpu at 0
version: 15.4.2
size: 2GHz
capacity: 2GHz
width: 64 bits
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt x86-64 3dnowext 3dnow up pni lahf_lm cpufreq
-----
Replication:
You can try:
# sudo apt-get install stress
# stress --cpu 16 --vm 2 --vm-bytes 128M
But it may be the graphics card (gpu), connected to the same heat sink
- as the cpu, that causes the shutdown. And the gpu only overheating when
- cpu is not getting stressed/hot and the fan is not running fast enough
- to keep the gpu from overheating.
+ as the cpu, that causes the shutdown. And the gpu will only overheat
+ when cpu is not getting very stressed/hot and thus the fan is not
+ running fast enough to keep the gpu from overheating.
+
+ It may also be reproducable by installing the ubunu alternate CD into
+ virtualbox (without guest additions).
-----
Workarounds:
- First make sure heatsink/vent system is not dusty (Pressured air/vacuum
- at own risk).
+ Hint 1: Make sure the heatsink/vent system is not dusty. (Do clean it with pressured air/vacuum at own risk.)
+ Hint 1: Using your laptop standing on its side or front edge (even if opened), i.e. when it is connected to external monitor etc., can change the heat flow and make parts like the gpu overheat which won't get so hot in normal orientation.
In some cases using some additional kernel modules (or other cpu throttling packages) seem to work around the problem.
http://ubuntuforums.org/showthread.php?s=cb341b218b0f159c552006cac37a6632&t=1312317
Comment #308 points out how with ati graphics cards supported by the
fglrx driver you can disable its acpi functions as a workaround.
A example /etc/X11/xorg.conf to keep the gpu cooler in general is the
following:
Section "Screen"
Identifier "Configured Screen Device"
Device "Configured Video Device"
EndSection
Section "Device"
Identifier "Configured Video Device"
Option "ClockGating" "true"
Option "DynamicPM" "true"
Option "DynamicClocks" "on"
EndSection
Comment #327 points to the "server" edition which does not use acpi and
does not suffer from this bug.
----
- You are seeing another issue if your fan does not start at all, but in emergency overheating conditions:
+ If your fan does not start at all, but in emergency overheating conditions, you are seeing another unrelated issue/bug:
Comment #328 points out updating BIOS to latest version and adding
- "acpi.power_nocheck=1" (https://patchwork.kernel.org/patch/23156/)
- option to boot line may help.
+ "acpi.power_nocheck=1" option to boot line may help. (seems fixed
+ upstream https://patchwork.kernel.org/patch/23156/)
- With this issue also staying 10 seconds or so in the grub boot menu
- until the fan starts controlled by the bios can help.
+ With that unrelated issue also staying 10 seconds or so in the grub boot
+ menu until the fan starts controlled by the bios can help.
--
laptop overheats and suddenly shuts down/off
https://bugs.launchpad.net/bugs/370173
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