Jean Jordaan - Which version of Ubuntu are you using? Can you paste the output of uname -srm. Please also attach the output of lspci -vvnn and sudo dmidecode
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/370173 Title: laptop overheats and suddenly shuts down/off Status in Linux ACPI client: New Status in acpid: New Status in cpufreqd: New Status in The Linux Kernel: Expired Status in lm-sensors - Utilities to read temperature/voltage/fan sensors: New Status in “linux” package in Ubuntu: Won't Fix Status in “acpi” package in Debian: New Bug description: Ubuntu 9.04, fresh install on Acer Aspire 5005 / Toshiba Satellite. (confirmed also with 9.10 and 10.04) Not sure about package, but it seems the problem is: * with CPU frequency adjustment, * fan control, * thermal sensors, * control of cooling itself. 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@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 also: AMD Turion Ultra 64 X2 RM-80 @ 2.1 GHz, AMD Turion 64 X2 TL-60, Intel(R) Celeron(R) CPU 540 @ 1.86GHz ----- 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 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: Hint 1: Make sure the heatsink/vent system is not dusty. (Do clean it with pressured air/vacuum at own risk.) Hint 2: 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. Comment #308 points out how with ati graphics cards supported by the fglrx driver you can disable its acpi functions as a workaround. Bug #488152 and Bug #570589 deal with the many ATI cards that overheat. An 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. Comment #328 hinted that adding the "acpi.power_nocheck=1" AND "acpi_osi=linux" boot options can help, if your (updated) BIOS supports it. (Making nocheck=1 the default was proposed https://patchwork.kernel.org/patch/23156/ but it is not upstream as of april 2010.) --- If your fan does not start at all, but in emergency overheating conditions, you may be seeing an (source code wise) unrelated issue/bug, that can be worked around however by the same acpi.power_nocheck=1 boot option as well, though. (Or by staying 10 seconds or so in the grub boot menu until the fan starts controlled by the bios can help.) To manage notifications about this bug go to: https://bugs.launchpad.net/acpi/+bug/370173/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
