** 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: c...@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 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 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. ---- 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" option to boot line may help. (seems fixed - upstream https://patchwork.kernel.org/patch/23156/) + "acpi.power_nocheck=1" option to boot line may help. (Making this + default was proposed https://patchwork.kernel.org/patch/23156/ but it is + not upstream as of april 10) - 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. + With fans not turning on, 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 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
