[Bug 370173] Re: Ubuntu 9.04 laptop overheat and shutdown

[ceg]

** 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:
  -----
  try:
  # sudo apt-get install stress
  # stress --cpu 16 --vm 2 --vm-bytes 128M
  
- But it may also be the graphics card (gpu), connected to the same heat
- sink as the cpu, that causes the shutdown. (gpu overheating while cpu
- fan is not running fast enough)
+ But it may be the graphics card (gpu), connected to the same heat sink
+ as the cpu, that causes the shutdown. (gpu only overheating when cpu fan
+ is not running fast enough)
+ 
  
  Workarounds:
  -----
  Make sure heatsink is not dusty (Pressured air/vacuum at own risk).
  
  In some cases loading some additional kernel modules seemed/used 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 fglrx
  driver you can disable its acpi functions as a workaround.
  
+     Possible /etc/X11/xorg.conf for non-fglrx users:
+ 
+         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 has no acpi and does
  not suffer from this bug, as well as to a blog post linking to
  summaries. http://designbygravity.wordpress.com/2009/12/01/how-linux-
  almost-drove-me-to-windows-xp/
  
  Comment #328 points out in other cases updating BIOS to latest version
  and adding "acpi.power_nocheck=1" option to boot line may help.

-- 
Ubuntu 9.04 laptop overheat and shutdown
https://bugs.launchpad.net/bugs/370173
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