[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)
  
  Workarounds:
  -----
  
  In some cases loading some additional kernel modules seems to work around the problem.
  http://ubuntuforums.org/showthread.php?s=cb341b218b0f159c552006cac37a6632&t=1312317
  
  Comment #308 points out that with ati graphics cards supported by fglrx
  driver you can disable its acpi functions as a workaround.
  
  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/

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