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Bug#515125: general: cpu frequency scalling crashes my system



Package: general
Severity: important

i am not sure what exacly causes the problem. it maight be cpufreq, or kernel
or maybe something else (or CPU Frequency Scalling Monitor applet in GNOME
which is rather in doubt).

when enabled "AMD Quiet'n'cool" in BIOS (the CPU frequency scalling) and have
installed CPUFreq package, it very often happens that system crashes totally.

it happens estimatelly 0.5-3 times per a day (0.5 means once per two days) that
my machine freezez (and the only way left is hard reset), or resets suddenly,
or my X server crashed (that happen once) and some stack-trace was in console.
one moment later machine had 'self-reset', so i couldn't note that stack.

i am observing the problem for year or even longer (on few different kernels),
but reporting now because i have just discovered that crashes are caused by
frequency-scalling. when "AMD Quiet'n'cool" is disabled in BIOS, nothing
bad happens to the system, i.e. no crashes are occuring.

crashes happen when doing some suddenly actions which need to
rise-up cpu-frequency, such as compiling, or starting application that
needs much of cpu-resources at a time. when system is just up, but has
no any user action, or when watching movie, nothing bad happens.

cheers.


-- System Information:
Debian Release: 5.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-1-686-bigmem (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash



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