Bug#515125: general: cpu frequency scalling crashes my system
On Thu, Feb 19, 2009 at 10:07:23AM +1100, Hamish Moffatt wrote:
> On Fri, Feb 13, 2009 at 08:13:45PM +0100, Mark Poks wrote:
> > 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.
>
> Hi Mark,
>
> I had similar problems with my AMD64 system. Whenever frequency scaling
> was enabled the machine would crash within a few hours of operation,
> even when it was idle. The kernel would oops a few times before finally
> locking up.
>
> I also saw video and database corruption, but generally the system was
> stable.
>
> The problem was a BIOS bug. It started when I increased my system RAM to
> 4 DIMMs. The CPU (AMD64 939 pin x2 4800) can't handle 4 DIMMs at the
> full speed of 400MHz; the BIOS is supposed to automatically slow the RAM
> down to 333MHz in this case, but that didn't work on my Gigabyte K8NS
> Ultra 939. I slowed the RAM down manually and the system is now
> perfectly stable.
>
> Maybe something like this is happening to you too. Memory tests did not
> show any fault by the way.
Mark, does the issue still manifest itself with more recent kernel
versions?
Cheers,
Moritz
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