[Bug 72921] DPM Power Cycle with AMD A8-6600K & MSI FM2-A55M-E33

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72921

--- Comment #30 from Kertesz Laszlo <laszlo.kertesz at gmail.com> ---
I activated bapm on my A8-6500 (on a GA-F2A88X-D3H mobo).
It is working as advertised - the CPU reached its 4GHz turbo core speed and was
working between 3.5GHz(nominal top speed) and 4GHz for quite long time periods.
Actually, from a performance point of view, this is the best so far (Catalyst
had some nasty CPU slowdowns, not seen in /proc/cpu).

Now, the problems - about once a day the computer reboots suddenly. Every time
my wife was playing some flash based Facebook game BTW. Using other stuff, even
playing 3D games or using VDPAU acceleration didnt seem to create problems.

Also, i observed this in the system log:

[  299.812285] mce: [Hardware Error]: Machine check events logged

/var/log/mcelog has these:

mcelog: failed to prefill DIMM database from DMI data
mcelog: Unknown CPU type vendor 2 family 15 model 3
Hardware event. This is not a software error.
MCE 0
CPU 0 BANK 4
ADDR feb0c114
TIME 1404369155 Thu Jul  3 09:32:35 2014
STATUS b600000000070f0f MCGSTATUS 0
MCGCAP 107 APICID 0 SOCKETID 0
CPUID Vendor AMD Family 21 Model 3

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