[Bug 69723] GPU lockups with kernel 3.11.0 / 3.12-rc1 when dpm=1 on r600g (Cayman)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69723

--- Comment #47 from Alexandre Demers <alexandre.f.demers at gmail.com> ---
Latest news: tried to force VDDC to 1100 (some 6950 cards are using 1.1V
instead of 1.06V, mostly factory overclocked ones), tried to force VDDCI to
1150 for all power levels (crashed even quicker), tried to force VDDCI to 1100
for high power level just in case (hanged as usual after mostly the same
delay).

So I turned my attention on mclk and downclocked it to 120000 (instead of
125000). Until now, the auto power level runs fine. I'll tweak it until I can
find out at which value it begins to hang... and why it hangs mostly on auto
power level and almost never on high or low (even at high, which is mostly as
if dpm was disabled)... and never under Windows.

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