[Bug 69723] Computer freezes with kernel 3.11.0 / 3.12-rc1 (with bug 68235's patches applied) when dpm=1 on r600g (Cayman)

[bugzilla-daemon at freedesktop.org]

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

--- Comment #31 from Alexandre Demers <alexandre.f.demers at gmail.com> ---
(In reply to comment #30)
> (In reply to comment #29)
> > Just in case, I went back in time for bisection between v3.11 and v3.10,
> > began at commit 69e0b57a91adca2e3eb56ed4db39ab90f3ae1043 when dpm was
> > implemented on Cayman. I applied patches from bug 68235 so I could run
> > without display hanging. I've been running videos, daily tasks and piglit
> > runs without a crash. I'll move forward and see if I can find something that
> > could help us explain the hangs happening since v3.11.0.
> 
> As I mentioned in bug 68235, with 69e0b57a91adca2e3eb56ed4db39ab90f3ae1043
> the driver did not enable dynamic performance level adjustments since it
> caused hangs. With that commit the GPU always stays in the lowest
> performance level which is why it's stable.  The hangs were fixed by
> 4da18e26e0cc2387597ff57ac33df1bc6369fbed,
> 7a80c2c9a957b1ab056fac235140ebd6c43d9831, and
> 779187f2c3e69b8c06488538e0fd9fd02163359e and dynamic performance levels were
> enabled in commit 7ad8d0687bb5030c3328bc7229a3183ce179ab25.

Yes, I know. I just needed to start with something "solid". If running at the
lowest performances is stable, it gives me a reference. I had time to test
another commit in the branch, but since I'm not at home, I can't say if all the
commits you had identified are in. I'll probably continue tonight.

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