[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 #30 from Alex Deucher <agd5f at yahoo.com> ---
(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.

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