[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 #32 from Alexandre Demers <alexandre.f.demers at gmail.com> ---
Created attachment 89246
  --> https://bugs.freedesktop.org/attachment.cgi?id=89246&action=edit
journalctl from last couple of boot/hang cycles

This could be interesting:
I've been bisecting. The first usable kernel on Cayman with dpm was between
3.11-rc1 and 3.11-rc2. Before that, the system was unusable (major corruption).
So, with patches from related bug, I was able to start a session and run
applications until it hanged.

On Nov 15 00:19:51, I was booting with a safe kernel (before dpm was enabled,
a144acb).

On Nov 15 00:36:23, I booted with the kernel exhibiting a desired behavior.
Logged, ran tasks, hanged on Nov 15 00:41:03. Segfault in libLLVM-3.3.so and
possible recursive locking detected, followed by DEADLOCK.

However, I was unable to get the same result in the following boot.

Then switch to 3.12-rc7 to send journal.

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