[Bug 68235] Display freezes after login with kernel 3.11.0-rc5 on Cayman with dpm=1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68235

--- Comment #31 from Alex Deucher <agd5f at yahoo.com> ---
Created attachment 85989
  --> https://bugs.freedesktop.org/attachment.cgi?id=85989&action=edit
testing patch

Try this patch independent from any other patches.  It forces the engine and
memory clocks of all performance levels within a power state to the lowest
level.  If it works, then try and comment out either the sclk part or the mclk
part and see if either helps.  That should help us narrow down whether it's a
mclk problem or an sclk problem.

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