Comment # 32
on bug 68235
from Alexandre Demers
(In reply to comment #31)
> Created attachment 85989 [details] [review] [review]
> 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.
Running with the patch works fine over a vanilla kernel 3.12-rc1. The following
works also fine:
// if (pl->sclk > 25000)
// pl->sclk = 25000;
if (pl->mclk > 15000)
pl->mclk = 15000;
Which means sclk is working properly.
However, the opposite results in a blank screen before I can even get at the
login screen. It seems mclk is the problematic part.