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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Computer freezes with kernel 3.11.0 / 3.12-rc1 (with bug 68235's patches applied) when dpm=1 on r600g (Cayman)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69723#c23">Comment # 23</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Computer freezes with kernel 3.11.0 / 3.12-rc1 (with bug 68235's patches applied) when dpm=1 on r600g (Cayman)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69723">bug 69723</a>
from <span class="vcard"><a class="email" href="mailto:alexandre.f.demers@gmail.com" title="Alexandre Demers <alexandre.f.demers@gmail.com>"> <span class="fn">Alexandre Demers</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=69723#c22">comment #22</a>)
<span class="quote">> (In reply to <a href="show_bug.cgi?id=69723#c19">comment #19</a>)
> > Official kernel 3.12 still failing with latest mesa and drm. It always ends
> > up with a white screen when it freezes and it is impossible to connect
> > remotely by SSH.
> >
> > Would it be possible to add some debug/trace option to find where was the
> > last recorded call or to print some key values/settings when they are
> > changed/set? Maybe that could help narrow down where it hangs.
>
> The problem is the driver is not really involved except for the initial
> programming of the states. The GPU does the reclocking internally once it's
> enabled. Best bet would be to adjust the values programmed into the state
> that's loaded into the SMC to see if you can narrow down what aspects are
> problematic.</span >
Well, maybe the first thing would be to identify when or what sequence leads to
the hang. That's why I was suggesting to trace it. But if I understand you
correctly, you are saying the GPU is programmed once and then we just move from
state to another, right?
I'm not sure, but I think I've read somewhere it was possible to set a power
state manually, to force dpm to a given state in other words. Am I right?</pre>
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