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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Rv6xx dpm problems"
href="https://bugs.freedesktop.org/show_bug.cgi?id=66963#c192">Comment # 192</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Rv6xx dpm problems"
href="https://bugs.freedesktop.org/show_bug.cgi?id=66963">bug 66963</a>
from <span class="vcard"><a class="email" href="mailto:paul.bodenbenner@gmail.com" title="Paul Bodenbenner <paul.bodenbenner@gmail.com>"> <span class="fn">Paul Bodenbenner</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=66963#c190">comment #190</a>)
<span class="quote">> (In reply to <a href="show_bug.cgi?id=66963#c189">comment #189</a>)
> > (In reply to <a href="show_bug.cgi?id=66963#c188">comment #188</a>)
> > > (In reply to <a href="show_bug.cgi?id=66963#c183">comment #183</a>)
> > > > You might also try my 3.14 branch:
> > > > <a href="http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-3.14">http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-3.14</a>
> > >
> > > Not sure if there are any important changes in this branch, but so far it
> > > looks more stable for me. I haven't seen hangs while video was played,
> > > though the week before i got them almost daily. And have seen hand during
> > > start up only once for last week.
> > >
> > > I might be just very lucky this week.
> >
> > Still don't see hangs, but noticed but FPS is very low on this branch. Half
> > Life is like a slideshow, though works fine with vanilla kernel.
>
> Are you sure you have acceleration enabled, the behaviour you describe
> matches what I found when started testing that branch (grep dmesg for
> "*ERROR* radeon: ring 3 test failed (0xCAFEDEAD)").
>
> If you have that problem you could test the patch I sent in <a href="show_bug.cgi?id=66963#c175">comment 175</a> (
> <span class=""><a href="attachment.cgi?id=91835" name="attach_91835" title="Disable the DMA ring in R6xx">attachment 91835</a> <a href="attachment.cgi?id=91835&action=edit" title="Disable the DMA ring in R6xx">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=66963&attachment=91835'>[review]</a> [review]), It will skip initialization of the DMA
> ring and enable acceleration again. I've been using it for several weeks, no
> hangs yet, works like a charm.</span >
Thanks for your patch! I adapted it to the current git state and I will attach
it here (hope I made no mistake ;-)).
So with that patch the drm-next-3.14 branch works very well:
Booted up about 25 times with only 3 hangs. Suspend worked every time. :-)
@Alex Deucher:
Very good job! Whats wrong with ring stuff. Do we need a new version of
xf86-video-ati?! Also can I do anything against the seldom hangs?
Best Regards,
Paul</pre>
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