[Bug 66963] Rv6xx dpm problems

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66963

--- Comment #192 from Paul Bodenbenner <paul.bodenbenner at gmail.com> ---
(In reply to comment #190)
> (In reply to comment #189)
> > (In reply to comment #188)
> > > (In reply to comment #183)
> > > > You might also try my 3.14 branch:
> > > > http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-3.14
> > > 
> > > 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 comment 175 (
> attachment 91835 [details] [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.

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

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