[Bug 53637] Interference between KMS/RV515 and external firewire hardware (ffado device).

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=53637

--- Comment #14 from dmotd <inaudible at simplesuperlativ.es> 2012-08-17 14:36:21 UTC ---
(In reply to comment #13)
> (In reply to comment #12)
> > > You can also try setting:
> > > Option "NoAccel" "True"
> > 
> > This works and without any noticeable tearing or clipping. No hardware
> > acceleration but this is working better than disabling KMS.
> 
> It might be bandwidth contention.  The GPU pushes a lot of data around.

Sure, but why specifically in circumstances where the redrawing is limited to
2D and only with a few ui toolkits? I don't experience the dropouts when
gnome-shell is doing its fancy transitions and compositing or using a
sophisticated canvas tool like gimp, only with what seem like quite crude and
unsophisticated renderings - cat in a xterm for example?

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