[Bug 23387] [R300] Screen artifacts on X [KMS]

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Aug 22 03:17:12 PDT 2011


--- Comment #31 from Michel Dänzer <michel at daenzer.net> 2011-08-22 03:17:11 PDT ---
(In reply to comment #28)
> > If there's any doubt (as there is in your case), [...]
> I was wondering if that was the case.  I found a series of bugs here that
> seemed similar, but this one seemed to be affecting roughly a set of graphics
> cards mine fell under in roughly the same way.

That's not good enough I'm afraid. It could be true for any number of different

> I'd be happy to open a new bug for this issue if you think it's worth it at
> this point.

Assuming it doesn't turn out to be a Unity issue, yes.

> > > As you'll see, I've tried a number of the options suggested here and elsewhere.
> > >  I've had varying degrees of success.  Before I started playing with it, I was
> > > getting a minimal amount of artifacts (see the first screenshot),
> > 
> > That actually looks more like a Unity / X server issue (not rendering the
> > desktop background properly) than a driver one.
> Well, background rendering is by far not the only problem.

I was only referring to the first screenshot, as the above sounds like the
additional problems only started after tweaking options.

> > I wonder if there's any point in keeping this report open, as it seems to
> > basically boil down to "AGP is broken, and there's little we can do about
> > it"...
> Hm, could you elaborate on how AGP is broken and how that affects this problem?

Note that the above was referring to this bug report, not necessarily your

> If it's something that a bug could be reported for (e.g., a kernel driver),
> would it be worth my time to submit one?

Probably not, lots of AGP bridges had various correctness / stability issues
which could result in all kinds of funny behaviour.

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