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

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=23387

Jonathan <dzhonw at mail.ru> changed:

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--- Comment #28 from Jonathan <dzhonw at mail.ru> 2011-08-19 18:03:57 PDT ---
(In reply to comment #27)
> (In reply to comment #26)
> > I appear to be having the same or a similar problem.
> 
> If there's any doubt (as there is in your case), it's better to file a separate
> report, to avoid cluttering up existing reports with unrelated problems.

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

> 
> > 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'll upload a
screenshot where that's "clear", though I don't know that it's necessarily
useful given what else you said.

> > With KMS disabled, there's no acceleration of any kind (I read somewhere that
> > this is by design), [...]
> 
> There should be at least 2D acceleration, but the r300g 3D driver indeed
> requires KMS.

Yes, 2d acceleration seems to be working okay.

> 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?
 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?

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