Bug#720329: xserver-xorg-video-radeon: Screen keeping black at start but for the cursor

Michel Dänzer michel at daenzer.net
Wed Apr 16 00:04:52 PDT 2014

On 20.03.2014 22:14, Adam Smith wrote:
> Interestingly, using the Mate desktop environment, KMS is noticeably
> more stable.  It can take some time for a crash to happen.  Even when
> running compiz 0.8.6 I can have 'the cube' (sad I know) working and
> still no crash.  In contrast, an LXDE, XFCE or KDE environment often
> causes an almost instant crash.
> This rather mirrors a problem I have with UMS and EXA.  Unless I set my
> FBTexPercent very low I often get corruption in application windows.
> This can be just the window title bar, or toolbar or even the whole
> window.  Even setting FBTexPerecent to zero I can still get this
> corruption.  It's very annoying.  Again, LXDE (or XFCE, KDE) is very
> prone to this problem (in particular PCManFM), but Mate doesn't seem so
> badly effected and it is why I'm running it.  
> I was wondering if the KMS crash and this UMS problem were linked in
> some way since MATE seems to solve or lessen both problems?  

That's unlikely. The driver stack works more or less completely
differently with KMS vs. UMS (which is BTW indeed not supported anymore

> I'm very keen to get KMS/UMS working properly on PowerPC, so if you
> need any more patches testing then I will gladly compile them.
> Btw, thanks for all the work you do with PowerPC!

I haven't really done much lately, and I'm not sure how much longer I
can do anything in that area... What's really needed is more people
working on the code.

Earthling Michel Dänzer            |                  http://www.amd.com
Libre software enthusiast          |                Mesa and X developer

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