[xorg-bugzilla-noise] [Bug 763] New: Radeon driver reports Xv but doesn't show anything

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http://freedesktop.org/bugzilla/show_bug.cgi?id=763   
   
           Summary: Radeon driver reports Xv but doesn't show anything
           Product: xorg
           Version: 6.7.0
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: Driver/Radeon
        AssignedTo: xorg-bugzilla-noise at freedesktop.org
        ReportedBy: drzeus-bugzilla at drzeus.cx


Since I upgraded to xorg 6.7.0 I've been having problems with Xv on all three
machines I've tried it on. All of them have radeon cards of different models
(9700PRO, M9, 9000).

The problem is that the cards report Xv capabilities (using xvinfo) and all
calls to the Xv subsystem work. But nothing is displayed on screen.

The problem comes and goes (changes between reboots, never during a session) but
I haven't figured out what triggers it. At the moment the machines with the 9700
and 9000 work fine. The M9 worked until yesterday, when I changed kernel.
Changing back to the previous kernel didn't make the problem go away so now I'm
screwed basically.

I did however find a work-around. A bit pesky one, but still. If I change to a
text console (Ctrl-Alt-1 or similar) and then back to the X console, then
everything works. It continues to work until I restart the X server. So my guess
is that something has changed in the reset routines for the radeon cards that
causes this problem.   
   
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