Comment 6 for bug 581466

> Also, the framebuffer is needed in order to enable tv-out on my matrox g550...
[cut]
> Everything turns back to normal activity when I quit mplayer.
This needs some explanation, since the story is a bit more complicated.
When I run `mplayer -vo dfbmga myfile.ext' then the clip appears con my tv, at the same time my desktop gets corrupted, it's at 640x480 and filled with random pixels. Now two cases:
1) During playback I switch to a virtual console, then come back to xorg. After this, the desktop appears again at 1280x1024 but xorg works badly, it skips many window decorations, it still shows some corruption at the higher border of the screen and if I move some window then it's likely to disappear. Quitting mplayer doesn't restore xorg functionality so I have to shut it down (that is, logout and then login again) in order to have back a working desktop.
2) If I press `q' during playback, then mplayer quits, but my desktop isn't still usable. It gets at 800x600 and still filled with random pixels. Now I can switch to a virtual console, then back to xorg and finally I have a working desktop.
I can post more details, if needed.
All this description brings me the idea there is a bad interaction between matroxfb and some other software.
I need some help.