On Wed, 13 Jul 2011 23:37:51 -0700
> It sure sounds as if the video signal coming out of the graphics
> card is beyond the monitor's range.
> That's not supposed to happen with recent xorg, unless the monitor
> is misreporting its capabilities when the graphics card interrogates
> it or something (related to DOSBox?) is issuing an xrandr for an
> unsupported mode.
> What kind of monitor?
I changed the BIOS settings to fixed video memory allocation (128 MB)
but it doesn't help.
By the way: I had the same problem with the parole media
player on Xfce 4.8 (but then moved to GNOME).
Any further suggestions?