I'm running a dual head system of two graphics cards. 1) AGP radeon 9550, and 2) PCI 64MB radeon 7000.

When I open or close windows on the monitor run by the AGP card the other monitor will black out for about 1-2 secs. Also moving windows around on either monitor will make the screen run by the PCI card black out briefly.

Does this behaviour sound familiar to anyone?

Thanks,
D

Am running etch, with GNOME. Both display are LCD. I've tried various options in xorg.conf.