On Mon, Apr 04, 2005 at 04:40:13PM +0100, John Austin wrote: > I have just installed FC4T1 x86-64 on Ext USB disk > > Suspect that the graphics resolution/scan rates not supported by LCD > monitor but not certain. Seems odd as... > > The main disk of the machine runs FC3 x86-64 with no such problems > Graphics card is very standard Matrox G550 Not helpful at all, I know, but I use a G550 with two monitors on an Athlon (32bit) system with no hassles. Have you tried a CRT monitor instead? Have you checked the settings in /etc/X11/xorg.conf for compatible scan rates etc? Regards, Msquared...