Hallo, I run FC3 with a Matrox Millenium G550 video card, an AMD Athlon64 CPU in an Asus K8N-E mainboard and so forth. I've had no display problems with FC2 or FC3. Being reasonably cautious, I installed FC4 in a separate partition. During and after the installation the display was/is very fuzzy (out of focus), when I open a window it isn't displayed at all, etc. etc. The new and old /etc/X11/xorg.conf files are identical. Kernel is version 2.6.11-1.1369. The boot command in grub.conf is: kernel /boot/vmlinuz-2.6.11-1.1369_FC4 ro root=LABEL=/1 rhgb quiet initrd /boot/initrd-2.6.11-1.1369_FC4.img Any idea what has changed between FC3 and FC4 (different video driver) ? Any suggestions of kernel boot parameters which might help ? Yours in hope, Francis Beckett