On a fairly generic low end board with onboard trident video and a PCI video card plugged in the installer and firstboot correctly configure X to use the PCI card. If system-config-display runs it changes the video card to the disabled on board trident driver and this breaks X entirely.
This should be fixed in the next version 1.0.20 -1 which should hit the bugweek repo on next pull. I'd be greatful if you could test both normal mode and --reconfig
Looks ok now. It is still trying to load the trident driver which is bonkers as the chip is disabled in PCI space but it does then try chips next and this works out. Did have to add the import rhpl.mouse fix to test Alan
*** Bug 136873 has been marked as a duplicate of this bug. ***