Just install F15 on a new HP Pavilion g6, and I'm having X troubles. I installed a minimal system from the DVD and added the X Window System and KDE Software Compilation groups with yum, so I may have missed some key piece of configuration in Anaconda. All packages are up to date, and I haven't pulled anything from -testing or third party repositories.
Out of the "box," X Windows only works with the Vesa driver. If I change vesa to intel in xorg.conf, X fails to start and complains no screens found. The Vesa driver seems to work, but it's limited to 1024x768, horizontally stretched to 1366. (There was a missing identifier in xorg.conf, too. Is there anything like the old xf86config to build a new xorg.conf?)
Based on past experience, I removed nomodeset from grub.conf. After doing so, I can't boot at all. Or rather, it seems I can boot, but the backlight doesn't come on so I can't see anything. It might be related to this
issue in Arch Linux; I haven't tried the suggested workaround, but it doesn't do anything now, so I don't know that it would work when booting.
Anyone know how I can get X working with the Intel drivers?
Yes, I know. Do just what they did on Arch Linux. Go into grub.conf, delete nomodeset, and add acpi_osi=Linux acpi_backlight=vendor. Then go fiddle with xorg.conf and replace vesa with intel, if you have not already. The actual backlight controls don't work, but at least the light comes on.