Fedora 17 Graphical Issue
 

Hi! Im experiencing some weird situation and i havent been able to find a solution on the web.

After the "f" logo is loaded the screen goes blank and starts flickering (obviously some graphical error).
Sometimes I get a purple color all over the screen instead. Sometimes, while the f logo is loading, the edge of the screen appears in the middle and the display splits from the sides, like some broken TV channel. And when I move my mouse to the top right, I get white vertical lines and they dissapear as soon as i take my mouse away.
Once I blined tried Ctrl + Alt + F2 and managed to reboot the system so it seems the system is still running in the background.

Eventualy I found out that it was GRUB that was causing the problem. A temporary solution is to press "e" when GRUB is loading and change the line "set gfxpayload=keep" to "set gfxpayload=text".
But thats only for the next boot.
Anybody familiar with anything similar ? I don't know what to do !

Thanks in advance.

The proper fix is to edit /etc/grub.d/10_linux and run grub-mkconfig to generate a new grub.cfg file.

I've seen a similar problem on my desktop system with other distros when X tries to start in a mode unsupported by my monitor (because my monitor does not emit a proper EDID). The fix in my case is to create an /etc/X11/xorg.conf file with the proper modeline in the Monitor section (and the proper mode in the Screen section)

HTH