Created attachment 373982 [details] Xorg.log Description of problem: Black screen in X with F12 Environment: Matrox G550 TFT with 1280x1024 resolution at DVI connector How to reproduce: Boot Fedora-12-i686-Live-KDE Display ends up with black screen and parameter out of range info. Switching to text console with ALT-F2 seems to work but new output corrupts the display. Toggling between ALT-F1 and ALT-F2 restores temporary the console display till next output. Observations: The default mode of the matroxfb kernel driver seems to be the culprit. In dmesg is this: matroxfb 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 matroxfb: Matrox G550 detected matroxfb: MTRR's turned on matroxfb: 640x480x8bpp (virtual: 640x26214) matroxfb: framebuffer at 0xFA000000, mapped to 0xf8000000, size 33554432 fbcon: MATROX (fb0) is primary device fb0: MATROX frame buffer device "video=matroxfb:vesa:0x11B" from kernel doc matroxfb.txt on the kernel command line seems to have no effect because matroxfb_base is loaded as a module. But "matroxfb_base.vesa=0x11B" does the trick. In dmesg is this: matroxfb 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 matroxfb: Matrox G550 detected matroxfb: MTRR's turned on matroxfb: 1280x1024x32bpp (virtual: 1280x3276) matroxfb: framebuffer at 0xFA000000, mapped to 0xf8000000, size 33554432 fbcon: MATROX (fb0) is primary device fb0: MATROX frame buffer device The text console and X are now working as expected. Xorg.log is identical with and without "matroxfb_base.vesa=0x11B" "vga=795" on the kernel command line is also working. But this involves kernel vesafb and kernel matroxfb fails to start.
While we prefer the various logs as attachments, it seems that the reporter has included the relevant info, so.. This bug has been triaged -- Fedora Bugzappers volunteer triage team https://fedoraproject.org/wiki/BugZappers
*** This bug has been marked as a duplicate of bug 466318 ***