X can't start - unable to find initial modes -> duplicate of #5731

[Robin Green]

I installed Fedora Linux 12 in VirtualBox, and this seemed to work as long as I didn't use Full Screen mode. When I switched to Full Screen mode with Host+F and then shut down the virtual machine, changed the network configuration and powered up the virtual machine again, X wouldn't start in the guest.

I repeatedly tried to start X as root, and every time I got these kind of messages:

(II) VBoxVideo(0): Output VBOX1 has no monitor section (II) VBoxVideo(0): Output VBOX1 has no monitor section (II) VBoxVideo(0): Not using built-in mode "1440x900" (unknown reason) (II) VBoxVideo(0): No remaining probed modes for output VBOX1 (II) VBoxVideo(0): Output VBOX1 connected (WW) VBoxVideo(0): Unable to find initial modes (EE) VBoxVideo(0): Output VBOX1 enabled but has no modes (EE) VBoxVideo(0): Initial CRTC configuration failed! (II) UnloadModule: "vboxvideo" (II) UnloadModule: "vgahw" (II) Unloading /usr/lib64/xorg/modules/libvgahw.so (II) UnloadModule: "shadowfb" (II) Unloading /usr/lib64/xorg/modules/libshadowfb.so (II) UnloadModule: "fb" (II) Unloading /usr/lib64/xorg/modules/libfb.so (II) UnloadModule: "int10" (II) Unloading /usr/lib64/xorg/modules/libint10.so (II) UnloadModule: "vbe" (II) Unloading /usr/lib64/xorg/modules/libvbe.so (EE) Screen(s) found, but none have a usable configuration.

Fatal server error: no screens found

[Robin Green]

Xorg log file

[Robin Green]

vbox log

[Robin Green]

WORKAROUND - as root, copy to /etc/X11/xorg.conf

[Robin Green]

Oops, that file is in Windows format, so anyone wishing to use that workaround needs to run the following command first on that attachment:

dos2unix xorg.conf

[Michael Thayer]

Marking this a duplicate of #5731.