Comment 50 for bug 553745

For me it happened after adjusting the grub display resolution to a higher-resolution than the default 640 480 vga setting, in fact it was 1280 1024 32 [found as supported in vbeinfo], set in /etc/default/grub as GRUB_GFX_MODE, GRUB_GFXPAYLOAD_LINUX=keep; the higher resolution worked as far as the ubuntu splash screen, then at xserver startup it looked as though possibly the 32-bit depth is too funky :-) attached xorg.conf as you see I've set 1 high-res setting, not supported in vbeinfo though