VESA BIOS patching doesn't work even in cases where it should

[pulkomandy]

Reported by rodney on the IRC channel

• Enable "bios_patching true" in VESA configuration
• Try to set one of the custom video modes
• Error message: "The screen could not be set: General system error"

syslog:

KERN: vesa: applied patch0 in 1 locations
KERN: vesa: applied patch1 in 1 locations
KERN: vesa: applied patch2 in 1 locations
KERN: vesa: applied patch3 in 1 locations
KERN: vesa: vbe_get_mode_info(256): BIOS returned 0x00ff
KERN: vesa: vesa_set_custom_display_mode(): cannot get mode info for 100
KERN: vesa: video mode patching failed!

The patching prevents getting the info for the mode, I think. But setting the mode should still work in that case on Intel cards.

All the patches worked so we should be good to go.