kernel 3.1 switch to console display nothing
I have compiled kernel 3.1 64 bit for ubuntu oneiric with configuration for CORE2 march=native and mtune=native. I have two versions, one is compiled with ubuntu patches and second one without ubuntu patches.
(I have maximus iv extreme R3 BIOS 1850 motherboard. HD6990 with catalyst 11.8 properly working).
I have problem to switch to console by Ctlr+Alt+FN1.
It is always switched properly into console but has displayed blank screen.
(I can type login name and password and it evidently made login)
but I do not see anything displayed.
The problem is not catalyst graphic driver because when I ran under xorg-edgers compiled kernel 3.1 or another kernel from ubuntu ppa - it works just fine - console behaves normally.
Could anybody please help to kernel newbie to let me what am I missing within kernel compilation?
thanks a lot for any clue,
maximus iv extreme R3, BIOS:1850;i7 2600k(3.4GHz) OC:5.1GHz (air);16GB vengeance OC:1600MHz/188.8.131.52.1(air);ATI HD 6990 830MHz(air);HDs SATA III/II,AHCI,hot-plug;Firewire PCI-E not detected;