[Nouveau] Problem with GFX 5500 Inno 3D - 2

[Zbigniew]

I forgot: maybe useful will be additional information, that I'm unable
to get any "framebuffer" mode functional with this card and nouveau
module loaded - for example, when I set as "boot parameter" something
like "VGA=0x314", then screen gets dark and blank, when entering
framebuffer mode; fortunately, I can shutdown machine in such case
with power button (therefore the system is still running).
-- 
Z.