Thanks everyone. I'll got my new kernel compiled with framebuffer support. Yes, I have played with vga=ask parameter - T20 just doens't like those old EGA modes ... I've not tried the TextSVGA package, it didn't look promising since the Savage IX card has been supported for about 5 months ( and only works 8 bpp with KDE 2.1 from sid ).
As for the hibernation partition, I'll investigate it further following Russel's suggestion to look at BIOS NVRAM. So far I have played with lphdisk, modified it to support any primary partition, but BIOS remained completely oblivious to its existence. I'm wondering how much Phoenix remained in T20 BIOS, IBM may have limited its original functionality. E.g Dell provides it's own utility to handle the hibernation partition for Latitude notebooks, supporting multiple data chunks together( like partition + file ), the partition type is not A0H, but 84H. Thanks again Jacek