Hello there. I have a Debian Sarge running on my pc, and after a bit of struggling I managed to get a working bootsplash on a vesa framebuffer. However, I can't manage to fix this issue: whenever I am in console mode and open a file that is longer than the screen (using less, vim and the like), I can't scroll back, neither using the arrow keys nor the Page Up key.
Here is what man looks like after a couple of up keys:
Notice that when I press the down arrow the line shown is the one it should be displaying, but the rest of the screen doesn't refresh.
This doesn't happen when the vesafb is disabled. I have an NVIDIA TNT2 graphics card (the driver doesn't seem to help, tried both), on an Athlon processor.
My boot parameters (/boot/grub/menu.lst):
I have tried leaving out the video parameter, but it doesn't seem to solve the problem. The documentation for the vesafb (in the source tree) mentions ypan as an alternative to ywrap, but it doesn't seem to fix it (the other option is redraw, but it is the default, so I didn't explicitly test it).

Any help would be greatly appreciated.

PS: If someone know a program to take screenshots outside of X, please let me know so I can provide some decent output.

try shift+ctrl+pageup if you use just the arrows, it should show your last command line.

did you try just video=fb

Just tried video=fb, the result is the same. ctrl+shift+PageUp doesn't seem to do anything special either. I can't find the source of the problem... perhaps some kind of incompatibility between the fb and my video card?

could very well be, does everything work out in X? if so, then try launching rxvt transparently over a slim x like icewm or fluxbox just for doing console stuff. It's a hack, but it may work for you.

On X everything works fine. I could try what you say, but it would pretty much defeat the purpose of using the console (not being inside X).

have you ever tried it with the line just

video=vesafb

instead of
video=vesafb:ywrap,mtrr

Yes, I tried that. It doesn't help.