console resolution on a T41

[Galanaki, Dimitrios]

I am trying to increase the console resolution on my Thinkpad T41 which has
an ATI mobility radeon card.
>From what I read the standard step is to add the lines following lines in
the kernel configuration file:
options   VESA
options   SC_PIXEL_MODE
However when I run
vidcontrol -g 100x37 VESA_800x600
I still get that the mode is not supported by the device.
Is there something that I am missing here? Has anyone tried to increase
console resolution on a T41 Thinkpad or even an ATI mobility radeon laptop?

D.