Screen resolution with onboard graphics card

[Aaron Greene <akgreene@wam.umd.edu>]

Hi all,
I am trying to run debian on a machine with an onboard graphics processor.
When I run startx, the best resolution I can get is 640x480.  I've heard
of ways of borrowing system memory to use for graphical memory, but I
can't really find out how to do this.  Any tips?

Thanks much,
Aaron Greene