By the way, you said that you were turning your resolution back DOWN
to 1600 x 1200, from 1290 x 1200. That is wrong terminology. You are
turning the resolution UP to 1600 x 1200, from the lower setting of
1290 x 1200.

or just a typo as there is no standard resolution of 1290 (there is
1280...)

Or perhaps 1920x1200 ... which explains his comment about turning the
resolution down rather than up.