I completely forgot about the new version of xrandr in Gutsy. I'll come up with something that works for Feisty as well.
Until then, you can quickly change your resolution with:
xrandr -s 1280x1024
Does the following command return a 0?
Code:echo `xrandr` | tr " " "\n" | grep -m 1 "\*." | sed 's/*//'