Have you tried adding that resolution into your /etc/X11/xorg.conf file?
I would like to ask, each time i start my bt 4 in vmware(mac), it's resolution always set to 800x600, and i need to change it back to 1680x1050 everytime i start the X win
how to fix the resolution to stick on 1680x1050
coz i feel tired to change it each time when i startx
thanks.
Have you tried adding that resolution into your /etc/X11/xorg.conf file?