not necessarily the hsync matters as well
and actually 1024x768x87hz is actually interlaced 43hz vsync if your screen flickers on every odd/even lines so you are still around 31.5khz hsync.
you can try xorg/xfree setup (xorgcfg/xf86cfg) and choose your monitor from there and try and choose your res.
also check the startx output for errors
Last edited by db391; 09-23-2004 at 06:17 AM.