Let the drivers detect permisable refresh rates by commenting out the below thus,
Code:
# HorizSync 31.0 - 81.0
# VertRefresh 56.0 - 75.0
# Option "DPMS"
# Modeline "1280x1024_60" 135.00 1280 1296 1440 1688 1024 1025 1028 1066 +hsync +vsync
(# is put at the very start of the line)
What refresh rate are you aiming for? You can't do any more than the hardware will let you. I would be doing 1280x1024 but my monitor doesn't do that at 85Hz. So I fall back to 1024x768, this from my xorg.conf:
Code:
Modes "1024x768_85" "800x600_85" "640x480_85"