Reply With QuoteIf your monitor doesn't provide a 24hz modeline via the EDID, you'll need to manually add a modeline to your xorg.conf or at runtime using xrandr. See this page for more on xrandr configuration:
http://wiki.debian.org/XStrikeForce/HowToRandR12
Senior Member
4350: 24 Hz Output with KMS?
Anyone know how to get X to output 24 Hz when using KMS?
X.Org ATI Driver Developer
If your monitor doesn't provide a 24hz modeline via the EDID, you'll need to manually add a modeline to your xorg.conf or at runtime using xrandr. See this page for more on xrandr configuration:
http://wiki.debian.org/XStrikeForce/HowToRandR12
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