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I'm running Fedora Core on a Dell 2400 with a Daytek DT-95P monitor. After some messing around, I managed to get different resolutions working, but I can't seem to change the refresh rate. Preferences > Screen Resolution and xrandr both report 85hz but my monitor (and my eyes) say 60hz. I even tried adding Modeline's generated with videogen to my XF86Config but it didn't help. My monitor specs are setup.
I even tried adding Modeline's generated with videogen to my XF86Config but it didn't help
I've observed that some distros use the file called "XF86Config" and others use "XF86Config-4" in order to configure the X server; are you sure that Fedora uses "XF86Config"? Couldn't it be "XF86Config-4"? (I never used Fedora; is just a guess)
I don't seem to have a XF86Config-4, although reading the docs, it sounds like it looks for this name first, and then for plain XF86Config. So I don't think that's the problem. And my changes do have an effect, so presumably it's the right file.
The XFree86.0.log contains the following error:
Extended Bios function 0x5f05 not supported
Failed to set refresh rate to 85hz
Also having problems with changing monitor refresh rates.
Tried modelines from XF86Config-4, but couldn't find any help from those.
At the moment I have 1280x1024@85hz, and I would like to get 100hz, because it's more pleasant to play games with.
I have Samsung 959NF and Radeon 9800Pro.
I'm not sure what the error means, but I have always had trouble manually editing XF86Config. On my Debian machine I booted a Knoppix CD and copied the resulting XF86Config-4 file to use. Since Knoppix magically auto-configures everything, it works great. Knoppix probably won't work for a Red Hat machine, but you may try booting a MandrakeMove live CD and see if it works at 85hz. If so, you could copy the XF86Config-4 file and it should work since Mandrake is based on Red Hat. It is an un-educated solution, but may be a quick way to get things working.