how to set 1024*768 85 hz on ubuntu?

[nece228]

hello,
anybody know how can i change these parameters on ubuntu 5.10. because there is only 60 hz.

[devils casper]

you have to specify correct/supported Refresh Rate range only. X Server will pick correct value depending on Driver and Resolution selected.

[nece228]

my video card and monitor support this mode. and windows work with this mode, but ubuntu detects this monitor as generic monitor. my monitor model delta da-570 video: nvidia riva tnt2 model 64

[devils casper]

we need a bit more details. is there any display/Resolution problem with 60Hz Refresh Rate? did you try Higher Resolutions?

[IsaacKuo]

I'm not familiar with Ubuntu, so I don't know if it has some user-friendly GUI for doing what you want. I do, however, know the generic way to manually set what you want.

Basically, you need to edit /etc/X11/xorg.conf. One way to do this is the command "sudo pico /etc/X11/xorg.conf". This uses the "pico" text editor, which is not very fancy but it'll get the job done without you needing to learn a lot of arcane keystrokes. When you finish editing the file, use ctrl-X to exit pico.

In xorg.conf, you need to find the "Monitor" section, and adjust the HorizSync and VertRefresh ranges. Create the following lines in the "Monitor" section if they don't already exist:

HorizSync 31 - 80
VertRefresh 85 - 85

You can tweak this ranges a bit to get what you want.

After saving the changes, you can reset the X server by pressing ctrl-alt-backspace. This will kill any currently active session, so I'd recommend doing it after logging out to the login screen.