How to set refresh rate

[MillTek]

Hi,
On a Debian distro of Linux I have a PNY FX5200 dual head video card. I run two Viewsonic monitors. They aren't the same model (GS790- and PF790) and at the size I use, 1280x1024 a good refresh rate would be 90Hz. The system always sets it to 85Hz and I would like to alter that. Is therere a way to set the Vert refresh rate used?? I'm running 6106 Nvidia drivers by the way.

I'll post extracts from my config files if needed.

Thanks

Jim

[how]

Originally Posted by MillTek

Hi,
On a Debian distro of Linux I have a PNY FX5200 dual head video card. I run two Viewsonic monitors. They aren't the same model (GS790- and PF790) and at the size I use, 1280x1024 a good refresh rate would be 90Hz. The system always sets it to 85Hz and I would like to alter that. Is therere a way to set the Vert refresh rate used?? I'm running 6106 Nvidia drivers by the way.

I'll post extracts from my config files if needed.

Thanks

Jim

First is your monitor 19" and support 1280x1024@90Hz? I don't know what your models are.

The Xserver video driver always sets to 85Hz for 1280x1024 because it is the standard VESA modes. It gets it from the monitor. If you want non-standard modes then you need to specify modelines in your XF86Config or xorg.conf. There are couple of modeline caculators on the web and here is one http://www.dkfz-heidelberg.de/spec/linux/modeline/
I just recently used it and i get 90Hz!

[MillTek]

Thanks . I'll try the calculator. My monitors do support the size by the way.


Jim

[Thunderbird]

Really higher doesn't have to improve image quality at all, getting away from its optimal frequency (85Hz useally) even decreases quality a bit. Further you don't see the difference between 85Hz and 90Hz.

[MillTek]

The only reason I'm trying to get 90Hz to work is that the specs for both monitors state that 90Hz is best for 1280x 1024. No other reason. I just want to run them at their design specs.

Jim