Horizontal refresh rate higher than my monitor can cope with

[davosmith]

My desktop works fine in 1280x1024 mode (refresh rates horizontal: 80 khz, vertical: 75 hz), but as soon as a program (usually a game) switches to a lower resolution (for example 800x600), the horizontal refresh rate goes outside the range my monitor can handle (e.g. horizontal: 81.4 khz, vertical: 65.6 hz).

My xorg.conf (as you should be able to see from the attached nvidia-bug-report.log) has the horizontal refresh limited to a maximum of 80.

This problem does seem to be related to the video driver as using the alternative 'nv' driver manages to avoid this problem (but at the loss of the desktop compositing and still being unable to play any 3D games).

Am I missing something from my xorg.conf, or is there some other setting I need to convince the nvidia driver to respect my maximum horizontal refresh rate?

[davosmith]

Anyone?

[Lethe]

Try limiting the refresh in xorg.conf on the screen sizes thus:

    Subsection "Display"
        Depth       24
        Modes "1280x1024_60" "1024x768_60" "800x600_60" "640x480"
    EndSubsection

There I set my max refresh rate to 60 on any screen sizes I am likely to use. So you would need to do something like:

    Subsection "Display"
        Depth       24
        Modes "1280x1024_80" "1024x768_80" "800x600_80" "640x480"
    EndSubsection

...I guess.

Nick

[davosmith]

Originally Posted by Lethe

Try limiting the refresh in xorg.conf on the screen sizes thus:

    Subsection "Display"
        Depth       24
        Modes "1280x1024_60" "1024x768_60" "800x600_60" "640x480"
    EndSubsection

There I set my max refresh rate to 60 on any screen sizes I am likely to use. So you would need to do something like:

    Subsection "Display"
        Depth       24
        Modes "1280x1024_80" "1024x768_80" "800x600_80" "640x480"
    EndSubsection

...I guess.

Nick

Fantastic! After months of not being able to run games fullscreen, this works perfectly!

I just appended '_60' to all the 800x600 modes and it worked perfectly (I didn't want '_80' as that would be setting the vertical refresh rate to 80, when I was wanting to limit the horizontal refresh rate; I figured that as the vertical rate of 65 was pushing the horizontal rate slightly too high, a vertical rate of 60 would do the trick).

Thanks again