xfree86 issues

Andy Green fedora at warmcat.com
Sat Nov 1 10:05:53 UTC 2003

Hash: SHA1

On Friday 31 October 2003 17:00, Chris Locke wrote:
> I'm having problems with XF86. It will not let me run a resolution
> higher than 1024x768. I have a 19inch monitor so it is rather ugly. I

The usual reason for this is the values on these lines in the Monitor section 
of your /etc/X11/XF86Config:

        HorizSync    31.5 - 150.0
        VertRefresh  60.0 - 60.0

This is from my one which is driving an LCD panel, so I restricted the 
vertical refresh to 60Hz.  The values in the HorizSync entry are in kHz and 
basically describe how fast your monitor can draw.  The higher resolutions 
and refresh rates need faster drawing, if your Monitor description is telling 
X that it can't cope with that it won't let you select them.

Another important bit is this:

Section "Screen"
        Identifier "Screen0"
        Device     "Videocard0"
        Monitor    "Monitor0"
        DefaultDepth     24
        SubSection "Display"
                Depth     24
                Modes    "1024x768" "800x600" "640x480"

You need to make sure your desired modes are listed there (yours might be 
quite different, but the same basic layout).  X has a ton of built-in common 
modes in the axb format that you can try, like "1280x1024" or "1600x1200" 
assuming your monitor can cope.

If this doesn't help much, why not post your /etc/X11/XF86Config?

- -Andy
Version: GnuPG v1.2.2 (GNU/Linux)


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