On Tue, 15 Oct 2002, Spammers Must Die wrote:
> I just got my new 1280x1024 17" flatscreen set up, and
> it looked like hell, with moires, aliased vertical
> lines, etc.. As seems to be the case after running
> XF86Config originally, I had several 1280x1024
> ModeLines in my XF86Config file. The closest modeline
> looked like this:
>
> # 1280x1024 @ 61 Hz, 64.2 kHz hsync
> Modeline "1280x1024" 110 1280 1328 1512 1712 1024 1025
> 1028 1054
>
> Since the flat screen really wants to have *exactly*
> the right pixel
> frequency, as a shot in the dark I added these lines
> right above that
> one:
> Modeline "1280x1024" 108 1280 1328 1512 1712 1024 1025
> 1028 1054
> Modeline "1280x1024" 108.5 1280 1328 1512 1712 1024
> 1025 1028 1054
> Modeline "1280x1024" 109 1280 1328 1512 1712 1024 1025
> 1028 1054
> Modeline "1280x1024" 109.5 1280 1328 1512 1712 1024
> 1025 1028 1054
>
> I changed only the pixel clock - it's close enough
> that the other
> parameters didn't seem to need adjustment - and things
> look very good now..
> right now my display says it's getting 63.9 kHz
> horzontal sync - almost
> perfect. (The display wants 63.98 H and 60.02 V.)
>
> My question is: In the presence of several 1280x1024
> modelines, how is
> the modeline chosen? Is XF86 even using the XF86Config
> file?
I think the selection criteria is as follows:
Use the mode in the XF86Config file unless it falls outside
of the monitor specs listed in the XF86Config. If no such
mode exists, then it goes to the pool of modes internal to
XFree86. From that pool, it picks the highest refresh rate
mode that falls within the monitor specs. If you have multiple
modes by the same name in the XF86Config file, it probably
uses the last one.
Mark.
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