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Re: X server Resolution Catch-22 Fedora 12



On Mon, Nov 23, 2009 at 03:51:27PM -0500, Adam Jackson wrote:
> On Mon, 2009-11-23 at 12:59 -0700, Michal Jaegermann wrote:
> 
> > 'man -k mode | grep VESA' prints
> > 
> > cvt []               (1)  - calculate VESA CVT mode lines
> > gtf []               (1)  - calculate VESA GTF mode lines
> > 
> > but what is a difference?
....
> 
> They're both timing generation formulas.  GTF is older, a bit more
> complex, and generally matches the physical requirements of CRTs.  CVT
> is newer, simpler, and has a cheat code for reduced bandwidth
> consumption on LCDs.  This is important, among other reasons, because
> the DVI link speed is 165MHz:
....
> 
> tl;dr version: GTF for CRTs, CVT for LCDs.

Thanks a bunch for these explanations.  It would be nice, though, if
manpages would mention some of that and mutual cross-references in
SEE ALSO sections would be also not out of order.

    Michal


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