Re : [Openchrome-users] Which unichrome can do 1920x1200 DVI or VGA?

[Luc Verhaegen]

On Tue, Aug 22, 2006 at 08:54:57PM -0400, manu wrote:
> Le 22.08.2006 20:19:00, John Robinson a ?crit?:
> > On 22/08/2006 19:43, manu wrote:
> >>     Hi all,
> >> subject says it all.
> > 
> > They can all do 1600x1200 on a CRT (using a GTF modeline), and should  
> > manage 1920x1200 on a flat panel (using a CVT/reduced blanking  
> > modeline). Try this:
> > # 1920x1200 @ 60.00 Hz Reduced Blank (CVT)
> > # field rate 59.95 Hz; hsync: 74.04 kHz; pclk: 154.00 MHz
> > Modeline "1920x1200_60.00_rb" 154.00 1920 1968 2000 2080 1200 1203  
> > 1209 1235 +HSync -Vsync
> > 
> > Cheers,
> > 
> 
> Thanks, I will try when I buy it actually, I am still in the process of  
> choosing the parts.
> So 1920x1200 would be only possible on DVI, well if I cab find the epia  
> module for that!
> Thanks,
> Emmanuel
> 
Reduced blanking has nothing to do with DVI, except that its main use 
is to get around the limited bandwidth a single-link DVI connection 
offers. It'll work on an analoguely connected panel just as easily, but
my DVI-D capable CRT wraps edges around.

If you want to make use of reduced blanking, then you do need to set the 
"ReducedBlanking" option in your monitor section. Make sure you have 
xorg 7.1, as i only committed this right after the 7.0 release.

But reduced blanking won't help you attain a higher resolution here.

32bpp 1600x1200 at 60Hz is already stretching it for a DDR266 VT3122 with 
current FIFO settings. The memory bandwidth just isn't sufficient. And 
my code doesn't accept anything higher than that.

Luc Verhaegen.