Modelines and DVI-D output

[Morten Sylvest Olsen]

Hi list..

Is anybody here a world champion in modelines? :) How exactly does
modelines make a difference when driving TFT monitors over a DVI-D link?
Obviously the different timings related to beam retracing etc. have no
physical meaning.

The reason I am asking is that I have a TFT monitor that simply refuses
to show anything at all. The monitor is a Barco E-3220 which is a
"medical" type greyscale monitor with resolution 1536x2048. The monitor
supports EDID and returns a modeline, which X uses but the monitor is
never able to sync on the signal.

Modeline "1536x2048"  200.00  1536 1564 1580 1584  2048 2088 2120 2152

The graphics board is an ATI FireGL V7100 (using the binary driver
though, but don't know if that really matters)

I would not put it past them to return crap in the EDID, since they try
to sell hideously overpriced "medical" graphics board together with
their monitors.

A previous monitor of theirs return EDID data 2048x1536: 

Modeline "2048x1536" 200.4  2048 2096 2156 2152 1536 1537 1557 1558
                                           ^^^^
where h_blank_end is before h_sync_end. That *must* be bogus, right? 

Hope somebody is able to shed a bit of light on this.


Regards, Morten
-- 
Morten Sylvest Olsen, System Developer
Medical Insight A/S, Hovedgaden 451 C,2640 Hedehusene, Denmark
Phone:+4546550444, Mobile:+4551573092,Mail: mso at medical-insight.com