[Bug 2859] Flickering or blanking on DVI output of Radeon 9200/9250

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=2859





------- Comment #90 from aherrman at web.de  2007-07-23 22:14 PST -------
Short update wrt flickering problem of my radeon card.
(VGA compatible controller [0300]: ATI Technologies Inc RV280 [Radeon 9200
 PRO] [1002:5960] (rev 01))

I reported the problem begining of last year.
I tried almost all fixes/workarounds found here and elsewhere but finally
had to stick to the analog output to avoid flickering on an
Eizo FlexScan L885.

Meanwhile I have another screen. It is an Eizo FlexScan S2000.

(1) On the new screen I can use the Radeon 9200 with DVI w/o any flickering!

(2) Furthermore I have another Gfx card
 (VGA compatible controller [0300]:
 ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)] [1002:5b60])
 It works perfectly with DVI on the older L885.
 (even w/o reduced blanking modeline or such)

In fact I run each card with dual screen using both monitors w/o problems.
The only thing that is not working is the combination of
Radeon9200+DVI+FlexScan\
L885.

This makes me think that just certain hardware combinations suck.
It's not the radeon card not just the monitor that caused that flickering.
This is dissatisfying but I don't care anymore ...

And I think that certain monitors (e.g. Samsung 204B and Eizo L885) are
less tolerant to the signal quality on the DVI input.


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