Date: Thu, 14 Jul 2005 18:18:29 +0200 From: Dejan Lesjak <dejan.lesjak@ijs.si> To: freebsd-x11@freebsd.org Cc: x11@freebsd.org, Mikhail Teterin <mi+kde@aldan.algebra.com> Subject: Re: flickering picture on FP-monitor attached to Radeon's analog head Message-ID: <200507141818.30235.dejan.lesjak@ijs.si> In-Reply-To: <200507140046.43242@aldan> References: <200507140046.43242@aldan>
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On Thursday 14 of July 2005 06:46, Mikhail Teterin wrote: > Hello! > > I have to different setups where digital flat panels are attached to the > analog (secondary) outputs of differnet Radeon-based cards. > > In both setups the selected resolution matches the monitor's native and > the timings are selected based on DDC data obtained from the monitors. > The monitors are from different makers (Dell, Planar). > > In both setups, the monitor attached via a VGA cable is showing > distinctly worse picture, than its twin, that is attached to the DVI. It > is particularly noticable during the initial X startup (the waves go up > and down X's black-and-blue grid). > > I know, DVI is supposed to be better than VGA, but not this much > better... > > Is there a trick, perhaps, some Option of the radeon driver? Thanks! Actually apparently DVI is that much better. I get same flicker with Samsung flat panel on nvidia both under X (same on FreeBSD and SUSE) and under Windows (XP and Server 2003 FWIW). With DVI the picture is excellent. So I would think this is not as much problem with X. If however anyone has some magic setup options, I'd welcome them as well :) And yes it gets more bearable depending on color/texture of background. The grid on X startup is designed to be difficult on monitors... Dejan
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