On Wed, Aug 5, 2009 at 3:24 PM, Ron King<[email protected]> wrote: > Hi, > I'm on Fedora 11, M56 x1600, X server 1.6.2-3, ATI driver 6.12.2-14. > Laptop with docking station and dual Samsung SyncMaster 940Be LCDs. > Docking station has one VGA and one DVI-D. All works fine in XP, Fedora > 8 (using Xrandr 1.2, I believe). > > LVDS and VGA work fine, alone or dual. DVI produces a vertical twitch, > always. Running the cursor up the screen shows missing horizontal > lines. Modes appear to be correct and match published monitor modes. > Changing modelines with xorg.conf and Xrandr do not seem to have any > effects. Adding modes in Xrandr and using them causes the monitor to > blank, then return and still report the same problem. Monitor reports > 31.7kHz and 30Hz regardless of changes. Is this mode hard coded for > DVI-D somewhere?
It sounds like your monitor doesn't like dvi coherent mode. try: xrandr --output DVI-0 --set coherent_mode 0 xrandr --output DVI-0 --off xrandr --output DVI-0 --auto If that doesn't work, you might try the driver from xf86-video-ati git master. The display issues may be due to underflow to the display controller. Alex _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
