> On Fri, Nov 21, 2008 at 5:50 PM, Hans J. Koch <hjk at linutronix.de <http://lists.freedesktop.org/mailman/listinfo/xorg>> wrote: > > Hi,
> > I used to have a working system with a Radeon X300 (RV370) card and two > > monitors 1680x1050 each. I used an ancient xorg version (something like > > 6.8, can't recall) and had a MergedFB+Xinerama configuration. Worked well > > for me. > > > > A few days ago I dist-upgraded my Debian sid which brought me version > > 7.3 of xserver-xorg. Since that I'm trying to get my dual head setup > > working again... > > > > I understand that MergedFB has been replaced by RandR 1.2 extensions. > > Sounds like a good concept to me, but unfortunately it doesn't work here. > > > > X correctly detects my hardware, but no matter what I do, I always have > > the same output on DVI-0 and VGA-0. I googled around and found a lot of > > pages describing how to setup xorg.conf, and I think it's OK. > > > > Question: Is this supposed to work or a known problem? What do I have > > to do to get a working dual head setup again? > > yes it should work. you may need to add a virtual line to your config > to reserve enough framebuffer space for your config. This page gives > a pretty good overview of how to configure things with xrandr: > http://wiki.debian.org/XStrikeForce/HowToRandR12 > > One problem that comes up from time to time is that the xserver will > clone the outputs (drive both monitors with the same display > controller rather than with independent display controllers). The > xrandr utility doesn't seem to be smart enough to grab a new crtc when > you select multi-head, so you sometimes have to specify the crtc. run > xrandr --verbose to see how the topology is configured. > > You can use this set of commands to specify a crtc: > xrandr --output VGA-0 --off > xrandr --output VGA-0 --crtc1 --mode 1680x1050 > xrandr --output VGA-0 --right-of DVI-0 > > > Alex > Hi - I've recently upgraded my desktop distribution from Fedora 10 to Fedora 11, having worked up from various prior versions of Fedora. I too have an X300, which was working magnificently in dual head mode, originally in F9, and then, with a minor hack (I had to downgrade the radeon driver to the F9 version, 6.8.0-12) in F10. Now I'm at F11, it seems I can no longer make dual head work (the downgrade hack doesn't work, presumably due to incompatible versions). Having googled around, the description above is the best, most recent, fit I can find for the symptoms I'm experiencing. However, the solution that Alex suggests is not solving the problem; I am still stuck with both monitors displaying either the left hand side or the right hand side of the desktop (which exists, virtually - I can drag and drop windows off the side of the display and subsequently switch the monitors' - collective - view to see them). Worse, xrandr --verbose reports DVI-0 and VGA-0 on different CRTCs. Could the x server be cloning upstream of the video hardware? I am on version 1.6.1.901 of the Xorg server, and 6.12.2 of the radeon driver. Any suggestions much appreciated. I'm happy to post appropriate logs/dumps/etc if these will be of help (mostly greek to me). Thanks, Kenvor. _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
