Radeon and dri dual head

Loren A. Linden Levy lindenle at uiuc.edu
Mon Jun 13 21:08:30 PDT 2005

On Mon, 13 Jun 2005 17:21:29 -0400
Alex Deucher <alexdeucher at gmail.com> wrote:

AD> > 
AD> > 1. If I run glxgears(or any other openGL code) on either of the
AD> > two monitors it changes back from Xinerama to cloned mode.
AD> that was a bug with pageflipping in 6.8.x  you can either try
AD> xorg/mesa/drm from cvs, or turn off pageflipping:
AD>          Option "EnablePageFlip" "False"
AD> If you want to try cvs you can either build from source or grab teh
AD> nightly binary snapshots here:
AD> http://dri.freedesktop.org/wiki/Download#head-55420c59a1c2e9a70f07a6fa02f0d228ffb87b76

Do you mean that i need to grab some of the Xorg code from cvs and add
it to 6.8.2 or that i should check out the entire tree from cvs?

AD> you can also leave those lines and add metamodes that include a
AD> clone mode, then you can switch between dualhead and single head
AD> with xrandr.

Thanks so much I specified the meta modes and now I can change between
dual head and single head.

For reference I have:

Section "Device"
        Identifier      "ATI RADEON 0"
        Driver          "ati"
#       Driver          "radeon         
        VendorName "ATI"
        BoardName "Radeon Mobility U2"
        VideoRam 65536
        BusID "PCI:1:5:0"
        Option "AGPMode" "4"
        Option "DPMS"
        Option "AGPFastWrite" "On"
        Option "EnablePageFlip" "On" 
        Option "MonitorLayout" "LVDS, CRT"
        Option "CRT2Position" "RightOf"
        Option "CRT2HSync" "30-94"
        Option "CRT2VRefresh" "50-75"
        Option "MergedFB" "true"
        Option "MetaModes" "1024x768-1024x768 1024x768-1200x1024
1024x768" Screen 0

Loren A. Linden Levy
481 Loomis, Department of Physics
University of Illinois at Urbana-Champaign
1110 W. Green St., Urbana, IL 61801-3080
Tel:   217-244-7995   Fax: 217-333-1215
Email: lindenle at uiuc.edu
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