[Bug 2610] New: Enabling MergedFB with only one head reports incorrect Xinerama info

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https://bugs.freedesktop.org/show_bug.cgi?id=2610          
     
           Summary: Enabling MergedFB with only one head reports incorrect
                    Xinerama info
           Product: xorg
           Version: 6.8.2
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Driver/Radeon
        AssignedTo: xorg-bugzilla-noise at freedesktop.org
        ReportedBy: aripollak at gmail.com


If I enable MergedFB support for my Radeon 9000 but do not connect an extra
monitor when X starts up, the X server still seems to report that I have 2 heads
connected, which confuses certain programs like XScreensaver and Firefox, which
start up taking only part of the screen.  For example, here is the output of the
text-xinerama program included in the xscreensaver source:

test-xinerama: 11:50:30: XineramaQueryExtension(dpy, ...) ==> 0, 0
test-xinerama: 11:50:30: XineramaIsActive(dpy) ==> True
test-xinerama: 11:50:30: XineramaQueryVersion(dpy, ...) ==> 1, 1
test-xinerama: 11:50:30: 2 Xinerama screens
test-xinerama: 11:50:30:   screen 0: 1400x1050+0+0
test-xinerama: 11:50:30:   screen 1: 640x1050+760+0          
     
     
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