[xorg-bugzilla-noise] [Bug 1354] New: screen not centered after logout if resolution has changed

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https://freedesktop.org/bugzilla/show_bug.cgi?id=1354        
   
           Summary: screen not centered after logout if resolution has
                    changed
           Product: xorg
           Version: 6.8.0
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P2
         Component: Server/general
        AssignedTo: xorg-bugzilla-noise at freedesktop.org
        ReportedBy: egmont at uhulinux.hu


I use gdm, log in to some desktop system, and press Ctrl+Alt+NumpadPlus to
change to a lower resolution instead of my 1280x1024, let's say to 1024x768.
Then log out. When the gdm screen appears again, the monitor is swithced back
to the original 1280x1024 resolution, but gdm's screen it is not centered
correctly, it is shifted upwards and to the left (or maybe to other
directions). The mouse cursor appears at the center of the not-fully-visible
gdm screen, e.g. not on the center of the monitor. The rest of the screen is
filled with some garbage, that is, parts of the gdm screen shifted out, parts
of the previous desktop session and maybe other random bits. Pushing the mouse
out of the four edges of the screen causes the screen to be centered and then
everything is okay, so only the initial position of the visible part of the
screen is not calculated properly.

The bug is present in both 6.7.0 and 6.8.0, but not in xfree 4.3.

Tested on two machines. Both have lcd 17'' display with 1280x1024 default
resolution. One has a Matrox G400, the other is some i810.        
   
   
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