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[Bug 491354] [NEW] switch metacity -> compiz reduces visible screen size with the rest in black


Public bug reported:

Binary package hint: compiz


When I try to enable compiz with the "system -> preferences -> appearance" menu the screen size is completely misunderstood by compiz. 
I think this is a switch-over from metacity Installed: 1:2.28.0-0ubuntu1)  to compiz (Installed: 1:0.8.4-0ubuntu2). 

All the GUI functionalities seem to be there, but only the upper left
part of the screen is actually drawn, with the rest BLACK. The mouse
moves over the black parts as well and with ALT-mouseclick I can drag
windows from the black part into the visible part. The mouse cursor
changes from the arrow the a text-cursor when moving over a terminal
which is in the black part.

The appearance menu doesn't report a probem (it gives the normal window
with "keep this configuration" and "restore previous settings". I don't
see in errors in the /var/log/* files.

My screen is 1680x1050 pixel (macbook pro 4,1 running 9.10). The left-
upper part that is visible in "compiz-mode" is roughly 1/3 horizontally
and vertically (with the rest black).

I'm running the nivdia 185 driver (as found by "hardware drivers"). I
tried to see if "Sync to VBlank" in Nvidia X Server Settings makes a
difference to this bug: it does not. The Nvidia X Server Settings have
the right 1680x1050 screen size.

Not directly related:
This screen size is NOT put /etc/X11/xorg.conf file correctly when you install the Nvidia 185 hardware driver. Because of that the gdm login screen is too big compare to the physical screen.

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New

switch metacity -> compiz reduces visible screen size with the rest in black
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