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I have a new install of Kubuntu 9.04. I installed the ati drivers.

fglrxinfo
display: :0.0  screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI FirePro V3750 (FireGL)
OpenGL version string: 2.1.8794 FireGL

When dragging a window from one monitor to the second monitor it stops when the mouse hits the edge of the screen.

Any ideas?

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What settings are you using? In particular, is your second monitor set to "TwinView" or "Separate X Display"? How are you configuring the two monitors? –  CarlF Oct 5 '09 at 17:14

1 Answer 1

up vote 2 down vote accepted

the reason you can't drag windows from one 'head' onto another 'head' is (as CarlF correctly commented) that your setup is in "separate x display" mode and not in "xinerama mode" (aka "twinview in nvidia-land or "bigdesktop").

such a "separate x display" setup means, that each head can possibly run a completely different configuration regarding visual depth, size, framerate etc. thus, a window created on one head (the term is actually "screen") can not be savely moved onto the other head because the "pixels do not match".

checkout http://ubuntuforums.org/showthread.php?t=221174 and configure your xserver correctly, then your problems will vanish .)

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I finally got it working with the help of this blog post sensiblerationalization.blogspot.com/2009/06/… –  ScArcher2 Oct 6 '09 at 14:00
    
Ah, great answer I wish I could upvote twice –  Denis Kniazhev May 7 '11 at 17:50

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