[Bug 360713] Re: Poor display performance w/Intel 945GM, cannot enable desktop effects

[Udude]

What's interesting is that when I boot WinXP (shhh... I know) I can
setup the dual-monitor side-by-side quite nicely. It looks like 945 hw
supports this virtual-desktop size. Well, at least in 2D hw-accelerated
mode...

Also, looks like I found a bug (not sure if a bug-report already exists):
I created a virtual desktop in which the displays are one on top of the other:
Laptop LCD is 1280x800
External monitor is 1280x1024
virt desktop  is 1280x1824, which is within the limits of 2048^2.
This 'kinda' worked. By 'kinda' I mean that both displays work w/compiz, however the background of the secondary monitor does not repaint when dragging windows, and half of the primary display suffers from the same problem. 

I tried to create a screen shot but ironically it does not capture the
problem... the desktop snapshot looks perfectly fine

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Poor display performance w/Intel 945GM, cannot enable desktop effects
https://bugs.launchpad.net/bugs/360713
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