[SOLVED] Extended monitor on a second monitor with Gnome

I was just trying gnome. I have a second monitor (connected to the VGA port). When I configure it as a second monitor extending my desktop, the windows freeze or move erratically and there is no possibility to click / write into them any longer. The same phenomenon appears if I configure the dual screen in gnome (via the settings menu) or if I use the command line xrandr ( xrandr --output LVDS1 --primary --mode 1280x800 --pos 0x0 --output VGA1 --pos -1284x-251 --mode 1280x1024 ). Exactly the same problem appears with Ubuntu 11.04 (tested from the live CD).
The strange fact is that the good old icewm works perfectly fine.
I am not sure this is relevant but here is the output of lspci relative to my graphic card:
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
Edited: I mark this thread as solved since the answer of eldragon is convincing (but of course Gnome3 is still not working in my configuration)
Last edited by olive (2011-08-02 20:08:48)

well, your graphics card doesnt support textures bigger than 2048x2048. gnome3 is a composited desktop.
try setting one screen on top of the other one instead.

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This question was solved.
View Solution.

Hi,
Please disable HDMI sound to force audio back to the laptop or use different conection such as VGA or DVI. To diable HDMI sound, please right click speaker icon > playback devices > right click and disable HDMI sound.
Regards.
BH
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[SOLVED] Extended monitor on a second monitor with Gnome

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