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I've recently upgraded to precise and whenever I try and login using the default "Gnome" or "Unity" options, I'm presented with either Gnome Classic or Unity 2d (confirmed by $DESKTOP_SESSION).

My graphics card is an ATI Radeon HD 5450 so I feel like it should quite happily run 3d. I've upgraded my version of ATI Catalyst to the proprietary 12.4 drivers and it hasn't done anything.

Any help would be appreciated!

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Is your graphics card compatable for Unity 3D. Try Unity 2D and see if it works. – JDL May 11 '12 at 9:20

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+25

I had the same problem myself just the other day. I fixed it by running this:

sudo apt-get install libglade2-dev libglade2.0-cil libglade2.0-cil-dev libglib2.0-cil-dev libgtk2.0-cil-dev libxml2-dev libdrm-intel1 xserver-xorg-video-intel

Also, I removed these packages using Synaptic:

xserver-xorg-video-ati
xserver-xorg-video-radeon
nvidia-current
nvidia-current
libgl1-mesa-dri:i386
nvidia-settings
xserver-xorg-video-nouveau

All works great. From what I have read the real problem lies in the nouveau drivers.

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