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I installed (twice) Ubuntu x64 11.10 and it does boot (most of the time, sometimes it gets stuck with this problem My fresh installation doesn't load. (PulseAudio problem))

The little startup sound plays, I see a background, and a toolbar left and a thinner grey one top. There's three buttons on the left one, nothing on the top. I can move the mouse cursor but no key press or mouse (left or right click) anywhere does anything. I don't know what's going wrong with it or what to search for to find a solution. I'm hoping someone has an idea from this description.

The hardware is relatively modern so quite possibly it needs some drivers or configuration changes:

intel DX79T0 motherboard i7 6-core ATI Radeon 6950

What steps should I try to resolve this?

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up vote 1 down vote accepted

I got around it by changing .dmrc Session=ubuntu to Session=gnome-2d

I then installed the proprietary driver for my Radeon card and restored Session=ubuntu and it worked after that.

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btw, the problem still exists in 13.04, Ubuntu is broken out of the box with the open source driver on an AMD Radeon HD 6950 – Eloff May 8 '13 at 12:28

Try yo install am early version, if it works, then upgrade to latest version, also you can try a x86 version

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