[Bug 1057793] [NEW] Ubuntu 12.10 beta 2 disc fails to load properly

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When I start the live disc Ubuntu starts, but after a while the screen
becomes garbled (like 1000 ants, I could not make any screen shots). The
dock and the Dash loads. There is no mouse pointer and the screen is
garbled. After a while Ubuntu freezes and I have to make a hard reboot.

If I try to install without the live session the screen becomes garbled
after a short while, the installation process never starts and the
computer freezes like above.

The live session and installation works if I edit the kernel with
nomodeset and after installation edit again with nomodeset and install
the proprietary drivers for the graphic card. After that Ubuntu starts
properly after reboot.

The machine have worked with every *buntu since at least 8.04 so this is
a regression.

Hardware:
AMD 9650 quad-core
Nvidia GT 120 1GB

Happy to submit more information!

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: bot-comment
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Ubuntu 12.10 beta  2 disc fails to load properly
https://bugs.launchpad.net/bugs/1057793
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