Public bug reported:
12.04 will automatically update to 12.04.1 if you install all the
available updates. As of our testing last week, a fully up to date
12.04.1 build still experienced the hang. The problem only affects
discrete graphics and apus with gpus in the 7000 series. The easiest way
to reproduce is to open "system settings" and try to open the sound
options. In the machines affected by the issue, the sound options icon
will hang and lock the system settings app as soon as it is clicked.
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1092951
Title:
AMD 7000 Series GPU Hangs on Ubuntu 12.04
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