I install latest v3.6 kernel from 
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6-rc7-quantal/:
linux-image-3.6.0-030600rc7-generic_3.6.0-030600rc7.201209232235_i386.deb
linux-image-extra-3.6.0-030600rc7-generic_3.6.0-030600rc7.201209232235_i386.deb

everything looked good, but after 3rd reboot I got a black screen as described 
in this bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1029159

and a lot of errors in dmesg:
radeon 0000:00:01.0: couldn't schedule ib
[drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB !

after that i reboot system more than 30 times but can't reproduce that
again and all works fine

** Attachment added: "part.of.kern.log"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1058303/+attachment/3353532/+files/part.of.kern.log

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

** Tags removed: needs-upstream-testing
** Tags added: kernel-fixed-upstream

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https://bugs.launchpad.net/bugs/1058303

Title:
  linux-image-3.2.0-31-generic-pae radeon regression

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