Sounds like a kernel problem. Suspend/resume is handled in the kernel,
and restarting X does not fix the problem. Moving to kernel.
Does this problem still occur on Ubuntu 12.04.1 "Precise Pangolin"?
What about on Ubuntu 12.10 "Qantal Quetzal" beta 2?
** Package changed: xserver-xorg-video-ati (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/584714
Title:
Radeon 2600XT poor performance after suspend-to-ram
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