I had a similar effect on an AMILO Pi 2550 (Intel T8100 Core 2 Duo processor). The problem was not related to X, but seems to be caused by problems associated with deeper sleep states of the processors (BIOS bug?). Adding "processor.max_cstate=1" to the kernel boot parameters solved the issue.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to fglrx-installer in Ubuntu. https://bugs.launchpad.net/bugs/669535 Title: desktop mysteriously freezes until keyboard or mouse input To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/669535/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp