So I just solved this issue by installing "ATI binary X.Org driver" from Ubuntu Software Centre (for some reason drivers weren't showing up in the normal System > Administration > Hardware Drivers.
However I no longer have any desktop effects but I don't really care. Note that even before I installed this driver, disabling desktop effects did not fix the problem. I guess this means that the problem is something to do with the default radeon driver (I have a radeon x800) and/or some special way in which thunderbird displays. -- Xorg eats processor cycles while waiting for slow Internet https://bugs.launchpad.net/bugs/297143 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in ubuntu. _______________________________________________ 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
