This also affects me. It seems to have a higher chance while browsing the web, regardless of the browser I use. When it freezes, nothing but the cursor responds. I am using drivers from xorg-xserver-video-ati, no proprietary driver.
Ubuntu 12.04 32bit. VAIO VGN-CR353 ATi Mobility Radeon X2300 Intel Core2 Duo T8100 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/993187 Title: ubuntu 12.04 64bit completely freezes frequently To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/993187/+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
