I've the same problem, it happen often when I log in GNome first time and then sometimes when I'm using VmWare and switch from Vm and host (physical machine).
$ ubuntu-bug xorg --> [5569:5569:0114/073520:ERROR:nss_util.cc(819)] After loading Root Certs, loaded==false: NSS error code: -8018 ATTENTION: default value of option force_s3tc_enable overridden by environment. Created new window in existing browser session. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/987498 Title: Unity/compiz freeze but mouse still move To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/987498/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

