I'm trying with live cd and the problem appears. I have read Xorg.0.log and I have found it's using radeon driver.
-- [RV530] video problem flicker unreadable hp compaq nx9420 ati radeon https://bugs.launchpad.net/bugs/537640 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati 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