I've found a fix for this issue; basically you will need to downgrade xorg and restart the X server.
Here is a link to the solution: http://blog.shevin.info/2012/05/how-to-fix-dual-monitor-freeze-in.html -- 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/989347 Title: [BUG: ../../dix/getevents.c:850 in scale_to_desktop()] black screen if second monitor is connected in HDMI. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/989347/+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
