Thanks for the bug report. This is likely to be caused by the 'nouveau' open source graphics driver. Please open the 'Additional Drivers' app and use it to install one of the proprietary NVIDIA drivers instead.
Alternatively, if you wish to debug the freeze/crash then please follow https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment ** Tags added: nouveau ** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu) ** Summary changed: - Xorg freeze + [nouveau] Xorg freeze ** Package changed: xorg-server (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Incomplete ** Summary changed: - [nouveau] Xorg freeze + [nouveau] Screen freeze -- 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/2017443 Title: [nouveau] Screen freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/2017443/+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
