vmc, thank you for providing the requested information. Could you please enable IOMMU in your BIOS, advise nomodeset is still necessary, and if so, does clicking on the "X" to exit System Settings still freeze the computer?
** Tags added: needs-freeze-log -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1242767 Title: 10de:03d0 [HP Pavilion Slimline s5310y Desktop PC ] Freeze trying to exit "gnome-control-center" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1242767/+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