Thanks for the bug report. It appears there was a kernel update a couple of days before this bug was opened so I would investigate that first.
Please use the Escape key to access the boot menu and try selecting an older kernel. Or try a different kernel version from here: https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D ** Package changed: xorg (Ubuntu) => ubuntu ** Summary changed: - Xorg freeze + System freeze ** Changed in: ubuntu Status: New => Incomplete -- 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/1925676 Title: System freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1925676/+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