If the mouse pointer is moving then Xorg is working fine. The rest of the shell being frozen means it is the 'gnome-shell' process that is frozen.
** Tags added: bionic ** Package changed: xorg (Ubuntu) => gnome-shell (Ubuntu) ** Summary changed: - x session freezes randomly + Gnome Shell freezes randomly -- 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/1807534 Title: Gnome Shell freezes randomly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1807534/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

