After switching screen with Ctrl-Alt-F1, the driver printed out some error messages, see attached photo.
I hope the attached information helps. Thank you for your assistance so far, Christopher. ** Attachment added: "crash photo.png" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1622339/+attachment/4738827/+files/crash%20photo.png -- 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/1622339 Title: System freezes after opening LibreOffice with AMD GPU and OpenGL rendering turned on To manage notifications about this bug go to: https://bugs.launchpad.net/df-libreoffice/+bug/1622339/+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

