This sounds like it might be bug 1767312. Please try the workarounds listed in that bug.
** Tags added: radeon ** Summary changed: - All system graphic glitch when play video + [radeon] All system graphic glitch when play video ** Package changed: xorg (Ubuntu) => ubuntu ** 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/1889289 Title: [radeon] All system graphic glitch when play video To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1889289/+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