I'm suddenly reminded of bug 1971146. Please try adding kernel parameter: intel_iommu=off
to /etc/default/grub (in GRUB_CMDLINE_LINUX_DEFAULT) and then run: sudo update-grub and reboot. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1969815 Title: [radeon] Dual screens started blinking from blank to another type of blank for =<1 second each state To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1969815/+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
