Note: 1. It's likely all of your display ports are connected to the Intel GPU so we can probably ignore Nvidia here. To be sure please try disabling the discrete GPU in your BIOS and verify the bug still occurs.
2. If older kernels like 4.19 work then this should be assigned to the kernel. ** Package changed: xorg (Ubuntu) => linux (Ubuntu) ** Tags added: multimonitor ** Changed in: linux (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/1876534 Title: ThinkPad P72 - Very serious issues with external monitors on Thunderbolt dock To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1876534/+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