The issue only reproduced on first thunderbolt port which next to escape key.
** Attachment added: "dmesg-5.4.0-21-switch-fail.log" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1872034/+attachment/5355433/+files/dmesg-5.4.0-21-switch-fail.log -- 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/1872034 Title: [Focal] No HDMI output through thunderbolt docking station To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1872034/+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

