Thanks for the bug report. In the most recent log (XorgLog.txt) it shows you're using the old broken 'intel' Xorg driver (bug 1867668). So please start by uninstalling package 'xserver-xorg-video-intel' to make sure that isn't the problem.
Please also select Wayland (usually labelled as "Ubuntu") on the login screen. Not "Ubuntu on Xorg". ** Tags added: i915 ** Package changed: xorg (Ubuntu) => linux (Ubuntu) ** Summary changed: - Screen distorted when connecting via USB-C - HDMI adapter + [i915] Screen distorted when connecting via USB-C - HDMI adapter ** Package changed: linux (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/1998709 Title: [i915] Screen distorted when connecting via USB-C - HDMI adapter To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1998709/+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