I can also confirm this bug in ubuntu 20.04.5 / gnome version 3.36.8 / X11. Turning the pointer location feature off (gnome-tweaks), the left control key is working again.
It happens in remote sessions only, in particular with the citrix workspace app. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1872230 Title: The left Ctrl key does not work with key combos when using pointer location in Xorg sessions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1872230/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs