That doesn't sound like a bug. Modal shell dialogs like for network connections are meant to be modal so you can't access other features like powering off.
Please: 1. Try to explain the problem in different words. 2. Uninstall all of these extensions: 'pixel-sa...@deadalnix.me', 'sto...@infinicode.de', 'hidetop...@mathieu.bidon.ca', 'screenshotlocations.ti...@linux.com', 'cpufreq@konkor', 'temperature@xtranophilist', 'system- moni...@paradoxxx.zero.gmail.com', 'TilixDropdown@ivku...@gmail.com' then log in again and tell us if the problem still happens. ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1928556 Title: When opened modal password input window power off button don't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1928556/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs