Some of my many Emacs 27.5's customized keybindings do not work when I work with Ubuntu 20.04 on a Lenovo ThinkPad T15g Gen 1 with a US keyboard.
Most keybindings work, but some like super-o or super-p, Meta-! don't. When I type them on Gnome's terminal outside of Emacs, the cursor blinks. Or if I am on the navigation bar and I type them, the bar blinks. But nothing ever happens.
To start with I disabled all of Ubuntu's default keybindings (in settings and with dconf-editor), but it seems that the window manager reacts to some of my Emacs's keybindings even though they don't activate anything.
