SUMMARY Some keyboard shortcuts that start with Ctrl are broken, which breaks default tmux commands. Ctrl+Shift+V still pastes but tmux commands starting with Ctrl+b are broken. STEPS TO REPRODUCE 1. Run tmux or attach an existing tmux session 2. Attempt C-b d in order to detach session OBSERVED RESULT The letter "d" gets typed into the terminal and the tmux session does not attach. EXPECTED RESULT The tmux session should detach and nothing should get typed into the terminal. SOFTWARE/OS VERSIONS Windows: N/A macOS: N/A Linux/KDE Plasma: openSUSE Tumbleweed 20200417 (available in About System) KDE Plasma Version: 5.18.4 KDE Frameworks Version: 5.69.0 Qt Version: 5.14.1 ADDITIONAL INFORMATION It seems to be Ctrl modifiers that are broken. Shortcuts using Shift and Alt seem to still be intact. Also tested in XTerm, which there is no issue detaching tmux sessions or using the Ctrl modifier in general. Konsole crashed at one point when doing Ctrl+b outside of a tmux session.
*** This bug has been marked as a duplicate of bug 419981 ***