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Timeline for Tmux root bind-key won't move up

Current License: CC BY-SA 4.0

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Sep 15 at 22:00 vote accept Canadian Luke
Sep 14 at 14:44 answer added Canadian Luke timeline score: 1
Sep 14 at 8:30 comment added cas Comments aren't answers and ideas aren't property. If I'm too slow, busy, lazy and/or disinterested to turn my comment into an answer, that's my own fault. I have no objection if someone, including the OP, uses an idea from my comment in a real answer. And this Q will hang around forever unless it gets an answer that is accepted. BTW, it's perfectly OK on this site for someone to answer their own question and accept their own answer.
Sep 14 at 7:30 comment added Kamil Maciorowski But what exactly was the issue? The idea something was intercepting the keystroke appeared in the very first comment, credit to @cas. Or was it about misconfigured terminal emulator?
Sep 14 at 0:52 comment added Canadian Luke OK, that was the issue. Do you want to make that an answer and I'll accept? @KamilMaciorowski
Sep 13 at 19:54 comment added Kamil Maciorowski Well, this means either something indeed intercepts Meta+Up, or the keystroke does get to the terminal emulator but the terminal emulator itself is set up to pass nothing instead of the right sequence of bytes (which is ^[[1;3A). Please retry in another terminal emulator and report back.
Sep 13 at 18:28 comment added Canadian Luke @KamilMaciorowski M-Down shows ^[[1;3B. M-Up shows nothing
Sep 13 at 7:03 comment added Kamil Maciorowski In your usual terminal emulator, but outside of tmux, run cat, then press Meta+Down; what characters does the line discipline print? Press Enter for readability, then Meta+Up; what characters does the line discipline print now?
Sep 13 at 3:30 comment added Canadian Luke Confirmed with screenkey - Alt+Up is detected, but not doing anything
Sep 13 at 3:25 comment added Canadian Luke @cas My window manager doesn't appear to be using that shortcut key, and the terminal doesn't either.
Sep 13 at 3:06 comment added cas Does your terminal app OR your window-manager/desktop-environment use Meta-Up for anything? Either of those will see, and possibly capture for their own use, all keystrokes before tmux even has a chance. Check their configurations.
Sep 13 at 2:56 history asked Canadian Luke CC BY-SA 4.0