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tmux in ssh session does not receive ctrl+space prefix #6077

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opened 2026-01-31 00:29:16 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 00:29:16 +00:00
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Originally created by @ghost on GitHub (Jan 21, 2020).

Environment

Windows build number: Microsoft Windows [Version 10.0.18362.418]
Windows Terminal version (if applicable): 0.8.10091.0

Any other software?
Remote Linux machine (Ubuntu 19.10 having ssh-server and tmux installed)

Steps to reproduce

Open Windows Terminal, SSH to the remote Linux machine, start tmux with bellow configuration (in tmux.conf) - this changes the tmux default keyboard prefix from Ctrl+B to Ctrl+Space.

unbind C-b
set-option -g prefix C-Space
bind-key C-Space send-prefix

Expected behavior

Ctrl+Space, % - should split into panes.

Actual behavior

Ctrl+Space, % - it does not register the Ctrl+Space prefix, the terminal types the '%' character.
If the above configuration is commented out and tmux restarted, the default prefix Ctrl+B is registered and works as intended.

Originally created by @ghost on GitHub (Jan 21, 2020). <!-- 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨 I ACKNOWLEDGE THE FOLLOWING BEFORE PROCEEDING: 1. If I delete this entire template and go my own path, the core team may close my issue without further explanation or engagement. 2. If I list multiple bugs/concerns in this one issue, the core team may close my issue without further explanation or engagement. 3. If I write an issue that has many duplicates, the core team may close my issue without further explanation or engagement (and without necessarily spending time to find the exact duplicate ID number). 4. If I leave the title incomplete when filing the issue, the core team may close my issue without further explanation or engagement. 5. If I file something completely blank in the body, the core team may close my issue without further explanation or engagement. All good? Then proceed! --> <!-- This bug tracker is monitored by Windows Terminal development team and other technical folks. **Important: When reporting BSODs or security issues, DO NOT attach memory dumps, logs, or traces to Github issues**. Instead, send dumps/traces to secure@microsoft.com, referencing this GitHub issue. If this is an application crash, please also provide a Feedback Hub submission link so we can find your diagnostic data on the backend. Use the category "Apps > Windows Terminal (Preview)" and choose "Share My Feedback" after submission to get the link. Please use this form and describe your issue, concisely but precisely, with as much detail as possible. --> # Environment ```none Windows build number: Microsoft Windows [Version 10.0.18362.418] Windows Terminal version (if applicable): 0.8.10091.0 Any other software? Remote Linux machine (Ubuntu 19.10 having ssh-server and tmux installed) ``` # Steps to reproduce Open Windows Terminal, SSH to the remote Linux machine, start tmux with bellow configuration (in tmux.conf) - this changes the tmux default keyboard prefix from Ctrl+B to Ctrl+Space. ```none unbind C-b set-option -g prefix C-Space bind-key C-Space send-prefix ``` # Expected behavior Ctrl+Space, % - should split into panes. # Actual behavior Ctrl+Space, % - it does not register the Ctrl+Space prefix, the terminal types the '%' character. If the above configuration is commented out and tmux restarted, the default prefix Ctrl+B is registered and works as intended.
claunia added the Resolution-Duplicate label 2026-01-31 00:29:16 +00:00
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Reference: starred/terminal#6077
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