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error with tmux on cygwin: "open terminal failed: not a terminal" #7198

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opened 2026-01-31 00:57:36 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 00:57:36 +00:00
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Originally created by @brl0 on GitHub (Mar 29, 2020).

Environment

Windows build number: [Version 10.0.19013.1102]
Windows Terminal version (if applicable):
0.10.781.0

Any other software?
Cygwin 2.901
tmux 2.6

Windows Terminal profile:

            {
                "name": "Cygwin",
                "commandline": "C:/Users/b_r_l/scoop/persist/cygwin/root/bin/bash.exe --login -i",
                "icon": "%USERPROFILE%/scoop/apps/cygwin/current/root/Cygwin-Terminal.ico"
            },

Steps to reproduce

Run tmux

Expected behavior

tmux starts

Actual behavior

Error:
open terminal failed: not a terminal

Originally created by @brl0 on GitHub (Mar 29, 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: [Version 10.0.19013.1102] Windows Terminal version (if applicable): 0.10.781.0 Any other software? Cygwin 2.901 tmux 2.6 ``` Windows Terminal profile: ``` { "name": "Cygwin", "commandline": "C:/Users/b_r_l/scoop/persist/cygwin/root/bin/bash.exe --login -i", "icon": "%USERPROFILE%/scoop/apps/cygwin/current/root/Cygwin-Terminal.ico" }, ``` # Steps to reproduce <!-- A description of how to trigger this bug. --> Run `tmux` # Expected behavior <!-- A description of what you're expecting, possibly containing screenshots or reference material. --> tmux starts # Actual behavior <!-- What's actually happening? --> Error: `open terminal failed: not a terminal`
claunia added the Resolution-Duplicate label 2026-01-31 00:57:36 +00:00
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Reference: starred/terminal#7198
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