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ctrl-alt-\ is ignored in WSL #16848

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opened 2026-01-31 05:25:01 +00:00 by claunia · 2 comments
claunia commented 2026-01-31 05:25:01 +00:00
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Originally created by @jeffchase on GitHub (Feb 23, 2022).

Windows Terminal version

1.11.3471.0

Windows build number

10.0.19042.1526

Other Software

WSL Debian GNU/Linux 11 (bullseye)

Emacs 27.1

Steps to reproduce

ncurses:

  1. Install ncurses-examples: sudo apt install ncurses-examples
  2. Run demo_altkeys: /usr/lib/ncurses/examples/demo_altkeys
  3. Type ctrl-alt-\

emacs:

  1. Run emacs
  2. Type C-h k (describe-key)
  3. Type ctrl-alt-\

Expected Behavior

ncurses:
Something like: 0.259 Keycode ???, name ESC-^\

emacs:
Open a new window pane that says: C-M-\ runs the command indent-region

Actual Behavior

Nothing

Originally created by @jeffchase on GitHub (Feb 23, 2022). ### Windows Terminal version 1.11.3471.0 ### Windows build number 10.0.19042.1526 ### Other Software WSL Debian GNU/Linux 11 (bullseye) Emacs 27.1 ### Steps to reproduce ncurses: 1) Install ncurses-examples: `sudo apt install ncurses-examples` 2) Run demo_altkeys: `/usr/lib/ncurses/examples/demo_altkeys` 3) Type `ctrl-alt-\` emacs: 1) Run emacs 2) Type `C-h k` (describe-key) 3) Type `ctrl-alt-\` ### Expected Behavior ncurses: Something like: `0.259 Keycode ???, name ESC-^\` emacs: Open a new window pane that says: `C-M-\ runs the command indent-region` ### Actual Behavior Nothing
claunia commented 2026-01-31 05:25:04 +00:00
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@jeffchase commented on GitHub (Feb 23, 2022):

I filed https://github.com/microsoft/WSL/issues/8069 with WSL and was told to file here.

@jeffchase commented on GitHub (Feb 23, 2022): I filed https://github.com/microsoft/WSL/issues/8069 with WSL and was told to file here.
claunia commented 2026-01-31 05:25:04 +00:00
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@zadjii-msft commented on GitHub (Feb 23, 2022):

Huh. Well, I thought this might be related to #3483, but maybe not. You might be able to work around this by binding ctrl+alt+\ to a sendInput action for \x1b\x1c temporarily, while we work on a fix.

@zadjii-msft commented on GitHub (Feb 23, 2022): Huh. Well, I thought this might be related to #3483, but maybe not. You might be able to work around this by binding `ctrl+alt+\` to a `sendInput` action for `\x1b\x1c` temporarily, while we work on a fix.
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Reference: starred/terminal#16848
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