mintty -p @N not opening on correct monitor

[smacdonald-kai]

Existing issues matching what you're seeing

• I was not able to find an open or closed issue matching what I'm seeing

Git for Windows version

git version 2.53.0.windows.1
cpu: x86_64
built from commit: a5512bdee37ed7142c233d21e2d347ffc4860ff3
sizeof-long: 4
sizeof-size_t: 8
shell-path: D:/git-sdk-64-build-installers/usr/bin/sh
rust: disabled
feature: fsmonitor--daemon
gettext: enabled
libcurl: 8.18.0
OpenSSL: OpenSSL 3.5.5 27 Jan 2026
zlib: 1.3.1
SHA-1: SHA1_DC
SHA-256: SHA256_BLK
default-ref-format: files
default-hash: sha1

Windows version

Windows 11

Windows CPU architecture

x86_64 (64-bit)

Additional Windows version information

Microsoft Windows [Version 10.0.26200.7623]

Options set during installation

Editor Option: VIM
Custom Editor Path:
Default Branch Option: main
Path Option: CmdTools
SSH Option: OpenSSH
Tortoise Option: false
CURL Option: OpenSSL
CRLF Option: CRLFAlways
Bash Terminal Option: MinTTY
Git Pull Behavior Option: FFOnly
Use Credential Manager: Enabled
Performance Tweaks FSCache: Enabled
Enable Symlinks: Disabled
Enable FSMonitor: Disabled

Other interesting things

Monitor 1 is a 4K built-in monitor on my laptop. Monitors 2 and 3 are external FHD. See #6085 for configuration details.

Terminal/shell

Git for Windows' bash

Commands that trigger the issue

`mintty -p @2` or `mintty -p @3`

Expected behaviour

Terminal opens on the correct window.

Actual behaviour

Terminal opens on the wrong window.

Here's a full all-monitors screenshot with the "Identify" labels up (Dsiplay Settings -> Identify).

Opening to Monitor 1 works as expected.
Opening to Monitor 2 with mintty -p @2 opens on the Identify-ied Monitor 3.
Opening to Monitor 3 with mintty -p @3 opens on the Identify-ied Monitor 2.

So the bad behaviour is that then "opened onto" monitor is not always the expected monitor.

Repository

No response

[dscho]

@smacdonald-kai can you reproduce this with a regular Cygwin's mintty.exe?

[smacdonald-kai]

@smacdonald-kai can you reproduce this with a regular Cygwin's mintty.exe?

Yes. While it looks like I nuked Cygwin entirely (C:\cygwin64 is empty except for install logs), I have an archived copy at hand.
The mintty.exe's Properties -> Details -> File version is 3.7.6.0 . I have no idea how old that might be.

Reported behaviour is present with Cygwin's mintty.exe.

[smacdonald-kai]

I'm working from home today. My setup is similar, two external 1920 x 1080 monitors, but, Windows Identifys them as 2, 3, opposite of the above screenshot where they are 3, 2.

The problem behaviour remains; -p @2 opens on Monitor 3 and vice versa. This also happens with the old copy of Cygwin mintty I have.

I did some digging, I wasn't able to find out how Windows Identify works exactly, how it decides to number the monitors.