ConEmu: conemu-cyg-64.exe conflict with WIN10 1903 and Cygwin 3.1.1 (needs confirmation) (title updated)

I need reanimate my work on pty definitely. As not only wsl requires it…

Thanks for posting this issue - I think I’m running into the same problem and I thought I was starting to go crazy. I’m running Windows 10 1809 with Cygwin 3.1.0 but the behaviour is otherwise the same.

Looking at the release notes for Cygwin 3.1.0, they’ve added a feature that adds support for pseudo consoles in PTY: Pseudo console is a new feature in Windows 10 1809, which provides console APIs on virtual terminal. With this patch, native console applications can work in PTYs such as mintty, ssh, gnu screen or tmux.

I think this new feature might be related to the issue; if you explicitly disable pseudo console support in Windows by changing the registry value HKEY_CURRENT_USER\Console\ForceV2 from 1 to 0 and open a new {Cygwin bash} shell, everything should work fine (or at least it does for me). Note that I don’t recommend this is a permanent solution - this might break some other app on your machine that expects this feature to be enabled!

By any chance, do have a link to a changeset/checkin/PR with either the fix or the code that broke, I’m a developer but haven’t worked on this kind of stuff and am just curious. Thanks again!

The old patch which causes the issue was: https://www.cygwin.com/ml/cygwin-patches/2019-q2/msg00013.html

The revised patch is: https://www.cygwin.com/ml/cygwin-patches/2020-q1/msg00004.html

A new cygwin has not yet been released, but a developer snapshot that fixes this problem is ready. https://cygwin.com/snapshots/ Please test.

for me the 2020-01-24 works too:

[ravermeister@virusmaster 24.01.2020]$ md5sum.exe cygwin1-20200124.dll
0f481acb062a24d0b503eb1b47776234 *cygwin1-20200124.dll
[ravermeister@virusmaster 24.01.2020]$ md5sum.exe /usr/bin/cygwin1.dll
0f481acb062a24d0b503eb1b47776234 */usr/bin/cygwin1.dll
[ravermeister@virusmaster 24.01.2020]$

I downloaded cygwin1-20200212.dll for 64 bit and it also fixed the arrow key functionality. I haven’t done enough testing to see if it broke anything else, but the arrows work just fine.

I’m experiencing the same problem. I also used a similar solution like you used, @userdocs. I’m using TERM=xterm-256color, if that matters. The thing is that I’m missing a line feed every time I hit the tab key for autocompletion or the enter key.

amartinr@myhost /
$ ls
     bin/                 Cygwin.ico           etc/                 proc/                usr/
                                                                                             cygdrive/
        Cygwin-Terminal.ico  home/                sbin/                var/
                                                                           Cygwin.bat           dev/
           lib/                 tmp/

amartinr@myhost /
$ ls
     bin          Cygwin.bat  Cygwin-Terminal.ico  etc   lib   sbin  usr
cygdrive  Cygwin.ico  dev                  home  proc  tmp   var

I found out that I don’t have this problem if I use mintty, but mintty hijacks many keybindings…

set CHERE_INVOKING=1 & set "PATH=%ConEmuDrive%\cygwin64\bin;%PATH%" & C:\cygwin64\bin\mintty.exe

My problem has been fixed with cygwin 3.1.4 on Windows 10 1909.