Scroll wheel does not work in tmux in WSL

[pingzing]

Versions

ConEmu build: 170402-Preview x64
OS version: Windows 10, build 15063 (Creators Update RTM) x64
Used shell version: WSL, invoked as a new task via *"%windir%\system32\bash.exe -cur_console:p"
tmux version: 2.1
WSL Ubuntu version: 16.04

Problem description

When attempting to scroll a buffer in a WSL tab running tmux, instead of scrolling, the error chime plays, and either ~2 or ~3 is printed to the input buffer (depending on the direction scrolled).

Steps to reproduce

1. Start a new WSL ConEmu tab via bash.exe -cur_console:p (or via the task listed above)
2. Open a tmux session.
3. Generate enough output that vertical scrolling is required.
4. Attempt to use the mouse's scroll wheel.

Actual results

The Windows error chime plays, and the ~2 or ~3 is entered into the input buffer.

Expected results

The tmux buffer scrolls.

Interesting notes

Bizarrely, if I show the RealConsole, and attempt to scroll my tmux buffer in that window, it works just fine.

I can also confirm that scrolling works as expected in a plain old Powershell window that's running WSL.

[pingzing]

Apologies, there's one extra reproduction step I forgot to mention:

3.5. In tmux, enable mouse mode with tmux set mouse.

This will enable mousewheel scrolling.

[mdeguzis]

Mouse mode indeed does not work for me either. Turning off mouse mode does not help. This behavior is more clear when you split horizontally in Tmux and attempt to scroll the top or bottom pane.

[jhgorse]

I have tried various mouse configurations, including on the tmux side to no avail.
https://github.com/NHDaly/tmux-better-mouse-mode

I wonder what is the best way to debug the character escape sequences of a terminal emulator? In any case, onward.

[dmak]

I have similar issue with ConEmu 170807, which is running Cygwin ssh via conenu-cyg-32.exe, which is running tmux v2.3, which is running mc v4.8.18. In this combination mouse does not work in mc. If started without tmux, mc works fine. Scrolling also works fine in tmux. Seems like to be a tmux or mc issue (vim works fine under tmux), but I wonder if somebody can advise how to debug the issue. I don't have WSL installed, the command-line is conemu-cyg-32.exe ssh user@host.

[hansjny]

I have the same issue using ConEmu with WSL and then attempting to use the mouse with vim (mouse=a). Works fine with regular cmd or powershell.

[Maximus5]

How do you run WSL?

[tfriedel]

this is a dealbreaker for me. I'm running WSL with c:\Users\thomas\AppData\Local\Microsoft\WindowsApps\ubuntu.exe -cur_console:p -c fish

[Maximus5]

How many times I shall explain that using of connector is essential?

1. Read BashOnWindows in ConEmu
2. Download and install latest ConEmu build (180628 at the moment)
3. Run ConEmu64.exe -basic -run {bash}

[tfriedel]

thanks, it's basically working now. however quite often an event (scroll wheel or mouse click) is missed and instead some control characters appear in the console.
like:
[<3;29;1m[<0;20;1M[<3;30;1m

[Maximus5]

I'm working on improving pty interface. Until then ConEmu does what it can at most

[XA21X]

I'm having the same issue as @tfriedel, where mouse support mostly works but occasionally (sometimes very frequently) sending unrecognised escape codes instead. For me, it only happens in tmux at the prompt with mouse mode turned on, but somehow, neovim within tmux doesn't have this problem - maybe vim filters out unrecognised escape codes whereas tmux prints/types them?

I'm using Debian with fish shell (set via chsh) in WSL launched with the following command:
set "PATH=%ConEmuBaseDirShort%\wsl;%PATH%" & %ConEmuBaseDirShort%\conemu-cyg-64.exe --wsl -C~ -cur_console:pm:/mnt --distro-guid={b281fda1-fa8a-49c7-a85f-dd2cc85bec24}