Cursor flickering when entering text inside of a tmux session

[antmelon]

Describe the bug
When using a text form such as the commit popup inside of a tmux session, the cursor will flicker at random points on the gui while typing. Outside of a tmux session this behavior is not seen

To Reproduce
Steps to reproduce the behavior:

1. Launch tmux session
2. Open Lazygit and enter a text popup such as the commit form
3. When typing screen tare/cursor flicker can be seen

Expected behavior
No random cursor flashing should be happening on GUI

Version info:
lazygit commit=3675570a391b1a49ddd198b4c7e71e17701d4404, build date=2024-03-23T09:09:11Z, build source=binaryRelease, version=0.41.0, os=linux, arch=amd64, git version=2.25.1
git version 2.25.1

[laurentS]

I'm observing the same issue, both with lazygit 0.41 and 0.42, both downloaded from the release page (linux_x84_64 builds), running on debian sid. I did not see this problem before, so it's likely a regression in 0.41. As OP, I only see the flickering inside tmux. I use alacritty as a term, but that's probably unrelated.

Current lazygit version: commit=6fcb7eb8bb616c170506312870b3bf15f3dbe37c, build date=2024-05-19T10:15:28Z, build source=binaryRelease, version=0.42.0, os=linux, arch=amd64, git version=2.43.0

[Kaarel]

Same experience on Windows Terminal. Typing into the "Commit summary" is laggy and flickery. See the attached gif. It's not bad recording quality or slow network, this is how it actually looks and feels.

Lazygit version: commit=6fcb7eb8bb616c170506312870b3bf15f3dbe37c, build date=2024-05-19T10:15:28Z, build source=binaryRelease, version=0.42.0, os=windows, arch=amd64, git version=2.45.2.windows.1

[peterlandry]

Same issue with zellij on Mac.

[juanibiapina]

It seems to me @antmelon and @Kaarel are reporting two different symptoms. I have the flickering reported by @antmelon when running inside tmux, but the typing slowdown reported by @Kaarel happens when running inside tmux -> nvim terminal in NixOS only (since I don't need this setup right now I didn't do further tests). The two issues may not be related.

Cases:

• alacritty -> lazygit: working ✔️
• ghostty -> lazygit: working ✔️
• alacritty -> tmux -> lazygit: flickering ⚠️
• ghostty -> tmux -> lazygit: flickering ⚠️
• alacritty -> tmux -> nvim terminal -> lazygit: slow typing ❌

[stefanhaller]

Could you test this again with current master? It may (or may not) be improved by the merge of #4166.

[Kaarel]

No change in behaviour for me.

lazygit --version:
commit=91cb1ff29a01fdf643ccc38b97fd816b2a097bec, build date=2025-01-11T04:06:07Z, build source=binaryRelease, version=0.45.0, os=windows, arch=amd64, git version=2.47.1.windows.1

Windows Terminal:
Version: 1.21.3231.0

Note that the typing issue (illustrated by the image above) is present in LazyGit when I run it from Windows Terminal, cmd, Mingw64 based Git Bash (comes with Git for Windows). Typing in each of these respective shell prompts is fine. Typing in other applications (eg neovim, yazi) run from within each of these shells also has no issues. Only seems to affect LazyGit.

If it helps, similar laggyness/flickering is occurring when just navigating in LazyGit panels eg scrolling up and down commit log or keybindings help panel. Makes the entire user experience feel laggy.

[juanibiapina]

Both bugs still happen on master.

Btw, it was so easy to run! This project is a great inspiration to me for this and other reasons.

[GitMurf]

@Kaarel same issues for me in windows terminal! I thought it was just “my computer” so I’ve just put up with it. But recently I tried lazygit in wsl2 via windows terminal and it is buttery smooth and both issues mentioned above are non existent.

Can you try wsl via windows terminal and see if it also works fine for you?

[Kaarel]

In WSL it works fine. Native Windows version has the issue. I have git repos in Windows and in WSL.

[GitMurf]

In WSL it works fine. Native Windows version has the issue. I have git repos in Windows and in WSL.

Yep same exact thing for me. And it only started the last couple months.

[spencer-scw]

Same issue with zellij on Mac.

I'm noticing this too, but only when a fetch is ongoing. I suspect that the draw rate on the fetch progress spinner is interfering with the cursor's position and causing a flickery experience. This happens for any text entry field (commit messages, filter searches, etc.) I'm using the latest build of Lazygit in Zellij / Alacritty / MacOS.