TUI freezes for ~10 seconds periodically on WSL2 (regression in v1.0.129)

[alhnesn]

Description

OpenCode TUI freezes for 2-10 seconds periodically while typing or scrolling on WSL2. Input is buffered during the freeze and appears after it resolves. The issue does not occur on native Windows.

Environment

Component	Details
OS	WSL2 Ubuntu 24.04 (kernel 6.6.87.2-microsoft-standard-WSL2)
OpenCode versions tested	1.0.128 (works), 1.0.129+ (freezes)
Terminals tested	Windows Terminal, WezTerm (both freeze)
Filesystem	Tested on both /mnt/c/ and native Linux filesystem (~/) - both freeze

Regression

Binary search identified the regression:

• 1.0.128: No freezing
• 1.0.129: Freezing starts

Relevant change in 1.0.129 changelog:

Bumped opentui to v0.1.55

What this is NOT

• Not SIGPWR spam (issue Mouse Input Spam / SIGPWR Signal Storm in WSL2 #5168) - no SIGPWR signals in strace
• Not 9P filesystem - freezes on native Linux filesystem too
• Not terminal-specific - happens on multiple terminals
• Not Bun-specific - also tested with npm installation, same issue

Steps to Reproduce

1. Install OpenCode v1.0.129+ on WSL2 Ubuntu
2. Run opencode in any directory
3. Type or scroll in the TUI
4. Observe periodic 2-10 second freezes

Workaround

Use version 1.0.128

OpenCode version

1.0.144 - 1.0.128

Steps to reproduce

1. Install OpenCode v1.0.129+ on WSL2 Ubuntu
2. Run opencode in any directory
3. Type or scroll in the TUI
4. Observe periodic 2-10 second freezes

Screenshot and/or share link

No response

Operating System

WSL Ubuntu 24.04

Terminal

Windows Terminal, Wezterm

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Mac unresponsive, significant lag #5130: Mac unresponsive, significant lag - Shows similar TUI freezing/responsiveness problems in opentui, with input and progress bar freezing
• TUI hangs when shell outputs massive log #4239: TUI hangs when shell outputs massive log - Opentui-related hanging issue suggesting threading/event handling problems
• Bug: opencode run and TUI exits hang on v0.15+ #3213: Bug: opencode run and TUI exits hang on v0.15+ - Earlier WSL2-specific hang/freeze regression with similar symptoms
• Mouse Input Spam / SIGPWR Signal Storm in WSL2 #5168: Mouse Input Spam / SIGPWR Signal Storm in WSL2 - WSL2-specific issue that could relate to input/event handling problems
• Opencode freezes when pressing option + left arrow key on MacBook with high CPU usage #2688: Opencode freezes when pressing option + left arrow key on MacBook - Keyboard input triggering TUI freezes with similar symptom patterns

Feel free to ignore if none of these address your specific case.

[rekram1-node]

@kommander maybe related to ur changes?

[kommander]

I'll check

[kommander]

@alhnesn are you on windows 10 by any chance? I can't reproduce reliably on win11.

[simanga-dev]

I am on windows 11, I was so scared to open a issue but I have been trying to find solution, tried deleted and all the installation method but the issue still exist

[simanga-dev]

~ ❯ opencode -v
1.0.150

[kommander]

No need to be scared. I heard of similar issues on win10 that's why I ask. I am trying to debug, but can't really reproduce it on my system.

[simanga-dev]

In my case is worse... I just learned that I can disable auto update because the latest version is not usable... if the is something that you need specific to be able to debug the issue, I can assist.

[kommander]

1.0.127 works well? I am trying to dig through the commits but didn't find anything yet that could affect it really.

[CountElqyd]

I tested v1.0.127 on wsl2 ubuntu.. seems too work well too. Freezing issues for on wsl2 started on v1.0.129 and above.

[simanga-dev]

Similar behaviour > I tested v1.0.127 on wsl2 ubuntu.. seems too work well too. Freezing issues for on wsl2 started on v1.0.129 and above.

[alhnesn]

@alhnesn are you on windows 10 by any chance? I can't reproduce reliably on win11.

I am on Windows 11:

PS C:\Users\Alihan> wsl --version
WSL version: 2.6.2.0
Kernel version: 6.6.87.2-1
WSLg version: 1.0.71
MSRDC version: 1.2.6353
Direct3D version: 1.611.1-81528511
DXCore version: 10.0.26100.1-240331-1435.ge-release
Windows version: 10.0.22631.6199

---

Also v1.0.127 works well and I am currently using v1.0.128 without any problems.