Application Fails to Run on Ubuntu WSL with Graphics and Sidecar Errors

[codepinto]

Description

I followed the instructions here: https://github.com/getAsterisk/claudia. I ran bun install with no issues, but the last part did not work, and I got the error shown in the screenshot. The application opens a blank white window and outputs errors related to graphics rendering and a missing sidecar file.

Actual Behavior

The application opens a blank white window and outputs the following errors in the terminal:

libEGL warning: DRI3: Screen seems not DRI3 capable
MESA: error: ZINK: failed to choose pdev
libEGL warning: egl: failed to create dri2 screen
libEGL warning: failed to open /dev/dri/renderD128: Permission denied
[2025-07-04T19:27:05Z ERROR claudia::commands::claude] Failed to execute sidecar: No such file or directory (os error 2)

Additional Context

• I am using Ubuntu on WSL, which may have limitations with GPU access and hardware acceleration.
• The permission error for /dev/dri/renderD128 suggests potential issues with graphics rendering in WSL.
• The missing sidecar file error indicates that a required binary or resource was not found, possibly due to a build or configuration issue.

Request for Assistance

To help diagnose the issue, could the developers provide guidance on:

• Any specific requirements or configurations needed to run Claudia in a WSL environment?
• How to properly set up GPU access or handle graphics rendering in WSL?
• Ensuring that all necessary sidecar files are generated during the build process?

Please let me know if there are any logs or outputs I can provide to further assist in troubleshooting.

[MayurVirkar]

I am also facing issue with WSL.
Sidecar + i get "Failed to send prompt" error.
For any model.

[MayurVirkar]

Solution Found
The error occurs because Claudia cannot locate the Claude executable. Here's the fix:
Steps to resolve:

Open Claudia
Navigate to Settings → "Claude Code Installation"
Set installation type to "System"
Set path to: /usr/local/bin/claude
Restart Claudia
Important: Create a new conversation (existing conversations may throw errors)

Root cause:
The "No such file or directory" error happens when the sidecar process cannot find the Claude executable at the expected location. Setting the correct system path resolves this issue.
This should fix the Failed to execute sidecar: No such file or directory (os error 2) error for others experiencing the same issue.

[Kirchlive]

look here
Windows Support for Claudia - Community Fix Available 4.2 FINAL #78

and here
https://github.com/Kirchlive/Claudia-For-Windows

[123vivekr]

Thanks for reporting. The latest commit should fix the sidecar issues. Please check.

[codepinto]

Thanks for reporting. The latest commit should fix the sidecar issues. Please check.

@123vivekr

I am not getting the sidecar issue anymore but I am still seeing a blank white screen. Any ideas as to why this is occurring?

[codepinto]

The blank screen on launch is caused by a graphics rendering issue where the app is denied permission to use the GPU for hardware acceleration. This often produces errors in the terminal like MESA: error: ZINK: failed to choose pdev or Failed to open /dev/dri/renderD128: Permission denied.

A direct workaround is to force software rendering by launching the application with the following command:

Bash

WEBKIT_DISABLE_COMPOSITING_MODE=1 ./src-tauri/target/release/claudia
This allows the UI to render correctly by using the CPU instead of the GPU.

(Solution found with the help of Gemini, a large language model from Google.)

[MayurVirkar]

I am also getting blank screen time to time.
Not at start but suddenly in the middle of work.
Only option is to restart claudia, nothing else works.

[MayurVirkar]

PS: I am getting
D3D12: Removing Device.
Just before the screen goes blank.