ARM64 dev containers are not starting correctly anymore

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Since I have updated Cursor, my dev containers are not starting up properly anymore. Note that I’m using ARM64 emulation using --platform linux/arm64. The docker image gets built properly, a container gets started (I can see it with docker container list), but the editor just hangs.

Steps to Reproduce

Here’s my devcontainer.json file:

{
  "name": "devcontainer-arm64",
  "build": {
    "dockerfile": "../Dockerfile",
    "context": "..",
    "options": [
      "--platform=linux/arm64",
      "--target=build-environment"
    ]
  },
  "runArgs": [
    "--platform=linux/arm64"
  ],
  "customizations": {
    "vscode": {
      "extensions": [
        "llvm-vs-code-extensions.vscode-clangd",
        "twxs.cmake"
      ]
    }
  }
}

You can just put whatever in your Dockerfile file.

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.26
VSCode Version: 1.105.1
Commit: f628a4761be40b8869ca61a6189cafd14756dff0
Date: 2025-11-24T05:39:06.655Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Linux x64 6.8.0-88-generic

Does this stop you from using Cursor

Yes - Cursor is unusable

4

Hi @aurelien , could you share the logs from the “Remote - Dev Containers” output console and also try setting the log level to “trace”?

image
image4142×482 85.5 KB

5

Hello, I would prefer sharing these logs privately as they contain a bit of work-related sensible information. I’ll try to see if I can reproduce it with a very simple Dockerfile