Antigravity 1.23.2 freezes shortly after startup on Fedora 44 (Electron renderer becomes permanently unresponsive)

Google Antigravity
1

Antigravity Linux Bug Report

Summary

Antigravity consistently freezes approximately 10–30 seconds after launch on Fedora 44 Workstation x86_64.

The application starts successfully, creates its window, initializes the extension host, and completes startup tasks, but the renderer eventually becomes unresponsive. The main process repeatedly reports:

  • CodeWindow: detected unresponsive

  • UnresponsiveSampleError

  • Failed to flush on shutdown

The issue occurs even with:

  • GPU acceleration disabled

  • Wayland disabled (running under X11)

  • all extensions disabled

  • a completely fresh user profile

This appears to be an application-side renderer/workbench issue rather than an operating system, graphics driver, or Electron startup problem.

Environment

Operating System

  • Fedora Linux 44 Workstation

  • x86_64

Desktop

  • GNOME

  • Tested under:

    • Wayland

    • X11 (via ELECTRON_OZONE_PLATFORM_HINT=x11)

Hardware

CPU:

  • AMD Ryzen (Renoir platform)

Graphics:

  • AMD Radeon Graphics (Mesa 26.1.4)

  • NVIDIA GeForce RTX 3050 Mobile

OpenGL renderer:

AMD Radeon Graphics (radeonsi, renoir)
Mesa 26.1.4

GPU functionality was verified independently using glxinfo.

Antigravity Version

RPM package:

Version: 1.23.2
Release: 1776330658.el8
Architecture: x86_64

Electron version (from Crashpad annotations):

Electron 39.2.3

Repository

Installed from:

https://us-central1-yum.pkg.dev/projects/antigravity-auto-updater-dev/antigravity-rpm

Repository observations:

  • GPG verification disabled

  • Repository metadata timestamp appears invalid (1961)

  • RPM metadata contains placeholder URL:

https://antigravity.gooogle

Product configuration also contains placeholder values such as:

"updateUrl": "https://example.com"

These may indicate that this RPM was produced from an internal/development packaging pipeline.

Expected Behaviour

Antigravity should remain responsive after startup.

Actual Behaviour

Application launches normally.

Within approximately 10–30 seconds:

CodeWindow: detected unresponsive

followed by:

UnresponsiveSampleError

Eventually:

Failed to flush on shutdown

The UI becomes permanently frozen.

Steps to Reproduce

  1. Install Antigravity 1.23.2 RPM.

  2. Launch normally.

Freeze occurs consistently.

Also reproduced with:

--disable-gpu


--disable-extensions


--user-data-dir=/tmp/ag-test


--no-sandbox


ELECTRON_OZONE_PLATFORM_HINT=x11

The behaviour is identical under all tested configurations.

Diagnostics Performed

1. Shared libraries

Checked with:

ldd /usr/share/antigravity/antigravity

Result:

No missing shared libraries.

2. OpenGL

Verified using:

glxinfo -B

OpenGL initializes correctly.

Mesa is functioning normally.

3. GPU acceleration

Tested with:

--disable-gpu

Result:

Renderer still freezes.

4. Wayland vs X11

Tested:

Wayland

and

ELECTRON_OZONE_PLATFORM_HINT=x11

Same issue.

5. Clean user profile

Tested with:

--user-data-dir=/tmp/ag-test

Fresh profile created successfully.

Startup migrations complete successfully.

Renderer still freezes.

6. Extensions

Tested:

--disable-extensions

Extension host exits normally.

Freeze still occurs.

7. Core dumps

Multiple crashes recorded.

Typical crash:

SIGSEGV

inside an Electron utility process.

Because release binaries are stripped, stack traces are not symbolicated.

8. strace

Attached to the main Electron process while frozen.

Observed continuous activity:

  • sendto()

  • recvmsg()

  • epoll_wait()

  • futex()

  • read()

  • write()

The process is not blocked waiting on filesystem, D-Bus, Wayland, X11, or other kernel resources.

Instead, it appears to be continuously processing IPC.

This suggests the renderer is busy (or spinning) rather than deadlocked inside the kernel.

Logs

Repeated messages include:

CodeWindow: detected unresponsive


UnresponsiveSampleError


Failed to flush on shutdown

Renderer stack traces repeatedly point into:

workbench.desktop.main.js

No extension-specific failures were observed.

Observations

Evidence suggests:

  • Electron launches correctly.

  • Chromium initializes successfully.

  • GPU initialization succeeds.

  • Extension host starts successfully.

  • Language server starts successfully.

  • The renderer eventually becomes permanently unresponsive.

The issue reproduces under:

  • Wayland

  • X11

  • GPU disabled

  • Extensions disabled

  • Fresh profile

This strongly suggests the problem is inside the Antigravity workbench/renderer logic rather than Linux graphics, Electron startup, or user configuration.

Files Available

I can provide:

  • renderer logs

  • coredump information

  • strace output

  • startup logs

  • Electron crash logs

upon request.

Impact

The application is currently unusable because the renderer freezes shortly after every launch.

The issue is fully reproducible on every startup.