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Windows: severe mouse cursor lag while Codex desktop app is running #38659

Closed as duplicate
Closed as duplicate
Windows: severe mouse cursor lag while Codex desktop app is running#38659
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appIssues related to the Codex desktop appbugSomething isn't workingperformancewindows-osIssues related to Codex on Windows systems

Description

@Rabai94
Rabai94
opened on Aug 14, 2026

What version of the Codex App are you using (From “About Codex” dialog)?

The issue started after updating Codex to version 26.810.6296.0.

What subscription do you have?

ChatGPT Pro

What platform is your computer?

Windows 11 Pro, version 25H2 OS Build 26200 64-bit

What issue are you seeing?

Mouse cursor develops severe input lag while the Codex desktop app is running. Fully quitting/shutting down Codex, including the background/system-tray process, immediately restores normal mouse behavior without restarting Windows. The issue starts again after launching Codex and using it.

What steps can reproduce the bug?

Open Codex Desktop.
Start using Codex normally.
After a short period of use, the mouse cursor develops severe input lag/stuttering.
Fully quit/shut down Codex, including the background/system-tray process.
The mouse immediately returns to normal without restarting Windows.
Launch Codex again and use it; the mouse lag appears again.

What is the expected behavior?

No response

Additional information

No response

Activity

  1. Rabai94
    added
    appIssues related to the Codex desktop app
    on Aug 14, 2026
  2. github-actions
    added
    bugSomething isn't working
    windows-osIssues related to Codex on Windows systems
    performance
    on Aug 14, 2026

  3. github-actions commented on Aug 14, 2026

    @github-actions
    github-actionsBot
    on Aug 14, 2026 – with GitHub Actions
    Contributor

    Potential duplicates detected. Please review them and close your issue if it is a duplicate.

    Powered by Codex Action

  4. Rabai94
    closed this as duplicateon Aug 14, 2026

  5. Big-pandawwj commented on Aug 15, 2026

    @Big-pandawwj
    Big-pandawwj
    on Aug 15, 2026

    Same issue on Windows with Codex 26.810.6296.0 (Chromium 151.0.7922.137, app-server 0.148.0-alpha.9).

    Measured while the stutter was active:

    • ChatGPT.exe main process: ~136% CPU (about 1.1-1.5 logical cores)
    • Process read I/O: ~720-907 MB/s (avg ~837 MB/s), ~1,550-1,750 read operations/sec
    • Write I/O: negligible
    • Renderer, GPU, and codex.exe processes were near 0% CPU
    • The read loop persisted even while no agent turn was running (confirmed during a 15s blocking command with zero stream events)

    Behavior:

    • Fully quitting Codex (including tray) immediately restores normal mouse movement.
    • Restarting gives a clean baseline; the problem returns after prolonged use.
    • The earlier remote-control retry loop ("waiting to resolve remote control preference...") is not present in this case.

    Running the app elevated reportedly avoids the system-wide stutter, but I would rather not run the agent elevated as a permanent setup. Hope this helps narrow it down.

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