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Can't connect after computer reboot if there's global_prep_cmd set #6024

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#6030
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Can't connect after computer reboot if there's global_prep_cmd set#6024
#6030

Description

@bgr
bgr
opened on Oct 31, 2026

Is there an existing issue for this?

  • I have searched the existing issues

Is your issue described in the documentation?

  • I have read the documentation

Is your issue present in the latest beta/pre-release?

This issue is present in the latest pre-release

Describe the Bug

When the computer is at the login screen after a reboot (so nobody had logged in yet), starting "Desktop" via Moonlight fails with "Failed to start the specified application (Error 0)" (it's probably -1 but Moonlight displays it wrongly). This used to work fine before, I only notice it now after updating to own build made from d0b4a88 (#5782).
When I clear the global_prep_cmd in sunshine.conf then I'm able to connect. This worked before by ignoring the failed execution of prep command.

Expected Behavior

Moonlight connects to the computer that rebooted and is at login screen, and has global_prep_cmd populated in sunshine.conf

Additional Context

Seems to have been broken in #4390

Before it, child.wait() didn't take an error argument and the exit code check skipped permission_denied, so the leftover permission error from the prep command that never started was ignored and the launch continued.

Host Operating System

Windows

Operating System Version

10 22H2 19045.7807

Architecture

amd64/x86_64

Package

other (self built)

GPU Type

NVIDIA

GPU Model

1050 ti

GPU Driver/Mesa Version

582.78

Capture Method

None

Apps



Log output


Debug: QueryUserToken failed, this would prevent commands from launching under the users profile.
Error: Couldn't run [c:\scripts\ss_start.bat]: System: Permission denied
Error: [c:\scripts\ss_start.bat] wait failed with error code [generic:13]


Online logs


No response
Activity
  1. ReenigneArcher commented on Oct 31, 2026 
    @ReenigneArcher
    ReenigneArcher
    on Oct 31, 2026
    Member
    Can you actually replicate this in our latest stable or beta?
  2. bgr commented on Oct 31, 2026 
    @bgr
    bgr
    on Oct 31, 2026
    Author
    Yes.
    

    [2026-10-30 12:56:03.859]: Info: Sunshine version: 2026.914.233613 commit: 63d35f702ee9e362e43263742981836ec0710384
[2026-10-30 12:56:03.860]: Info: Package Publisher: LizardByte
[2026-10-30 12:56:03.860]: Info: config: 'global_prep_cmd' = [{"do":"c:\\scripts\\ss_start.bat","undo":"c:\\scripts\\ss_end.bat","elevated":false}]
...
[2026-10-31 15:05:43.288]: Info: Executing Do Cmd: [c:\scripts\ss_start.bat]
[2026-10-31 15:05:43.288]: Debug: QueryUserToken failed, this would prevent commands from launching under the users profile.
[2026-10-31 15:05:43.288]: Error: Couldn't run [c:\scripts\ss_start.bat]: System: Permission denied
[2026-10-31 15:05:43.288]: Error: [c:\scripts\ss_start.bat] wait failed with error code [generic:13]
...
[2026-10-31 15:06:07.898]: Debug: DESTINATION :: /launch
...
[2026-10-31 15:06:07.900]: Info: Executing Do Cmd: [c:\scripts\ss_start.bat]
[2026-10-31 15:06:07.900]: Debug: QueryUserToken failed, this would prevent commands from launching under the users profile.
[2026-10-31 15:06:07.900]: Error: Couldn't run [c:\scripts\ss_start.bat]: System: Permission denied
[2026-10-31 15:06:07.900]: Error: [c:\scripts\ss_start.bat] wait failed with error code [generic:13]

  3. ReenigneArcher commented on Nov 2, 2026 
    @ReenigneArcher
    ReenigneArcher
    on Nov 2, 2026
    Member
    Can you test if the issue is resolved with #6030 ?
  4. bgr commented on Nov 2, 2026 
    @bgr
    bgr
    on Nov 2, 2026
    Author
    Tested, works fine now. I cherry-picked the fix onto my branch and made sure that no users are signed in, it connected:
    

    [2026-11-02 12:43:36.033]: Info: Sunshine version: 0.0.0-99fc548b commit:
...
[2026-11-02 12:44:13.632]: Debug: DESTINATION :: /launch
...
[2026-11-02 12:44:16.629]: Info: Executing Do Cmd: [c:\scripts\ss_start.bat]
[2026-11-02 12:44:16.629]: Debug: QueryUserToken failed, this would prevent commands from launching under the users profile.
[2026-11-02 12:44:16.629]: Error: Couldn't run [c:\scripts\ss_start.bat]: System: Permission denied
[2026-11-02 12:44:16.629]: Info: Executing [Desktop]
...
[2026-11-02 12:44:16.744]: Info: New streaming session started [active sessions: 1]
...
[2026-11-02 12:44:17.167]: Info: CLIENT CONNECTED

  5. ReenigneArcher
    closed this as completedin #6030on Nov 3, 2026
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