Steam encountered an unexpected error during startup (0x3008)

steamclosed Steam clientDistro Family: Ubuntu

ValveSoftware/steam-for-linux#11822 · opened 2025-03-13 by DarrMirr · updated 2025-03-16 · 6 comments · github

DDarrMirr 2025-03-13 github

Your system information

Steam client version (build number or date): steam_client_ubuntu12 version 1741737356 (steam print out to console)
Distribution (e.g. Ubuntu): Ubuntu 24.04 64-bit
Opted into Steam client beta?: [Yes/No] -
Have you checked for system updates?: [Yes/No] Yes
Steam Logs: steam-logs.tar.gz
GPU: AMD (APU 8700G)

Please describe your issue in as much detail as possible:

Steam shows "Unexpected Transport Error" window during application launch.

Steam app gives 3 options at "Unexpected Transport Error":

Restart Steam
Restart steamwebhelper
Exit

Restart options do not help.

Steam should appload dump:
assert_20250313235135_35.dmp[9327]: file ''/tmp/dumps/assert_20250313235135_35.dmp'', upload yes: ''CrashID=bp-7843ff6a-9748-47c4-b40f-272e52250313'

Issue arose on 12 of March. A day before steam works fine.

Steps for reproducing this issue:

Launch Steam

QQetzlcoatl 2025-03-14 github

Same error (Unexpected transport error, 0x3008, etc.) here.
Ubuntu 22.04.5.
GPU - Nvidia RTX3050, driver 550.120 from distro repo.
Does some logs/dumps from my system will help in diagnostics?

Llostgoat 2025-03-14 github

@DarrMirr based on the info in console_log.txt it looks like steam can only see one side of the IPC connections between steam and steamwebhelper.

This is what it looks like on your system:

[2025-03-13 23:56:26] GetIPCConnectionDetails: /usr/bin/lsof -P -F upnR -i [email protected]:42470
[2025-03-13 23:56:26] GetIPCConnectionDetails: p8755
[2025-03-13 23:56:26] GetIPCConnectionDetails: R8619
[2025-03-13 23:56:26] GetIPCConnectionDetails: u1000
[2025-03-13 23:56:26] GetIPCConnectionDetails: nlocalhost:34411->localhost:42470  // <-- this line and up is the connection inside the steam process

And this is what it looks like on a system without the error:

[2025-03-14 10:57:51] GetIPCConnectionDetails: /usr/sbin/lsof -P -F upnR -i [email protected]:53624
[2025-03-14 10:57:51] GetIPCConnectionDetails: p1795417
[2025-03-14 10:57:51] GetIPCConnectionDetails: R1795389
[2025-03-14 10:57:51] GetIPCConnectionDetails: u1000
[2025-03-14 10:57:51] GetIPCConnectionDetails: nlocalhost:34533->localhost:53624 // <-- this line and up is the connection inside the steam process 
[2025-03-14 10:57:51] GetIPCConnectionDetails: p1795806
[2025-03-14 10:57:51] GetIPCConnectionDetails: R1795695
[2025-03-14 10:57:51] GetIPCConnectionDetails: u1000
[2025-03-14 10:57:51] GetIPCConnectionDetails: nlocalhost:53624->localhost:34533 // <-- this line and up is the connection inside the webhelper process

The logs above are printed by the steam process. And it seems like something is preventing it from enumerating the details of the 'connecting' party, i.e. steamwebhelper.

Is there any extra security setup on your system that you are aware of that could be preventing the above. E.g. AppArmor policies or something like that. Maybe running steam in a non-traditional environment?

DDarrMirr 2025-03-14 github

@lostgoat thank you for response. Indeed, I turn off anti-virus and steam has launched successfully. I have added .local/share/Steam/ubuntu12_64/steamwebhelper to exclusion list in my anti-virus. I use steam and my anti-virus together for the last year and all work fine. It is quite strange that steam suddenly is forbidden by my anti-virus.

But despite of that fact thank you for your help.

Llostgoat 2025-03-14 github

@DarrMirr can you let me know what anti-virus software you are using? I'd like to check if there is something we can do to avoid this block.

DDarrMirr 2025-03-14 github

@lostgoat Dr.Web for Linux. SpIDer Gate (module of Dr.Web) blocks steamwebhelper network activity.

QQetzlcoatl 2025-03-16 github

Confirmation that addition of ~/.local/share/Steam/ubuntu12_64/steamwebhelper to Dr.Web exclusion list solve the problem.

Nothing extracted yet.