[BUG] Steam Link, video not streaming

[unknown321]

Describe the bug

I am using Steam Link on Quest 2, which was working since Sep 10 (first update enabling Link on Linux), but it stopped working after a couple of updates (unsure which ones). Currently all I get is "Video not streaming" on headset and critical error on desktop (-201).

To Reproduce

Steps to reproduce the behavior:

1. Launch SteamVR on desktop
2. Launch Steam Link on headset
3. Connect to desktop
4. "Video not streaming" error

Expected behavior

Video streaming like it used to.

System Information (please complete the following information):

• Steam client version (build number or date): 1762805486, Mon, Nov 10 10:30 PM UTC +03:00
• SteamVR version: 2.14.2
• Distribution (e.g. Ubuntu): Debian 13 (trixie)
• Steam runtime diagnostics: runtime.txt
• Steam and SteamVR logs: steam-logs.tar.gz
• Minidumps: steam-minidumps.tar.gz
• Steam Link version: 2.0.19.1684, (5001684)

Additional context

Disabling vrwebhelper (chmod -x ~/.steam/steam/steamapps/common/SteamVR/bin/vrwebhelper/linux64/vrwebhelper) allows me progress further into SteamVR starting location (the one with mountains background). I launched Thumper in VR mode, which first failed with "unable to initialize OpenXR"; SteamVR crashed shortly after. On second attempt Thumper launched successfully on desktop (although with very low framerate), game reacted to headset movements, but there was no video in the headset; SteamVR also crashed.

Logs, dumps:

steam-logs-thumper.tar.gz steam-minidumps-thumper.tar.gz

[unknown321]

Issue is still there after SteamVR 2.14.3 update.