Your system information

• Steam client version (build number or date): 1:1.0.0.81
• Distribution (e.g. Ubuntu): Debian 12 (Bookworm)
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes
• Steam Logs: [generate by running this command in a terminal tar -zcvf ~/Desktop/steam-logs.tar.gz ~/.steam/steam/logs]
• GPU: Nvidia

Please describe your issue in as much detail as possible:

• Steam fails to start, reporting the error:

...
[2025-05-07 02:01:42] Downloading manifest: https://client-update.steamstatic.com/steam_client_ubuntu12
src/steamUI/steamuisharedjscontroller.cpp (686) : Failed creating offscreen shared JS context
src/steamUI/steamuisharedjscontroller.cpp (686) : Failed creating offscreen shared JS context
05/07 02:01:42 Init: Installing breakpad exception handler for appid(steam)/version(1745876290)/tid(35552)
assert_20250507020142_27.dmp[36049]: Uploading dump (out-of-process)
/tmp/dumps/assert_20250507020142_27.dmp
...

Steps for reproducing this issue:

1. Debian fresh install applying https://wiki.debian.org/NvidiaGraphicsDrivers with multiarch support.
2. Executed in a terminal dpkg -i steam_latest.deb (downloaded from http://media.steampowered.com/client/installer/steam.deb)
3. Executed in a terminal /usr/bin/steam

steam-logs.tar.gz