Unable to launch Steam for Linux. steamwebhelper?

[clickwir]

Your system information

• Steam client version (build number or date): 1733265492
• Distribution (e.g. Ubuntu): Ubuntu 24.04.1 LTS (Kubuntu)
• Opted into Steam client beta?: [Yes/No] NO
• Have you checked for system updates?: [Yes/No] YES
• Steam Logs: [generate by running this command in a terminal tar -zcvf ~/Desktop/steam-logs.tar.gz ~/.steam/steam/logs]
• GPU: Nvidia/Intel/AMD AMD RX 6600

Please describe your issue in as much detail as possible:

Describe what you expected should happen and what did happen. Please link any large code pastes as a Github Gist

shell_output.txt
steam-logs.tar.gz
system_info.txt

I had Steam open, was looking around, didn't load any games. Just looking through the Library and seeing who was online, stuff like that. Closed Steam, waited a few minutes and wanted to go back in. This time, Steam did an update to itself and then never opened. Rebooted, and I could see the icon in the system tray area but nothing would come up.

So I uninstalled Steam, deleted .steam* and .local/share/Steam, rebooted and installed the latest from the Steam website. Now I get no icon in the system tray area.

When trying to run from CLI I basically see this over and over:

steamwebhelper.sh[12001]: Using supervisor /home/user/.steam/root/ubuntu12_32/steam-runtime/amd64/usr/bin/steam-runtime-supervisor
steamwebhelper.sh[12001]: Starting steamwebhelper under bootstrap sniper steam runtime via /home/user/.local/share/Steam/ubuntu12_64/steam-runtime-sniper.sh
steamwebhelper.sh[12001]: Using CEF sandbox (try with -no-cef-sandbox if this fails)
steamwebhelper.sh[12001]: Starting steamwebhelper with Sniper steam runtime at /home/user/.local/share/Steam/ubuntu12_64/steam-runtime-sniper/_v2-entry-point
pressure-vessel-wrap[12027]: W: "opt/amdgpu/share/libdrm" is unlikely to appear in "/run/host"
exec ./steamwebhelper -lang=en_US -cachedir=/home/user/.local/share/Steam/config/htmlcache -steampid=11956 -buildid=1733265492 -steamid=0 -logdir=/home/user/.local/share/Steam/logs -uimode=7 -startcount=0 -steamuniverse=Public -realm=Global -clientui=/home/user/.local/share/Steam/clientui -steampath=/home/user/.local/share/Steam/ubuntu12_32/steam -launcher=0 -no-restart-on-ui-mode-change --valve-enable-site-isolation --enable-smooth-scrolling --password-store=basic --log-file=/home/user/.local/share/Steam/logs/cef_log.txt --disable-quick-menu --enable-features=PlatformHEVCDecoderSupport --disable-features=SpareRendererForSitePerProcess,DcheckIsFatal,ValveFFmpegAllowLowDelayHEVC
Steam Runtime Launch Service: starting steam-runtime-launcher-service
Steam Runtime Launch Service: steam-runtime-launcher-service is running pid 12292

I've let it sit there for 10 mins and nothing ever shows up. I tried running 'steam -no-cef-sandbox' but that didn't seem to change anything.

Summary: A couple hours ago, Steam was open and working fine. It did an update and now it won't open at all. I don't run it all that often, so I don't know how old it was.

Steps for reproducing this issue:

Summary: A couple hours ago, Steam was open and working fine. It did an update and now it won't open at all. I don't run it all that often, so I don't know how old it was.

[kisak-valve]

Hello @clickwir, lines like

[2025-01-04 22:27:19] ac: Unknown GPU, using 0 for raster_config
[2025-01-04 22:27:19] Cannot find target for triple amdgcn-- Unable to find target for this triple (no targets are registered)
[2025-01-04 22:27:20] [0104/222720.075228:ERROR:gpu_process_host.cc(1002)] GPU process exited unexpectedly: exit_code=139

in your webhelper-linux.txt hint towards libcef having a hard time with the AMD driver install in /opt/amdgpu.

As a quick workaround, I'd try completely closing Steam, then trying something like steam -cef-disable-gpu from a terminal. If that works, then you could try disabling GPU accelerated web views in Steam's settings to avoid the driver issue.

A longer term solution might be to look into temporarily backing out the /opt/amdgpu driver install, checking how Steam behaves, then and if that's favorable, then report your findings to that video driver vendor. Updated mesa is also available from a handful of PPAs like oibaf and kisak-mesa, but it should be noted that your current updated video driver, and these PPAs shouldn't be mixed because the combination of libraries between them is untested.

[clickwir]

Thank you for taking a look.

Tried with '-cef-disable-gpu' and didn't open. I am using the amdgpu Pro drivers from AMD so I can get OpenCL working. Also, Steam was open and seemed fine before it updated itself. So whatever the previous version of Steam was, it worked.

Here's some fresh logs from the '-cef-disable-gpu'. Right now, I need OpenCL and have to use these drivers. The opensource/mesa drivers don't work with OpenCL that I could figure out.

amdgpu_info.txt
clinfo.txt
shell_output.txt
steam-logs.tar.gz