[Linux] 0x3008 error when starting steam

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我们还行吧 23 Oct @ 12:51am

[Linux] 0x3008 error when starting steam

ISSUE
When opening steam and after a while, a dialog is shown saying 0x3008.

OS
Arch Linux / KDE (all packages are up-to-date, and I had restarted the system)

STEPS
I have tried either
- click the icon from application menu
- or start `steam` from shell

EXPECTED
steam would start normally

< >

Showing 1-8 of 8 comments

我们还行吧 23 Oct @ 1:06am

Not sure whether the log `webhelper.txt` helps:

[2025-10-23 15:40:20] Client version: no bootstrapper found [2025-10-23 15:40:20] Startup - webhelper launched pid: 12227 commandline: ./steamwebhelper -nocrashdialog -lang=zh_CN -cachedir=/home/user/.local/share/Steam/config/htmlcache -steampid=12059 -buildid=1759461205 -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 -use_xcomposite_workaround --valve-initial-threadpool-size=4 --valve-enable-site-isolation --enable-smooth-scrolling --disable-gpu-compositing --disable-gpu --password-store=basic --log-file=/home/user/.local/share/Steam/logs/cef_log.txt --disable-quick-menu --disable-component-update --disable-features=SpareRendererForSitePerProcess,DcheckIsFatal,BlockPromptsIfIgnoredOften,ValveFFmpegAllowLowDelayHEVC [2025-10-23 15:40:20] Disabling GPU acceleration due to --disable-gpu-compositing (browser) [2025-10-23 15:40:20] Browser - launching child process with: /home/user/.local/share/Steam/ubuntu12_64/steamwebhelper --type=zygote --no-zygote-sandbox --user-agent-product=Valve Steam Client --lang=en_US.UTF-8 --user-data-dir=/home/user/.local/share/Steam/config/htmlcache --log-file=/home/user/.local/share/Steam/logs/cef_log.txt --crashpad-handler-pid=12230 --buildid=1759461205 --steamid=0 --valve-initial-threadpool-size=4 [2025-10-23 15:40:20] Browser - launching child process with: /home/user/.local/share/Steam/ubuntu12_64/steamwebhelper --type=zygote --user-agent-product=Valve Steam Client --lang=en_US.UTF-8 --user-data-dir=/home/user/.local/share/Steam/config/htmlcache --log-file=/home/user/.local/share/Steam/logs/cef_log.txt --crashpad-handler-pid=12230 --buildid=1759461205 --steamid=0 --valve-initial-threadpool-size=4 [2025-10-23 15:40:20] Browser - launching child process with: /proc/self/exe --type=gpu-process --user-agent-product=Valve Steam Client --lang=en_US.UTF-8 --user-data-dir=/home/user/.local/share/Steam/config/htmlcache --crashpad-handler-pid=12230 --buildid=1759461205 --steamid=0 --valve-initial-threadpool-size=4 [2025-10-23 15:40:20] Starting message loop [2025-10-23 15:40:20] dlmopen steamclient.so failed: steamclient.so: cannot open shared object file: No such file or directory [2025-10-23 15:40:20] Browser - launching child process with: /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --user-agent-product=Valve Steam Client --lang=en_US.UTF-8 --user-data-dir=/home/user/.local/share/Steam/config/htmlcache --crashpad-handler-pid=12230 --buildid=1759461205 --steamid=0 --valve-initial-threadpool-size=4 [2025-10-23 15:40:20] CreateBrowser 2693551806 type:12 flags:0 (-2147483648, -2147483648) 0x0 [2025-10-23 15:40:20] Browser requested transparent background, but it is not supported [2025-10-23 15:40:20] Browser - launching child process with: /proc/self/exe --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --user-agent-product=Valve Steam Client --lang=en_US.UTF-8 --user-data-dir=/home/user/.local/share/Steam/config/htmlcache --crashpad-handler-pid=12230 --buildid=1759461205 --steamid=0 --valve-initial-threadpool-size=4 [2025-10-23 15:40:20] UB-65536: AfterCreated handle:65536 type:12: (0, 0) 0x0 [2025-10-23 15:40:20] Invalid browser dimensions: 0 x 0 [2025-10-23 15:40:20] UB-65536: SetName: SP Shared JS Context [2025-10-23 15:40:20] Browser - launching child process with: /proc/self/exe --type=renderer --user-agent-product=Valve Steam Client --user-data-dir=/home/user/.local/share/Steam/config/htmlcache --crashpad-handler-pid=12230 --buildid=1759461205 --steamid=0 --valve-initial-threadpool-size=4

Xenophobe 23 Oct @ 7:25am

Did this start after an update to the steam client beta or after an update to Arch? Try rolling back to the last system snapshot and see if the issue persists ... it may be an Arch issue rather than a steam issue.

我们还行吧 23 Oct @ 8:36am

It happened to me a few times, one yesterday, a few earlier, and one today. Usually I don't shutdown my desktop, and I don't update my system frequently even though I'm riding a rolling distro. The situation was: steam still worked, but I cannot create a local lobby in Dota 2. Then I thought maybe I should restart steam, so I closed steam, reopened, then I saw

0x3008

. A reboot helped me yesterday, but it didn't help me today. When I said "up-to-date", it didn't mean I really upgraded the packages, I just synced the database and ran

checkupdates

Originally posted by Xenophobe:
Did this start after an update to the steam client beta or after an update to Arch? Try rolling back to the last system snapshot and see if the issue persists ... it may be an Arch issue rather than a steam issue.

我们还行吧 23 Oct @ 9:15am

UPDATE: after another reboot, no 0x3008 this time. Didn't update the system, or change any settings.

Xenophobe 23 Oct @ 9:33am

just found the following:
https://gtm.steamproxy.vip/discussions/forum/1/592891465952144378/
it may be something in the steam linux beta client having an update file corruption issue ...

我们还行吧 26 Oct @ 1:16am

I found the cause of two issues: the Steam client wouldn't start, and I couldn't create a Dota 2 lobby. I'm running KVM virtual machines using NAT networking. To enable network communication, I had added:

sudo iptables -t nat -A POSTROUTING -j MASQUERADE

I'm not sure why, but removing that rule fixed everything:

sudo iptables -t nat -D POSTROUTING -j MASQUERADE

Everything is back to normal - I've verified it multiple times on both GNOME and KDE.

Xenophobe 26 Oct @ 9:01am

Originally posted by 我们还行吧:
I found the cause of two issues: the Steam client wouldn't start, and I couldn't create a Dota 2 lobby. I'm running KVM virtual machines using NAT networking. To enable network communication, I had added:

sudo iptables -t nat -A POSTROUTING -j MASQUERADE

I'm not sure why, but removing that rule fixed everything:

sudo iptables -t nat -D POSTROUTING -j MASQUERADE

Everything is back to normal - I've verified it multiple times on both GNOME and KDE.

Maybe reporting this on the steam for linux github with your findings so far would be a good idea, if nothing else it will bring it to Valve's attention.
https://github.com/ValveSoftware/steam-for-linux/issues