Describe the bug
When I launch SteamVR, I receive either error 496 or 497, with 497 being the most common. It's worth noting that it was working just fine on KDE Neon 6.5.2 before the most recent system and Mesa update; however, I have since reinstalled Neon and switched over to Kubuntu to test, and I am running in to the very same problem. The problem persists whether I am on the Beta, current, or previous branch of SteamVR.

Additionally, I have found a number of older posts talking about the very same issue, but cannot seeming find a clear answer as to what is causing it nor how to fix it.

To Reproduce
Steps to reproduce the behavior:

1. Launch SteamVR.
2. Experience error 496/497.

Expected behavior
SteamVR to launch and connect to my HMD.

System Information (please complete the following information):
Please use the latest Steam beta client and SteamVR beta for your bug reports!

• Steam client version (build number or date): Steam Client Beta - November 21st.
• SteamVR version: 2.14.3
• Distribution (e.g. Ubuntu): Kubuntu 25.10
• Steam runtime diagnostics: [generate via Help -> Steam Runtime Diagnostics in the Steam client]:

Runtime Diag.txt

• Steam and SteamVR logs: [generate by running this command in a terminal tar -zcvf ~/Desktop/steam-logs.tar.gz ~/.steam/steam/logs]

steam-logs.tar.gz

• Minidumps: [run the following command: tar -zcvf ~/Desktop/steam-minidumps.tar.gz /tmp/dumps]

steam-minidumps.tar.gz

Screenshots
1.

Additional context
I do have updates for my hardware, but I seemingly cannot get them to run; when I hover over the icons and click on 'Update Device', the message disappears and nothing happens.