Steam OS Build 20260824.1001 regressed Mesa to 26.1.2 before I was on mesa 26.1.8

[thomasman52]

Your system information

• Steam client version: Stable
• SteamOS version: Build: 20260824.1001 Version 3.10 Main
• Opted into Steam client beta?: [Yes/No] No
• Opted into SteamOS beta?: [Yes/No] Yes
• Have you checked for updates in Settings > System?: [Yes/No] Yes, Multiple times

Please describe your issue in as much detail as possible:

I was getting performance boost pre build 20260824.1001 version 3.10 as intel-vaapi-driver and mesa 26.1.8 mesa. Mesa extra version was a modified version 26.1.2 were rolled out in desktop mode. Now I am stuck on Mesa 26.1.2 with no updates when I switch to desktop mode

Steps for reproducing this issue:

1. Apply latest Build and Intel ANV Driver becomes 26.1.2 before update I was on 26.1.8 this applies to Mesa
2. Downgraded to beta and Stable drivers did not get updated

My Hardware:

CPU: Ryzen 5600x
GPU: Intel Arc B580 12GB Limited Edition
RAM 32 GB 3200mhz

According to the Steam OS Subreddit Mesa is now 26.1.99

Is there a way of forcing driver and Mesa updates ?

[thomasman52]

Update: I have updated to the newest build 20260826.1000 and also re-installed Steam OS and the there is still no mesa update. I understand that Main is for devs but the newest Mesa is normally where it updates first

[Sunspark-007]

SteamOS only updates as a snapshot. It's not a rolling-release. You have to wait till the next iteration is pushed to whatever channel you're on.