I am seeing similar on Kinoite with the flatpak - I am not sure if perhaps Plasma changed/regressed DRM leasing
edit: might be related to https://bugs.kde.org/show_bug.cgi?id=507677
Its been marked as a high priority
Just chiming in that I also have the same issue. And I am also running Nobara 42 (Fedora).
I am also getting a popup with the following error:
Steam VR failed initialization with error code VRInitError_[PC_CompositorInvalid ConnectResponse: "Shared IPC Compositor Invalid Connect Response (307)"
Please verify SteamVR is properly installed and try again.
In my case I'm using an HTC Vive.
Same issue with Valve Index on Pop!_OS 22.04 LTS. Error 497, as well as Shared IPC Compositor Connect Failed (306) error.
I got the same issue on Gentoo Linux with my Valve Index.
When starting SteamVR there are a few flickers and then the error shows:
Failed to connect to window manager. SteamVR failed to connect to the window manager. You may need to restart your session or SteamVR. (497)
SteamVR shows Headset, Controllers and Base Stations as green. When trying to ignore the error and trying to start e.g. the room setup the Headset and Controllers are showing offline and this error appears: SteamVR failed initialization with error code VRInitError_IPC_CompositorInvalidConnectResponse: "Shared IPC Compositor Invalid Connect Response (307)". Please verify SteamVR is properly installed and try again.
Restarting PC, restarting Valve Index, reinstalling Steam/SteamVR does not help.
Steam Client version: 1763795278
SteamVR version: 2.14.3 (beta branch), 2.13.7 (release branch), 2.12.14 (previous branch)
Distribution:
Gentoo Linux x86_64
6.17.8-gentoo-dist
KDE Plasma 6.5.3
Display Server: Wayland
CPU: AMD Ryzen 7 5800X (16) @ 4.85 GHz
GPU: AMD Radeon RX 6900 XT [Discrete]
Memory: 125.69 GiB
Filesystem: btrfs
SteamVR System Report:
SteamVR-2025-11-23-PM_07_35_27.txt
Edit:
I got a very helpful reply here. After downgrading mesa to 25.2.7 everything works again.
Same problem here on Manjaro. It happened with the last major update. I tried to downgrade Mesa from 25.3.1 to 25.2.7, but it did not resolve the problem.
Switching to SteamVR beta and previous did not resolve the problem.
Gnome 49
6.17.11-1-MANJARO
Wayland
AMD Radeon™ RX 9070 XT
AMD Ryzen™ 9 5900X × 24
Hello @Fl0ux, your runtime diagnostics says that the mesa downgrade did not take effect. You're experiencing #836.
My bad, I had to downgrade vulkan-mesa-device-select and vulkan-radeon in addition to mesa.
Thanks
Hello,
I have the same underlying problem here on Nobara 43, although I'm not able to downgrade the mesa-drivers.
A little bit of backstory: I used to have a NVIDIA GPU, which worked fine. Now I just got a AMD RX 9070 XT and switched all drivers, and also tried installing Nobara on a different SSD without all nvidia packages, but to the same result.
If I try to downgrade from mesa-25.3.1 to mesa-25.2.7 as mentioned in the posts above, my system also wants to uninstall Steam. Also the other way around, if I try to reinstall Steam with the downgraded mesa, it wants to update to mesa-25.3.x, as if it were a hard dependency.
I also tested all combinations of SteamVR beta and previous branch, in addition to all Steam Runtime 3.0 (sniper), beta and previous branch.
NonVR Steam games work just fine. Can someone help, please?
Steam Client version: 1763795278
SteamVR version: 2.14.4 (release branch)
Distribution:
Nobara Linux 43
KDE Plasma 6.5.3
Display Server: Wayland
CPU: AMD Ryzen 7 5800X
GPU: AMD Radeon RX 9070 XT
Memory: 32 GiB
Filesystem: btrfs
Headset: Valve Index
Steam runtime diagnostics.txt
steam-logs.tar.gz
steam-minidumps.tar.gz
Nothing extracted yet.
Describe the bug
When I try to start SteamVR, I get this error:
To Reproduce
Steps to reproduce the behavior:
Expected behavior
SteamVR starts
System Information (please complete the following information):
Please use the latest Steam beta client and SteamVR beta for your bug reports!
Screenshots
Additional context
VR Headset is Valve Index if relevant