Describe the bug
After rebasing from bazzite-deck:stable to bazzite:stable (KDE desktop image), the system boots successfully (Plymouth completes and quits cleanly, amdgpu driver initializes without errors, all outputs detected) but the display never comes on. GRUB and the boot log show everything succeeding up through driver init, but the SDDM login greeter (plasma-login-kwin_wayland.service) fails to acquire DRM master and gives up after ~50 seconds:
kwin_wayland[1817]: atomic commit failed: Permission denied
plasma-login-wallpaper[1854]: The PlasmaWindowManagement protocol hasn't activated in time. The client possibly got denied by kwin? Check kwin output.
Rebasing to bazzite-gnome:stable on the same hardware works fine — GPU init, display output, and full session all succeed. This isolates the issue to KWin/Plasma specifically on the desktop image, since the same GPU and driver stack work correctly under GNOME and under KDE on the deck image.
What did you expect to happen?
I expected my PC to boot to desktop.
Session Logs
(I am on mobile and cannot currently paste a log)
Hardware
CPU: AMD Ryzen 7 5700X3D
GPU: AMD Radeon RX 9070 XT (no iGPU)
Motherboard: MSI (B-series, unknown model)
RAM: 96GB
Extra information or context
Secure Boot: Disabled (setup mode)
Working image: bazzite-deck:stable (KDE, functions normally)
Broken image: bazzite:stable (KDE desktop) — fails as above
Workaround confirmed: bazzite-gnome:stable boots and displays correctly on same hardware
Full journalctl -b -1 -p err and journalctl -b -1 | grep -i amdgpu output available on request — driver initializes cleanly with VRAM, all 4 display outputs (DP-1, DP-2, HDMI-A-1, HDMI-A-2) detected, no -19 firmware errors typical of other RX 9070 XT issues. Plymouth also quits cleanly (plymouth-quit.service: Deactivated successfully) well before the failure, ruling out a DRM-master handoff conflict with the boot splash.
Describe the bug
After rebasing from bazzite-deck:stable to bazzite:stable (KDE desktop image), the system boots successfully (Plymouth completes and quits cleanly, amdgpu driver initializes without errors, all outputs detected) but the display never comes on. GRUB and the boot log show everything succeeding up through driver init, but the SDDM login greeter (plasma-login-kwin_wayland.service) fails to acquire DRM master and gives up after ~50 seconds:
kwin_wayland[1817]: atomic commit failed: Permission denied
plasma-login-wallpaper[1854]: The PlasmaWindowManagement protocol hasn't activated in time. The client possibly got denied by kwin? Check kwin output.
Rebasing to bazzite-gnome:stable on the same hardware works fine — GPU init, display output, and full session all succeed. This isolates the issue to KWin/Plasma specifically on the desktop image, since the same GPU and driver stack work correctly under GNOME and under KDE on the deck image.
What did you expect to happen?
I expected my PC to boot to desktop.
Session Logs
Hardware
CPU: AMD Ryzen 7 5700X3D
GPU: AMD Radeon RX 9070 XT (no iGPU)
Motherboard: MSI (B-series, unknown model)
RAM: 96GB
Extra information or context
Secure Boot: Disabled (setup mode)
Working image: bazzite-deck:stable (KDE, functions normally)
Broken image: bazzite:stable (KDE desktop) — fails as above
Workaround confirmed: bazzite-gnome:stable boots and displays correctly on same hardware
Full journalctl -b -1 -p err and journalctl -b -1 | grep -i amdgpu output available on request — driver initializes cleanly with VRAM, all 4 display outputs (DP-1, DP-2, HDMI-A-1, HDMI-A-2) detected, no -19 firmware errors typical of other RX 9070 XT issues. Plymouth also quits cleanly (plymouth-quit.service: Deactivated successfully) well before the failure, ruling out a DRM-master handoff conflict with the boot splash.