this post was submitted on 25 Jul 2025
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Hi, i've searched high and low for a solution to this issue and can't pin it down.

PC boots normal, i land in SDDM, i put in my passwort. screen goes black for a few seconds, and then i'm back at the login manager again. if i switch to the shell, i can login without issue and using startplasma-wayland, i get my desktop and everything is fine including video and gaming, so it's probably not nvidia-driver related.

i can't really find any issues in the logfiles, so it's probably a configuration issue. i already did a distro-sync and the system is updated fully.

has anyone a tip for me?

Operating System: Nobara Linux 42 KDE Plasma Version: 6.4.2 KDE Frameworks Version: 6.15.0 Qt Version: 6.9.1 Kernel Version: 6.15.7-200.nobara.fc42.x86_64 (64-bit) Graphics Platform: Wayland Processors: 12 × AMD Ryzen 5 2600X Six-Core Processor Memory: 34 GB of RAM (33,6 GB usable) Graphics Processor: NVIDIA GeForce RTX 3070 Ti

Version

KWin version: 6.4.2 Qt Version: 6.9.1 Qt compile version: 6.9.1 XCB compile version: 1.17.0

Operation Mode: Wayland

Build Options

KWIN_BUILD_DECORATIONS: yes KWIN_BUILD_TABBOX: yes KWIN_BUILD_ACTIVITIES: yes HAVE_X11_XCB: yes

X11

Vendor: The X.Org Foundation Vendor Release: 12401008 Protocol Version/Revision: 11/0 SHAPE: yes; Version: 0x11 RANDR: yes; Version: 0x14 Composite: yes; Version: 0x4 RENDER: yes; Version: 0xb XFIXES: yes; Version: 0x50 SYNC: yes; Version: 0x31 RES: yes; Version: 0x12

Output backend

Name: DRM Atomic Mode Setting on GPU 0: true

Compositing

Compositing is active Compositing Type: OpenGL OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: NVIDIA GeForce RTX 3070 Ti/PCIe/SSE2 OpenGL version string: 3.1.0 NVIDIA 570.169 OpenGL platform interface: EGL OpenGL shading language version string: 1.40 NVIDIA via Cg compiler Driver: NVIDIA Driver version: 570.169 GPU class: Unknown OpenGL version: 3.1 GLSL version: 1.40 X server version: 1.24.1 Linux kernel version: 6.15.7 Direct rendering: Requires strict binding: no Virtual Machine: no OpenGL 2 Shaders are used

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