This morning I was on kernel 6.17.9-1-default. As part of converting properly to the OpenSUSE new open driver for CUDA, I manually removed all Nvidia and Cuda related packages that appear to be associated with the meta package cuda-cloud-opengpu, and I also removed any associated with the 580 driver. What I did is fully described in Getting The CUDA Toolkit Through ZYPper - #3 by mchnz. Then as noted in the referenced post I installed:
# zypper in nvidia-open-driver-G06-signed-cuda-kmp-default
# version=$(rpm -qa --queryformat '%{VERSION}\n' nvidia-open-driver-G06-signed-cuda-kmp-default | cut -d "_" -f1 | sort -u | tail -n 1)
# zypper install cuda-cloud-opengpu = ${version}
This afternoon I moved to kernel 6.18.0-1-default, rebooted, and sddm failed to start. The content of Xorg.0.log was:
[ 9.055] (II) LoadModule: "glx"
[ 9.105] (II) Loading /usr/lib64/xorg/modules/extensions/libglx.so
[ 9.122] (II) Module glx: vendor="X.Org Foundation"
[ 9.122] compiled for 1.21.1.21, module version = 1.0.0
[ 9.122] ABI class: X.Org Server Extension, version 10.0
[ 9.122] (II) LoadModule: "nvidia"
[ 9.122] (II) Loading /usr/lib64/xorg/modules/drivers/nvidia_drv.so
[ 9.135] (II) Module nvidia: vendor="NVIDIA Corporation"
[ 9.135] compiled for 1.6.99.901, module version = 1.0.0
[ 9.135] Module class: X.Org Video Driver
[ 9.139] (II) NVIDIA dlloader X Driver 580.105.08 Wed Oct 29 22:16:45 UTC 2025
[ 9.139] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 9.139] (II) Loading sub module "fb"
[ 9.139] (II) LoadModule: "fb"
[ 9.139] (II) Module "fb" already built-in
[ 9.139] (II) Loading sub module "wfb"
[ 9.139] (II) LoadModule: "wfb"
[ 9.139] (II) Loading /usr/lib64/xorg/modules/libwfb.so
[ 9.140] (II) Module wfb: vendor="X.Org Foundation"
[ 9.140] compiled for 1.21.1.21, module version = 1.0.0
[ 9.140] ABI class: X.Org ANSI C Emulation, version 0.4
[ 9.143] (EE) NVIDIA: Failed to initialize the NVIDIA kernel module. Please see the
[ 9.143] (EE) NVIDIA: system's kernel log for additional error messages and
[ 9.143] (EE) NVIDIA: consult the NVIDIA README for details.
Either I haven’t installed the driver and cuda-cloud-opengpu properly, or Tumbleweed 20251205 or 6.18.0-1-default has some kind of issue with the nvidia driver. I’ve booted back into 6.17.9-1-default, and all is well.