Getting Vcube to run on Nvidia dGPU on a workstation with additional Intel iGPU

So I have reinstalled Slowroll, but have not succeede to get Nvidia drivers loaded.
To sum up, I replaced kernel-default with kernel-longterm which booted as

uname -r
6.12.63-1.0.4.sr20251204-longterm
zypper install-new-recommends
The following 15 NEW packages are going to be installed:
  kernel-longterm-6.12.41-1.0.4.1.sr20250801 libnvidia-egl-gbm1 libnvidia-egl-wayland1 libnvidia-egl-x111 libnvidia-gpucomp nvidia-common-G06 nvidia-compute-G06
  nvidia-compute-utils-G06 nvidia-gl-G06 nvidia-modprobe nvidia-open-driver-G06-signed-kmp-longterm nvidia-persistenced nvidia-userspace-meta-G06
  nvidia-video-G06 ovpn-dco-kmp-longterm

Rebooted and neither kernel-longterm-6.12.41-1.0.4.1.sr20250801 was available nor Nvidia drivers loaded, still 6.12.63-1.0.4.sr20251204-longterm booted.

It looked for me like the Nvidia installation depended on kernel-longterm-6.12.41-1.0.4.1.sr20250801, so I found this old kernel and installed it and set it as default boot with YasT bootloader, locked it and added it in zypp.conf
But Nvidia still not loaded, and I deleted and reinstalled it with zypper install-new-recommends (now the kernel version was not listed).

According to the SDB:NVIDIA and an older forum post
SDB says nouveau is blacklisted when Nvidia drivers installed. Not for me.
it is somewhat unclear if Nouveau should be automatic blacklisted by the Nvidia installation, possibly it is not, and I have not found how to ensure and do it.

uname -r
6.12.41-1.0.4.sr20250801-longterm


lsmod | grep nvidia


inxi -Ga
Graphics:
  Device-1: Intel HD Graphics 530 vendor: Micro-Star MSI driver: i915
    v: kernel arch: Gen-9 process: Intel 14n built: 2015-16 ports:
    active: HDMI-A-2 empty: DP-1, DP-2, HDMI-A-1, HDMI-A-3 bus-ID: 00:02.0
    chip-ID: 8086:1912 class-ID: 0300
  Device-2: NVIDIA GM206 [GeForce GTX 960] vendor: Micro-Star MSI
    driver: N/A alternate: nouveau non-free: 550-580.xx+ status: current (as of
    2025-11; EOL~2026-12-xx) arch: Maxwell code: GMxxx process: TSMC 28nm
    built: 2014-2019 pcie: gen: 3 speed: 8 GT/s lanes: 16 bus-ID: 01:00.0
    chip-ID: 10de:1401 class-ID: 0300


zypper se -is kernel-longterm
Loading repository data...
Reading installed packages...

S  | Name            | Type    | Version                    | Arch   | Repository
---+-----------------+---------+----------------------------+--------+----------------------
i+ | kernel-longterm | package | 6.12.63-1.1                | x86_64 | update-slowroll
i+ | kernel-longterm | package | 6.12.47-1.0.6.1.sr20250901 | x86_64 | update-slowroll
i+ | kernel-longterm | package | 6.12.41-1.0.4.1.sr20250801 | x86_64 | update-slowroll
i+ | kernel-longterm | package | 6.12.63-1.1                | x86_64 | Main Repository (OSS)
i+ | kernel-longterm | package | 6.12.63-1.1                | x86_64 | repo-oss


zypper se -is nvidia
Loading repository data...
Reading installed packages...

S  | Name                                       | Type    | Version                  | Arch   | Repository
---+--------------------------------------------+---------+--------------------------+--------+----------------------
i  | kernel-firmware-nvidia                     | package | 20251018-1.1             | noarch | Main Repository (OSS)
i  | kernel-firmware-nvidia                     | package | 20251018-1.1             | noarch | repo-oss
i  | libnvidia-egl-gbm1                         | package | 1.1.2.1-8.1              | x86_64 | repo-non-free
i  | libnvidia-egl-wayland1                     | package | 1.1.21-1.1               | x86_64 | update-slowroll
i  | libnvidia-egl-wayland1                     | package | 1.1.21-1.1               | x86_64 | Main Repository (OSS)
i  | libnvidia-egl-wayland1                     | package | 1.1.21-1.1               | x86_64 | repo-oss
i  | libnvidia-egl-x111                         | package | 1.0.5-22.1               | x86_64 | repo-non-free
i  | libnvidia-gpucomp                          | package | 580.82.07-39.1           | x86_64 | repo-non-free
i  | nvidia-common-G06                          | package | 580.82.07-39.1           | x86_64 | repo-non-free
i  | nvidia-compute-G06                         | package | 580.82.07-39.1           | x86_64 | repo-non-free
i  | nvidia-compute-utils-G06                   | package | 580.82.07-39.1           | x86_64 | repo-non-free
i  | nvidia-gl-G06                              | package | 580.82.07-39.1           | x86_64 | repo-non-free
i  | nvidia-modprobe                            | package | 580.126.09-22.1          | x86_64 | repo-non-free
i  | nvidia-open-driver-G06-signed-kmp-longterm | package | 580.82.07_k6.12.46_1-1.2 | x86_64 | update-slowroll
i  | nvidia-persistenced                        | package | 580.126.09-2.1           | x86_64 | repo-non-free
i  | nvidia-userspace-meta-G06                  | package | 580.82.07-12.1           | noarch | repo-non-free
i  | nvidia-userspace-meta-G06                  | package | 580.82.07-12.1           | noarch | repo-non-free
i  | nvidia-video-G06                           | package | 580.82.07-39.1           | x86_64 | repo-non-free
i  | openSUSE-repos-Slowroll-NVIDIA             | package | 20250728.9adc675-1.1     | x86_64 | Main Repository (OSS)
i  | openSUSE-repos-Slowroll-NVIDIA             | package | 20250728.9adc675-1.1     | x86_64 | repo-oss