Second screen not waking up at all with nvidia GeForce RTX 4060 Ti

OK, I have now tried to use the other kernel (6.6… lts) with the latest updates from 2024-07-24 and logged into the session with wayland and X11, the behaviour is identical, black screen after I activate second screen.
also when I call garuda-inxi from tty it turns to that black tty

I have followed following threads:

here I have tried updating the Mirror lists with reflector, done startx from tty and pasted the output, done the startplasma-X11 and startplasma-wayland

I tried this: Display Manager multi-monitor configuration but there I do not even get the second monitor displayed with xrandr (as long as I have Plasma running, just now it just lists DP-3 as connected) as soon as I turn on second monitor I lose the Plasma desktop and have to login with tty and there is no xrandr (Can’t open display)

I have now read [545.29.06-18.1]Flip event timeout error on startup, shutdown and sometimes suspend. Wayland unusable - #18 by shelter - Linux - NVIDIA Developer Forums

Now there is a hint at NVidia 555 Display Issues with Dual Monitor on Gnome / Kernel & Hardware / Arch Linux Forums however, downgrading to the 550 series nvidia drivers did not work as described in the post. This seems to be different in garudalinux vs archlinux

sudo pacman -Rns nvidia nvidia-utils nvidia-settings
Fehler: Ziel nicht gefunden: nvidia

pacman -Qs 'kernel|nvidia'
local/b43-fwcutter 019-5
firmware extractor for the b43 kernel module
local/dkms 3.0.12-1
Dynamic Kernel Modules System
local/egl-wayland 3:1.1.13-1
EGLStream-based Wayland external platform
local/embree 4.3.3-1
Collection of high-performance ray tracing kernels
local/exfatprogs 1.2.4-1
exFAT filesystem userspace utilities for the Linux Kernel exfat driver
local/fuse2 2.9.9-5
Interface for userspace programs to export a filesystem to the Linux kernel
local/fuse3 3.16.2-1
Interface for userspace programs to export a filesystem to the Linux kernel
local/garuda-nvidia-config 2:1.1.6-1
Meta configuration package for nvidia systems on Garuda Linux
local/gwe 0.15.9-1
A system utility for controlling NVIDIA GPUs
local/iptables-nft 1:1.8.10-2
Linux kernel packet control tool (using nft interface)
local/kernel-modules-hook 0.1.7-3
Keeps your system fully functional after a kernel upgrade
local/kmod 32-1
Linux kernel module management tools and library
local/lib32-libdrm 2.4.122-1
Userspace interface to kernel DRM services (32-bit)
local/lib32-nvidia-utils 555.58.02-1
NVIDIA drivers utilities (32-bit)
local/lib32-opencl-nvidia 555.58.02-1
OpenCL implemention for NVIDIA (32-bit)
local/libdrm 2.4.122-1
Userspace interface to kernel DRM services
local/libnetfilter_conntrack 1.0.9-2
Library providing an API to the in-kernel connection tracking state table
local/libnfnetlink 1.0.2-2
Low-level library for netfilter related kernel/userspace communication
local/libsysprof-capture 46.0-4
Kernel based performance profiler - capture library
local/libvdpau 1.5-3
Nvidia VDPAU library
local/libxnvctrl 555.58.02-1
NVIDIA NV-CONTROL X extension
local/linux-api-headers 6.10-1
Kernel headers sanitized for use in userspace
local/linux-lts 6.6.42-1
The LTS Linux kernel and modules
local/linux-lts-headers 6.6.42-1
Headers and scripts for building modules for the LTS Linux kernel
local/linux-zen 6.10.2.zen1-1
The Linux ZEN kernel and modules
local/linux-zen-headers 6.10.2.zen1-1
Headers and scripts for building modules for the Linux ZEN kernel
local/mhwd-nvidia 555.58.02.1-1
NVIDIA pci id list for MHWD
local/mhwd-nvidia-390xx 390.143-1
mhwd-nvidia-390xx PCI ID database
local/mhwd-nvidia-470xx 470.94-1
mhwd-nvidia-470xx PCI ID database
local/mtdev 1.1.7-1
A stand-alone library which transforms all variants of kernel MT events to the slotted type B protocol
local/nvidia-dkms 555.58.02-1
NVIDIA drivers - module sources
local/nvidia-settings 555.58.02-1
Tool for configuring the NVIDIA graphics driver
local/nvidia-utils 555.58.02-1
NVIDIA drivers utilities
local/opencl-nvidia 555.58.02-1
OpenCL implemention for NVIDIA
local/quota-tools 1:4.09-2
Tools to manage kernel-level quotas in Linux
local/texlive-latex 2024.2-2 (texlive)
TeX Live - LaTeX fundamental packages

tried:

pacman -Syu nvidia
nvidia-555.58.02-10 and nvidia-dkms-555.58.02-1 are in conflict (NVIDIA-MODULE). Remove nvidia-dkms? [j/N]

of course, I didn’t do it, but I am surprised that nvidia is 02-10 and nvidia-dkms is 02-1

also the downgrade did not work. due to dependencies.