nvidia's gui no X-server

[zolex]

So, here i am with my (first world) problems....

I'm standing here on stable xfce 5.12 (+ task-mate-desktop) with my xmg a507 notebook and nvidia's properitary nvidia-driver:

fuzz@sparky:~$ uname -a
Linux sparky 4.19.0-9-amd64 #1 SMP Debian 4.19.118-2+deb10u1 (2020-06-07) x86_64 GNU/Linux

$ lspci -nnk | grep '\[03'
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 630 [8086:591b] (rev 04)
01:00.0 3D controller [0302]: NVIDIA Corporation GP107M [GeForce GTX 1050 Ti Mobile] [10de:1c8c] (rev a1)

$ nvidia-smi
Sat Aug  1 03:59:52 2020       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 418.113      Driver Version: 418.113      CUDA Version: N/A      |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|===============================+======================+======================|
|   0  GeForce GTX 105...  On   | 00000000:01:00.0 Off |                  N/A |
| N/A   48C    P8    N/A /  N/A |      1MiB /  4040MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID   Type   Process name                             Usage      |
|=============================================================================|
|  No running processes found                                                 |
+-----------------------------------------------------------------------------+

.....

so, my problem is that i can't start nvidia's GUI... /usr/bin/nvidia-settings   - i just get:

$ nvidia-settings

ERROR: Unable to load info from any available system

After blowing my mind and stressing my laptop for more than one day, i'm still not sure which GPU is actually in use because i get different statements and prime-select is not availible (only primerun&optirun).... Also i have no /etc/X11/xorg.conf ... after generating one with nvidia-xconfig lightdm broke down... so deleted xorg.conf and dpkg-reconfigure etc....
So i installed gdm3.... and gnome... and mate... that's not the problem...

What i guess is that bumblebee has no access to nvidia's modules....

$ cat /var/log/syslog | grep bumblebee
Aug  1 00:27:01 sparky bumblebeed[11603]: [  587.568257] [INFO]/usr/sbin/bumblebeed 3.2.1 started
Aug  1 00:27:01 sparky bumblebeed[11603]: [  587.585239] [ERROR]Failed to unload module 'nvidia_modeset' (ref count: 1).
Aug  1 00:27:01 sparky bumblebeed[11603]: [  587.585285] [ERROR]Failed to unload module 'nvidia' (ref count: 27).
Aug  1 00:28:54 sparky bumblebeed[11603]: [  700.531731] [WARN]Received Terminated signal.
Aug  1 00:28:54 sparky systemd[1]: bumblebeed.service: Succeeded.
Aug  1 00:28:54 sparky bumblebeed[32440]: [  700.543181] [INFO]/usr/sbin/bumblebeed 3.2.1 started
Aug  1 00:28:54 sparky bumblebeed[32440]: [  700.543396] [ERROR]Failed to unload module 'nvidia_modeset' (ref count: 1).
Aug  1 00:28:54 sparky bumblebeed[32440]: [  700.543417] [ERROR]Failed to unload module 'nvidia' (ref count: 27).
Aug  1 00:49:28 sparky bumblebeed[32440]: [ 1934.095241] [WARN]Received Terminated signal.

although I suspect the problem is with nvidia, I'd be happy if anybody has any ideas....   8)