GPU driver broken after enabling secure boot

Hm, doesn't work...

Sun Jan 25 19:15:53 2026       
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 580.126.09             Driver Version: 580.126.09     CUDA Version: 13.0     |
+-----------------------------------------+------------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id          Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |           Memory-Usage | GPU-Util  Compute M. |
|                                         |                        |               MIG M. |
|=========================================+========================+======================|
|   0  NVIDIA GeForce RTX 4080 ...    Off |   00000000:01:00.0  On |                  N/A |
| 44%   59C    P0            261W /  320W |   10110MiB /  16376MiB |     85%      Default |
|                                         |                        |                  N/A |
+-----------------------------------------+------------------------+----------------------+

+-----------------------------------------------------------------------------------------+
| Processes:                                                                              |
|  GPU   GI   CI              PID   Type   Process name                        GPU Memory |
|        ID   ID                                                               Usage      |
|=========================================================================================|
|    0   N/A  N/A            1858      G   /usr/lib/xorg/Xorg                      258MiB |
|    0   N/A  N/A            2027      G   /usr/bin/gnome-shell                    111MiB |
|    0   N/A  N/A            2701      G   /opt/Mullvad VPN/mullvad-gui             26MiB |
|    0   N/A  N/A            4803      G   ...share/Steam/ubuntu12_32/steam          4MiB |
|    0   N/A  N/A            4993      G   ./steamwebhelper                          5MiB |
|    0   N/A  N/A            5023    C+G   ...am/ubuntu12_64/steamwebhelper          9MiB |
|    0   N/A  N/A            5155      G   /usr/bin/nextcloud                        3MiB |
|    0   N/A  N/A            5176      G   firefox                                 152MiB |
|    0   N/A  N/A           20268    C+G   ...077\bin\x64\Cyberpunk2077.exe       9356MiB |
+-----------------------------------------------------------------------------------------+

Can anyone help me, why its still not working?
@Aravisian @Forpli?

Help is much appreciated! Thanks!

What is your terminal output for:

glxinfo | grep -i "OpenGL renderer"

and

glxinfo | grep -i "OpenGL version"