I have the same problem discussed here: "Invalid MIT-MAGIC-COOKIE-1 key" message while running a program with the Terminal
I already tried the solutions reported there Any suggestion is welcome
hostnamectl status
Static hostname: VivoBook
Icon name: computer-laptop
Chassis: laptop
Machine ID: a8080c018741443d97105241722bc82d
Boot ID: f397f248ea584fe2907e01ef63d4b6f2
Operating System: Ubuntu 20.04 LTS
Kernel: Linux 5.4.0-33-generic
Architecture: x86-64
xauth list
VivoBook/unix: MIT-MAGIC-COOKIE-1 134556a706e919cf2768b373cbf77da0
#ffff#5669766f426f6f6b#: MIT-MAGIC-COOKIE-1 134556a706e919cf2768b373cbf77da0
echo $DISPLAY
:1
nvidia-smi
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 440.64 Driver Version: 440.64 CUDA Version: 10.2 |
|-------------------------------+----------------------+----------------------+
| 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 1050 Off | 00000000:01:00.0 Off | N/A |
| N/A 48C P0 N/A / N/A | 561MiB / 4042MiB | 2% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 2413 G /usr/lib/xorg/Xorg 79MiB |
| 0 3118 G /usr/lib/xorg/Xorg 249MiB |
| 0 3388 G /usr/bin/gnome-shell 204MiB |
| 0 3877 G ...uest-channel-token=14869638892127264724 13MiB |
| 0 5803 G /usr/lib/firefox/firefox 1MiB |
| 0 5810 G /usr/lib/firefox/firefox 1MiB |
| 0 5853 G /usr/lib/firefox/firefox 1MiB |
+-----------------------------------------------------------------------------+
