Comment # 37 on bug 1174406 from Johannes Kehrer

Hello,
now I rebooted again without any updates. And after reboot I again can't access
USB passthrough. Seems I have to apply your script every time I have to access
USB... :-)

Anyway, here are the outputs from your commands:

the last line in /etc/group is:
users:x:100:johannes


johannes@JohannesOffice:~> ls -l /dev/bus/
insgesamt 0
drwxr-xr-x 8 root root 160 2020-07-30 20:59 usb
johannes@JohannesOffice:~> 
johannes@JohannesOffice:~> ls -l /dev/bus/usb/
insgesamt 0
drwxr-xr-x 2 root root 120 2020-07-30 20:59 001
drwxr-xr-x 2 root root  60 2020-07-30 20:59 002
drwxr-xr-x 2 root root 100 2020-07-30 20:59 003
drwxr-xr-x 2 root root 100 2020-07-30 20:59 004
drwxr-xr-x 2 root root  60 2020-07-30 20:59 005
drwxr-xr-x 2 root root  60 2020-07-30 20:59 006
johannes@JohannesOffice:~> tail -f /var/log/Xorg.0.log
[    14.429] (II) AMDGPU(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184
1344  768 771 777 806 -hsync -vsync (48.4 kHz e)
[    15.715] (II) AMDGPU(0): EDID vendor "ENC", prod id 5929
[    15.715] (II) AMDGPU(0): Using hsync ranges from config file
[    15.715] (II) AMDGPU(0): Using vrefresh ranges from config file
[    15.715] (II) AMDGPU(0): Printing DDC gathered Modelines:
[    15.715] (II) AMDGPU(0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440
1688  1024 1025 1028 1066 +hsync +vsync (64.0 kHz eP)
[    15.715] (II) AMDGPU(0): Modeline "800x600"x0.0   40.00  800 840 968 1056 
600 601 605 628 +hsync +vsync (37.9 kHz e)
[    15.715] (II) AMDGPU(0): Modeline "640x480"x0.0   25.18  640 656 752 800 
480 490 492 525 -hsync -vsync (31.5 kHz e)
[    15.715] (II) AMDGPU(0): Modeline "720x400"x0.0   28.32  720 738 846 900 
400 412 414 449 -hsync +vsync (31.5 kHz e)
[    15.715] (II) AMDGPU(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184
1344  768 771 777 806 -hsync -vsync (48.4 kHz e)
^C