How did you do that @juergh? Similar setup? In the meantime i have tried to narrow the bug down further:
* I have replaced the raspberry pi * Ensured that i use grounded power supplied for the hubs * Tested with raspi-os & old "known good" kernel 4.19 I experienced the problem with all of these. The error messages differ but the end result of all USB devices disconnecting was the same (btw this includes a USB stick that is NOT connected to a hub). So i think this is not an ubuntu specific problem. This problem does not occur if i use the USB2 ports. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1930629 Title: Raspberry pi 4 USB controller randomly crashes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1930629/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
