Public bug reported: My raspberry pi 4 running Ubuntu 20.04 server is constantly having trouble the the usb controller. I have 2 externally powered USB hubs connected that have a few HDDs plugged in.
After a seemingly random amount of time (between 1 minute and 2 days) the usb controller will crash completely. No USB devices are detected anymore after that, i have to reboot the system. I have tried: * Providing a lot of cooling (metal case + desktop size fan) * Switching the USB Hubs to a different brand * Switching the power supply of the USB hubs * Switching the power supply of the raspberry Nothing helped, so i concluded that this probably is a kernel bug. I think the USB controller should not crash at the very least. I've attached my dmesg. lsb_release -rd Description: Ubuntu 20.04.2 LTS Release: 20.04 linux-raspi version: 5.4.0.1035.70 uname -a Linux pi 5.4.0-1035-raspi #38-Ubuntu SMP PREEMPT Tue Apr 20 21:37:03 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux lsusb (after crash) Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub ** Affects: linux-raspi (Ubuntu) Importance: Undecided Status: New ** Attachment added: "dmesg output" https://bugs.launchpad.net/bugs/1930629/+attachment/5501970/+files/pi.dmesg.log -- 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