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
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https://bugs.launchpad.net/bugs/1930629
Title:
Raspberry pi 4 USB controller randomly crashes
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