> >> On a Dell Precision 3540/0M14W7, BIOS 1.9.1 07/06/2020 > >> > >> $ lspci -nn | grep -i usb > >> 00:14.0 USB controller [0c03]: Intel Corporation Cannon Point-LP USB > 3.1 > >> xHCI Controller [8086:9ded] (rev 30) > >> 3a:00.0 USB controller [0c03]: Intel Corporation JHL6340 Thunderbolt 3 > >> USB 3.1 Controller (C step) [Alpine Ridge 2C 2016] [8086:15db] (rev 02) > >> > >> at each boot Linux 5.6 to 5.9 logs the error below. > >> > >> [ 95.528190] usb usb1-port10: disabled by hub (EMI?), re-enabling... > >> > >> Everything seems to be fine, so I wonder, why this is level error. Is it a > >> hardware error? > > > > Yes, it is a hardware issue. > To me from your logs it looks like it's Intel BT device with this problem. https://linux-hardware.org/index.php?id=usb:8087-0aaa Does BT actually work after bootup completes? BTW I notice that you are setting auto-suspend on your kernel command line. Presumably that's not the default for this module. Is this possibly causing the behavior? Also I notice that you have an error loading firmware for the device. You might check that you have the latest firmware from linux-firmware. If you do - maybe it's related to the HW error? [ 105.743441] Bluetooth: hci0: Failed to send firmware data (-110) [ 105.743558] Bluetooth: hci0: sending frame failed (-19) [ 105.743633] Bluetooth: hci0: Intel reset sent to retry FW download And lastly if you want to confirm it's actually BT causing the problem, I believe you should be able to turn off BT in UEFI firmware setup. > Thank you for the confirmation. Mario, do you know if this issues is > known to the Dell hardware team? > I'm sorry, I don't know. You would need to work with the support team on a case. My own opinion: I would suspect you'll have a better result if there is a functional issue to show.
