Re: usb usb1-port10: disabled by hub (EMI?), re-enabling...

From: Paul Menzel <pmenzel@molgen.mpg.de>
To: Mario Limonciello <Mario.Limonciello@dell.com>
Cc: Mathias Nyman <mathias.nyman@intel.com>,
	USB list <linux-usb@vger.kernel.org>,
	Greg KH <gregkh@linuxfoundation.org>
Subject: Re: usb usb1-port10: disabled by hub (EMI?), re-enabling...
Date: Sat, 12 Dec 2020 12:01:17 +0100	[thread overview]
Message-ID: <c441ebc6-1c31-919d-784c-1ae704ef7ffe@molgen.mpg.de> (raw)
In-Reply-To: <DM6PR19MB2636B65562B4A768A9629E94FACD0@DM6PR19MB2636.namprd19.prod.outlook.com>

Dear Mario, dear Greg,

Am 08.12.20 um 19:16 schrieb Limonciello, Mario:
>>>> 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?

Asking the user, and checking the device, no Bluetooth device is listed 
by GNOME.

> 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?

Good point. I removed it, and the behavior was the same.

> 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.

Good idea. I did that, and disabling the BT device in the firmware 
(which took several seconds), the error was gone.

>> 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.

Thank you for your help. The device seems broken, but I’ll try to find 
some live system to rule out a problem with Debian.

Kind regards,

Paul