Re: USB-C dock ethernet port issue

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with extract from dmesg :

usb 4-2-port3: Cannot enable. Maybe the USB cable is bad?
usb 4-2-port3: Cannot enable. Maybe the USB cable is bad?
usb 1-8.3: new high-speed USB device number 26 using xhci_hcd
usb 4-2-port3: Cannot enable. Maybe the USB cable is bad?
usb 4-2-port3: Cannot enable. Maybe the USB cable is bad?
usb 1-8.3: new high-speed USB device number 27 using xhci_hcd
usb 1-8.3: Device not responding to setup address.
usb 1-8.3: Device not responding to setup address.
usb 1-8.3: device not accepting address 27, error -71

-- 
BBVA

Marc Fauvain

Head of Equity Trading Americas - Managing Director

Tel. +52 55 5621 9831  Cel. +52 1 55 3755 0028

Corporate & Investment Banking - México D.F.



-----Original Message-----
From: Marc Fauvain <marc.fauvain@xxxxxxxx>
To: linux-usb@xxxxxxxxxxxxxxx
Subject: USB-C dock ethernet port issue
Date: Tue, 15 Oct 2019 17:35:14 -0500

Not specific to a kernel version as I've been seeing the bug since
kernel 4.8. When connecting a macbookpro 14,1 to a USB dock (from
Pluggable) with Ethernet, USB and Audio via provided (Pluggable) USB-C
cable, Ethernet port is not always recognized with provided dmesg.

Strange because when connecting to the dock with an Apple USB-C cable,
ethernet port is always recognized, however with a different  name
`enp0s20f0u8u3`. With Pluggable USB-C cable I tried to power cycle the
dock and `sudo lsusb -c` to no avail. Ethernet port was not recognized
anymore.
I recently upgraded to kernel 5.2.14, turned off/on the dock, and ran
`sudo lsusb -v`, Ethernet port magically appeared (with Pluggable USB-
C 
cable) however with `enp0s20f0u8u3` name and not `enp7s0u2u3` as
before. There seem to have some instability when setting USB connection
at some point.

Back after a few weeks, just after power failure, ethernet port is not
recognized anymore. running kernel 5.3.5 now. sudo lsusb -v now does
not do any magic. ethernet port stay unrecognized and dmesg shows 'usb
4-2-port3: Cannot enable. Maybe the USB cable is bad?'..

Regards





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