Discussion:
No audio and network freeze running Linux (ubuntu, Fedora) on an XPS 15 7590 w/ WD19TB
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Chris de Bruin
2020-11-17 14:10:38 UTC
Permalink
Hi all,

I am currently running Ubuntu 20.04 on my XPS 15 7590. Here everything
works like a charm. When working at my desk I connect my monitor and
peripherals using my WD19TB docking station connected over Thunderbolt.
Here I run into two (small) problems.

1) I have no audio from both the speaker connection and the headphones
connection. Both are recognized by the OS, but there is no audio. I have
been playing around with ALSA, but without any success.

Now using bluetooth audio, but I would really like to use a wired audio
connection when connected to the docking station.

2) When the docking station is connected to an ethernet cable all works
as expected until I shut down the computer. A few minutes after I shut
down the computer my home network completely appears to freeze / hang
up, every device on the network loses its connection. Disconnecting the
ethernet cable from the docking station or (re)starting the laptop
solves this problem. I notice the left led on the ethernet port (link)
of the docking station stays on after the computer shuts down (when
running Windows 10 it does not). When using a USB ethernet adapter
directly connected to the laptop (being disconnected from the docking
station at that time) the problem does not occur.

Now connecting to my network using wifi, but here too - I would really
like to use a wired connection when connected to the docking station.

I have experienced both problems with Ubuntu 20.04 - also with Ubuntu
18.04 and several Fedora versions. When installing and running Windows
10 everything works as expected.

Has anyone else experienced these problems and maybe solved them? Or
does anyone have an idea that might solve these problems?

Thanks in advance.
--
Chris de Bruin
Paul
2020-11-17 17:09:37 UTC
Permalink
Post by Chris de Bruin
Hi all,
I am currently running Ubuntu 20.04 on my XPS 15 7590. Here everything
works like a charm. When working at my desk I connect my monitor and
peripherals using my WD19TB docking station connected over Thunderbolt.
Here I run into two (small) problems.
1) I have no audio from both the speaker connection and the headphones
connection. Both are recognized by the OS, but there is no audio. I have
been playing around with ALSA, but without any success.
Now using bluetooth audio, but I would really like to use a wired audio
connection when connected to the docking station.
2) When the docking station is connected to an ethernet cable all works
as expected until I shut down the computer. A few minutes after I shut
down the computer my home network completely appears to freeze / hang
up, every device on the network loses its connection. Disconnecting the
ethernet cable from the docking station or (re)starting the laptop
solves this problem. I notice the left led on the ethernet port (link)
of the docking station stays on after the computer shuts down (when
running Windows 10 it does not). When using a USB ethernet adapter
directly connected to the laptop (being disconnected from the docking
station at that time) the problem does not occur.
Now connecting to my network using wifi, but here too - I would really
like to use a wired connection when connected to the docking station.
I have experienced both problems with Ubuntu 20.04 - also with Ubuntu
18.04 and several Fedora versions. When installing and running Windows
10 everything works as expected.
Has anyone else experienced these problems and maybe solved them? Or
does anyone have an idea that might solve these problems?
Thanks in advance.
"Enabling Docking Station Support for the Linux Kernel
Is Harder Than You Would Think"

https://www.kernel.org/doc/ols/2006/ols2006v1-pages-9-18.pdf

"peripheral devices on Dell WD19TB cannot be detected after suspend resume"

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1859407

The dock seems to use firmware.

https://bugzilla.redhat.com/show_bug.cgi?id=1751091

Bios:
# fwupdmgr get-updates
No upgrades for Thunderbolt controller in Dell dock, current is 40.00: 40.00=same
No upgrades for RTS5487 in Dell dock, current is 01.47: 01.47=same
No upgrades for WD19TB, current is 01.00.00.00: 01.00.00.00=same
No upgrades for Package level of Dell dock, current is 01.00.04.01: 01.00.04.01=same
No upgrades for VMM5331 in Dell dock, current is 05.03.10: 05.03.10=same
No upgrades for RTS5413 in Dell dock, current is 01.21: 01.21=same
No upgrades for Precision 5530 System Firmware, current is 0.1.12.0: 0.1.11.2=older, 0.1.10.1=older, 0.1.8.1=older, 0.1.7.0=older, 0.1.6.0=older

I was hoping to find evidence of an undock() command of
some sort, to properly dump the hardware in the dock and
cause it to shut down cleanly, but I'm not seeing evidence
of that.

Paul

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