When I boot to use an older kernel, initially things appear no better --
no monitors except the laptop and after logging into Kubuntu no monitors
at all.

After removing the USB-C connection and plugging it back in again both
monitors come back, headphones work but the wired network connection
does not work.

Here's some dmesg output for this:

mulhollandd@mulhollandd-XPS-13-9360:~$ sudo dmesg --level=err
[   95.459529] xhci_hcd 0000:39:00.0: xHCI host controller not responding, 
assume dead
[   95.459573] xhci_hcd 0000:39:00.0: HC died; cleaning up
[  100.553294] pcieport 0000:00:1c.0: AER: PCIe Bus Error: severity=Corrected, 
type=Physical Layer, (Receiver ID)
[  100.553301] pcieport 0000:00:1c.0: AER:   device [8086:9d10] error 
status/mask=00000001/00002000
[  100.553306] pcieport 0000:00:1c.0: AER:    [ 0] RxErr                 
[  100.630562] pcieport 0000:02:00.0: can't change power state from D3cold to 
D0 (config space inaccessible)
mulhollandd@mulhollandd-XPS-13-9360:~$ # no monitors but when I unplug and 
replug both monitors come back
mulhollandd@mulhollandd-XPS-13-9360:~$ # now a new dmesg output
mulhollandd@mulhollandd-XPS-13-9360:~$ sudo dmesg --level=err
[   95.459529] xhci_hcd 0000:39:00.0: xHCI host controller not responding, 
assume dead
[   95.459573] xhci_hcd 0000:39:00.0: HC died; cleaning up
[  100.553294] pcieport 0000:00:1c.0: AER: PCIe Bus Error: severity=Corrected, 
type=Physical Layer, (Receiver ID)
[  100.553301] pcieport 0000:00:1c.0: AER:   device [8086:9d10] error 
status/mask=00000001/00002000
[  100.553306] pcieport 0000:00:1c.0: AER:    [ 0] RxErr                 
[  100.630562] pcieport 0000:02:00.0: can't change power state from D3cold to 
D0 (config space inaccessible)
[  158.228726] pcieport 0000:00:1c.4: AER: PCIe Bus Error: severity=Corrected, 
type=Data Link Layer, (Transmitter ID)
[  158.228734] pcieport 0000:00:1c.4: AER:   device [8086:9d14] error 
status/mask=00001000/00002000
[  158.228739] pcieport 0000:00:1c.4: AER:    [12] Timeout               
mulhollandd@mulhollandd-XPS-13-9360:~$ # we are on an older kernel now
mulhollandd@mulhollandd-XPS-13-9360:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 21.04
Release:        21.04
Codename:       hirsute
mulhollandd@mulhollandd-XPS-13-9360:~$ uname -a
Linux mulhollandd-XPS-13-9360 5.8.0-50-generic #56-Ubuntu SMP Mon Apr 12 
17:18:36 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
mulhollandd@mulhollandd-XPS-13-9360:~$ 

I should note that the AER PCIe Bus Errors have been present I think for
many years and versions of Ubuntu so I think they are unrelated. However
the power state transition from "D3cold to D0 (config space
inaccessible)" is I think new.

Happy to provide further information.

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Title:
  WD19 dock stops working in Ubuntu 21.04

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