Dell D6000 dock resetting on Ubuntu 16.04

[mbokulic]

Hi,

Every 1-2 hours (in random intervals, sometimes shorter) my two monitors stop getting a signal. If I unplug the dock they start working again. The keyboard and mouse still work though.

Hardware: Latitude 7280, D6000 dock, Dell monitors

Software: Ubuntu 16.04 (i3 window manager)

Initially the monitors didn't work at all, but started after I installed different graphics drivers (these ones)

dmesg outputs these messages:

Disable of device-initiated U1 failed
Disable of device-initiated U2 failed

and then

Set SEL for device-initiated U1 failed
Set SEL for device-initiated U2 failed

[Szymon]

Hi mbokulic,

Could you please gather logs and attach a zip file to this thread?
To capture these, please follow the instructions from this article:
http://support.displaylink.com/knowl...to-displaylink

Thanks,
Szymon

[Darren]

Hi Szymon,

Fedora 26, same displaylink device, exhibits same behaviour. Log attached.

[k001]

Originally Posted by Szymon

Hi mbokulic,

Could you please gather logs and attach a zip file to this thread?

I have the same dock (Dell D6000) and the same symptoms (every 1h to every 10m everything goes down, including ext. displays). Logs are attached.

Update: DisplayLinkManager crashes that are inside the report are not related to this case (but would be worth investigating nevertheless).

[Wunsz]

Dell XPS 15 9560 + Dell D6000 @ Ubuntu 17.10 Beta 2 (Gnome @ Xorg)

Random dock disconnect (everything). Re-connecting fixes the issue. Attaching log after 2 disconnects.

EDIT: My bad, only display goes black.

[zombielinux]

Same issue here. Dell D6000 Dock, 130W adapter, and Latitude 7480

[k001]

I found a way to bring a display back to life if it's off but available from xrandr output. You need to say something like

xrandr --output DVI-I-2-2 --auto

It works, but unfortunately I have to rearrange displays after that. Something like

xrandr --output DVI-I-2-2 --right-of eDP1
xrandr --output DVI-I-1-1 --right-of DVI-I-2-2

[zombielinux]

If you use arandr, you can save the monitor config. It saves as a .sh so you just get to re-execute that script and it will re-arrange your monitors.

Handy for having multiple configurations that you use and scripting between them with udev.

[k001]

Originally Posted by zombielinux

If you use arandr, you can save the monitor config. It saves as a .sh so you just get to re-execute that script and it will re-arrange your monitors.

Handy for having multiple configurations that you use and scripting between them with udev.

In my case, gnome is supposed to take care of it. Unfortunately, display device names (IDs) are changing sometimes after a reboot (or replug), so it fails to do its job and I have to use xrandr. And yes, I ended up saving this to a script (need to think about how to handle changing IDs).

[k001]

My earlier advise about using xrandr is not working for me either I now have monitors shown as on in xrandr, but they are in fact in power saving mode. All this happens once in a while, when a message appears in kernel logs:

[18125.523348] usb 4-1.1: Disable of device-initiated U1 failed.
[18125.530395] usb 4-1.1: Disable of device-initiated U2 failed.
[18125.530508] cdc_ncm 4-1.1:1.5 enx9cebe8554690: unregister 'cdc_ncm' usb-0000:39:00.0-1.1, CDC NCM
[18125.582824] usb 4-1.1: Set SEL for device-initiated U1 failed.
[18125.589806] usb 4-1.1: Set SEL for device-initiated U2 failed.

This seems like a device wants to sleep, and the kernel can't prevent it and is losing it. Nevertheless, in a moment it brings itself back to life, with everything connected though it working -- except, alas, for the monitors.