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Old 04-13-2021, 08:33 PM   #1
MT223
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Default DisplayLink 5.4 and Linux Kernel 5.11 not working

Greetings, I'm new to the forum and am currently experiencing an issue. I'm a novice linux user and installed linux on my primary laptop to force myself to learn. :-) Any and all assistance is greatly appreciated.

Background on my environment:
- Plugable UD-3900
- DisplayLink Link 5.4 installed
- Linux: Pop_OS! 20.04 (Based upon Ubuntu 20.04) & latest updates
- Linux Kernel: 5.11.0-7612-generic
- Xorg Version: xorg-server 2:1.20.9-2ubuntu1.2~20.04.2

When I was on Linux Kernel 5.8, my dual displays presented from my Plugable universal docking station worked and allowed me to extend the desktop from the primary display on my laptop. I was hoping to not have to boot into a downgraded linux kernel! :-)

However, since upgrading the kernerl to 5.11, the displays aren't working fom my docking station. If I connect the HDMI cable from one of the displays directly to the HDMI port on my laptop, the functionality works as expected. Is there some tool or configuration that I can use to help resolve this? According to the latest release, DisplayLink 5.4 is supposed to work on the 5.11 kernel. The Plugable website points me to use the displaylink drivers posted on the displaylink or synaptics website.

This is the behavior that is exhibited when connected to the docking station:
- When I run "lsusb -d 17e9:", it sees the device as "Bus 002 Device 003: ID 17e9:4323 DisplayLink USB3.0 Hub"
- When I go to settings -> displays, I can see the display from the drop down (deactivated). When I go to activate, it shows up temporarily. When I select apply and keep changes, it goes back to deactivated.

Last edited by MT223; 04-14-2021 at 10:19 PM. Reason: Providing clarity and details
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Old 04-14-2021, 03:23 PM   #2
dmiller
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My environment:
- Kensington SD4900P USB-C
- DisplayLink Link Driver 5.4
- Linux: Pop_OS! 20.04 (Based upon Ubuntu 20.04) -- Fully updated
- Linux Kernel 5.11.0-7612-generic

When I try to boot I get a sig 11 from Xorg. In order to get a desktop environment I have to do one of the following:

1) Disable my NVIDIA card completely and use integrated Intel card
2) Uninstall DisplayLink Driver 5.4

With either of the above "fixes" applied, I can at least boot into Xorg. I cannot use my external displays.

Any one have alternatives or workarounds? I'd really rather not swap distros, but missing my external monitors does take a hit to my productivity.
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Old 04-14-2021, 03:41 PM   #3
dmiller
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One additional note.

The sticky topic for Ubuntu 20.04 users (since Pop!_OS 20.04 is a derivative) suggests installing a 'fix' for xserver-xorg-core. This is marked as a fix for xserver-xorg-core (2:1.20.8-2ubuntu2).

I currently have xserver-xorg-core (2:1.20.9-2ubuntu1.2~20.04.2) installed and did not downgrade.
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Old 04-14-2021, 10:30 PM   #4
MT223
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Quote:
Originally Posted by dmiller View Post
One additional note.

The sticky topic for Ubuntu 20.04 users (since Pop!_OS 20.04 is a derivative) suggests installing a 'fix' for xserver-xorg-core. This is marked as a fix for xserver-xorg-core (2:1.20.8-2ubuntu2).

I currently have xserver-xorg-core (2:1.20.9-2ubuntu1.2~20.04.2) installed and did not downgrade.
Thanks, dmiller.

Colleages, FYI, I tried The sticky topic for Ubuntu 20.04 users and downgraded my Xorg version to xorg-server 2:1.20.8-2ubuntu2. Upon downgrading my Xorg, i rebooted the system. It still does not work. Regards.
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Old 04-16-2021, 08:18 PM   #5
dmiller
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MT223,

Just wanted to follow-up for you. I've fixed my issue by removing the DisplayLink drivers completely from my system.

I have a DisplayPort 1.4/Intel 11th Gen/GTX 1650 Ti in my laptop. The Kensington SD4900P is a DisplayPort 1.3 device.

I've updated to use a Cable Matters DisplayPort 1.4 hub with MST and DSC support. This has allowed me to remove the DisplayLink drivers and have it 'just work' for 2 external 2560x1440 monitors.

Model number for reference is 201331-BLK.

https://www.cablematters.com/pc-1295...ayport-pd.aspx

Good luck!
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Old 04-19-2021, 12:24 AM   #6
MT223
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Quote:
Originally Posted by dmiller View Post
MT223,

Just wanted to follow-up for you. I've fixed my issue by removing the DisplayLink drivers completely from my system.

I have a DisplayPort 1.4/Intel 11th Gen/GTX 1650 Ti in my laptop. The Kensington SD4900P is a DisplayPort 1.3 device.

I've updated to use a Cable Matters DisplayPort 1.4 hub with MST and DSC support. This has allowed me to remove the DisplayLink drivers and have it 'just work' for 2 external 2560x1440 monitors.

Model number for reference is 201331-BLK.

https://www.cablematters.com/pc-1295...ayport-pd.aspx

Good luck!
dmiller, thanks for the suggestion. I purchased one of these devices and uninstalled the displaylink driver, too, and this is working well on my laptop with the latest linux kernel. I really appreciate the assist.
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Old 04-22-2021, 03:39 PM   #7
cement_head
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Default DisplayLink 5.4 & Kernel 5.11.x NOT WORKING

DisplayLink 5.3 is broken with kernel 5.11
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