Problem on new Ubuntu 22.04

[Thomas Sehrt]

There is a work-around, but unfortunately not the final solution.

My system information:
kernel release
user@linux-laptop:~$ uname -r
6.2.0-32-generic

kernel version
user@linux-laptop:~$ uname -v
#32~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 18 10:40:13 UTC 2

Check that the DisplayLink device is recognized on the USB bus
user@linux-laptop:~$ lsusb -d 17e9:
user@linux-laptop:~$

DisplayLink is not working. Now I reboot the system within the recovery mode.
GNU GRUB version 2.06
I choose from the lst:
Ubuntu, with Linux 6.2.0-31-generic (recovery mode)

Now all works fine.
user@linux-laptop:~$ lsusb -d 17e9:
Bus 004 Device 003: ID 17e9:6006 DisplayLink Dell Universal Dock D6000
user@linux-laptop:~$

The system information is identical to above. Why is the kernel release
6.2.0-32-generic
running and not
6.2.0-31-generic
as slected from Bootloader?

After several boots the original mis-behaviour is back.

Maybe can this description help to find out what the real root cause for disappearing of the functionality of DisplayLink is.

[rthyriur]

I have a docking station which connects: monitor (HDMI), mouse, keyboard, webcam and printer.
My biggest problem with D-Link on Ubuntu 22.04 is when connecting USB A cable. Then one of three scenario occur:

1) Keyboard and mouse doesn't work. If I type something, nothing happens. If I move the mouse, nothing happens. However, external monitor work.

2) Keyboard and mouse works, but monitor doesn't work. I know this by looking on the monitor of laptop.

3) Keyboard, mouse and monitor works. This is the best case, but happens 1 time of 10 tries.

I didn't have this kind of problems with older Ubuntu LTS versions.

Edit: Very interesting, I just had scenario 1). I disconnected webcam and connected it again. Then I got scenario 3.

I also had the problem that my output sound was gone. See attached screenshot.
I read and tried all commands related to pulseaudio. I had the same problem with Linux Mint
The only thing that works with 100% certainty. is to disconnect my docking station.
100% of the time, the sound options is back.
Webcam got built in mic and speaker. It is generic webcam, can't see any brand.

[openhbp]

https://github.com/AdnanHodzic/displaylink-debian

[davidng]

Please help, I have try everything, even switch to a new PC, still can not solve the
install the driver, displaylink ok, after reboot, not working.
then I have to uninstall, and re-install, then ok, but after reboot, not working again.

after not working, I run displaylink report tool, log attached.
note, above log, was using apt install via synaptics-repository-keyring

---------

I am on fresh install proxmox 7.4-17 with Linux kernel 5.15.116-1-pve
the displaylink device is the same in the first post of this thread.
it plug into a usb3 and passthrough to the below VM.
vm config in below attachment

----------

from post
https://displaylink.org/forum/showthread.php?t=67372
I now know,
1 linux version
2 kernel version
3 displaylink driver version
4 evdi version
are linked, and kernel update fast, and displaylink driver need some time to deploy the new driver to match those new kernels.
so never use "apt update && apt upgrade"


----------

so now I use old stuff,
1 download ubuntu-22.04.1-desktop-amd64.iso

2 downgrade the kernel to 5.15

apt list --installed | grep linux-image
sudo apt remove linux-image-6.2.0-34-generic
sudo apt install linux-image-5.15.0-43-generic

3 download the "DisplayLink USB Graphics Software for Ubuntu5.6.1-EXE.zip"
or "DisplayLink USB Graphics Software for Ubuntu5.6-EXE.zip"
from https://www.synaptics.com/products/d...wnloads/ubuntu

4 install the driver
unzip "DisplayLink USB Graphics Software for Ubuntu5.6-EXE.zip"
chmod +x displaylink-driver-5.6.0-59.176.run
sudo apt install dkms libdrm-dev
sudo ./displaylink-driver-5.6.0-59.176.run --accept

5 displaylink works
dmsg below attachment

6 after reboot didn't work.
dmsg below attachment

----------

I then try
ubuntu-22.04.3-desktop-amd64.iso
ubuntu-22.04.1-desktop-amd64.iso
ubuntu-23.04-desktop-amd64.iso
with above similar procedure

or


download synaptics-repository-keyring
apt install synaptics-repository-keyring
apt update
apt -y install displaylink-driver


or

git clone https://github.com/AdnanHodzic/displaylink-debian.git
cd displaylink-debian
sudo ./displaylink-debian.sh

all are ok after install the driver, then reboot, then not work, black screen

[xrockyx]

Any news regarding this? Have exactly the same problem. After installation, external monitor works but after the initial restart, it is not working anymore.

[davidng]

I just did another test,
same display device on the same proxmox.
but VM changed from ubuntu 22 to win10, and restart vm and display link device works.
so I guess they just don't like to fix the proxmox vm restart issue on ubuntu.