Displaylink driver does not work since last update on August 15th 2021, after update and display config changes -> System freezes

[UPDATE] I also tried the Displaylink driver version 5.3.1 from 5th of may 2020. No Monitors externally are detected! So less functionality! I tried this version as well, 'cuz I installed the last working version somewhere in the first half of 2020. Will try now 5.3 and 5.2 (even this is not for UBUNTU 20.04). [/UPDATE]

[UPDATE2] Drivers 5.2 and 5.3 install/deinstall and reinstall to 5.4 has lead to a system, where external monitors are not detected anyway. So at least the system is now complete broken. I followed that deinstall instructions with

sudo displaylink-installer uninstall

and rebooted afterwards every time. The installation process does not seem to be very stable. [/UPDATE2]

I am using a HP USB-C Docking Station for my external periphery devices (USB keyboard and mouse, Audio, Ethernet and 2 External monitors via Displaylink driver), so that I can easily switch between my working laptop running windows 10 and my UBUNTU laptop (ASUS ROG G752VS). Till yesterday's update everything worked fine, after the update, Display link drivers did not work. So I downloaded today the latest Display Link drivers from here (I followed all steps). After the rebooting external monitors were detected nearly like before. Now my internal monitor is also detected and I cannot turn it off (either by setting it to "off" on Display settings or by just closing the laptop's lid, the system freezes (You see the monitors with a frozen mouse pointer, and no keyboard). So I cannot even run a terminal hitting "Ctrl-Alt-F[x]".

After system freezes nothing works and you have to turn off the computer by pressing "on" for 4 seconds. I varied switching the main monitor to one of my main (external) displays, which works. But if I turn off any of the monitors (so regardless whether internal or externally attached to the usb-c dock) it freezes. I also tried ARandR to exclude system internal software tooling problems. But the problem seems to lie deep in the system, I assume of the kernel or its display link module.

My HW Configuration:

• Two FULL HD monitors connected via DisplayPort and link to the USB_C dock
• ASUS ROG G752 VS running Ubuntu 20.04 LTS
• USB Mouse and Keyboard
• Logitech Sound connected analogly to the small jack of the USB-C Dock
• USB-C Dock of HP connected to USB-C/Thunderbolt of my ASUS ROG G752 VS

My SW config:

• Ubuntu 20.04 LTS with last update of Aug 15th
• Display Link driver v.5.4 from synaptics from Apr 6th 2021

Attached the latest updates as a text file (excerpt from /var/log/apt/history.log):

    Start-Date: 2021-08-01  18:16:46
Commandline: aptdaemon role='role-commit-packages' sender=':1.1473'
Upgrade: virtualbox-6.1:amd64 (6.1.22-144080~Ubuntu~eoan, 6.1.26-145957~Ubuntu~eoan)
Remove: linux-modules-5.8.0-55-generic:amd64 (5.8.0-55.62~20.04.1), linux-hwe-5.8-headers-5.8.0-55:amd64 (5.8.0-55.62~20.04.1), linux-image-5.8.0-55-generic:amd64 (5.8.0-55.62~20.04.1), linux-modules-extra-5.8.0
-55-generic:amd64 (5.8.0-55.62~20.04.1), linux-headers-5.8.0-55-generic:amd64 (5.8.0-55.62~20.04.1)
End-Date: 2021-08-01  18:17:36

Start-Date: 2021-08-15  21:17:05
Commandline: /usr/bin/unattended-upgrade
Upgrade: libexiv2-27:amd64 (0.27.2-8ubuntu2.4, 0.27.2-8ubuntu2.5)
End-Date: 2021-08-15  21:17:06

Start-Date: 2021-08-15  21:17:10
Commandline: /usr/bin/unattended-upgrade
Install: linux-image-5.11.0-25-generic:amd64 (5.11.0-25.27~20.04.1, automatic), linux-modules-extra-5.11.0-25-generic:amd64 (5.11.0-25.27~20.04.1, automatic), linux-modules-5.11.0-25-generic:amd64 (5.11.0-25.27~
20.04.1, automatic), linux-headers-5.11.0-25-generic:amd64 (5.11.0-25.27~20.04.1, automatic), linux-hwe-5.11-headers-5.11.0-25:amd64 (5.11.0-25.27~20.04.1, automatic)
Upgrade: linux-headers-generic-hwe-20.04:amd64 (5.8.0.63.71~20.04.45, 5.11.0.25.27~20.04.10), linux-image-generic-hwe-20.04:amd64 (5.8.0.63.71~20.04.45, 5.11.0.25.27~20.04.10), linux-generic-hwe-20.04:amd64 (5.8
.0.63.71~20.04.45, 5.11.0.25.27~20.04.10)
End-Date: 2021-08-15  21:18:42

Start-Date: 2021-08-15  21:18:46
Commandline: /usr/bin/unattended-upgrade
Upgrade: firefox:amd64 (90.0+build1-0ubuntu0.20.04.1, 91.0+build2-0ubuntu0.20.04.1)
End-Date: 2021-08-15  21:18:52

Start-Date: 2021-08-15  21:18:56
Commandline: /usr/bin/unattended-upgrade
Upgrade: libgnutls30:amd64 (3.6.13-2ubuntu1.3, 3.6.13-2ubuntu1.6)
End-Date: 2021-08-15  21:18:57

Start-Date: 2021-08-15  21:19:01
Commandline: /usr/bin/unattended-upgrade
Upgrade: firefox-locale-en:amd64 (90.0+build1-0ubuntu0.20.04.1, 91.0+build2-0ubuntu0.20.04.1)
End-Date: 2021-08-15  21:19:02

Start-Date: 2021-08-15  23:15:44
Commandline: aptdaemon role='role-commit-packages' sender=':1.232'
Install: libjcat1:amd64 (0.1.3-2~ubuntu20.04.1, automatic), libxcb-shm0:i386 (1.14-2, automatic), libllvm12:amd64 (1:12.0.0-3ubuntu1~20.04.3, automatic), libllvm12:i386 (1:12.0.0-3ubuntu1~20.04.3, automatic)
Upgrade: gnome-settings-daemon-common:amd64 (3.36.1-0ubuntu1, 3.36.1-0ubuntu1.1), libdrm-nouveau2:amd64 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), libdrm-nouveau2:i386 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), linux-libc-dev:amd64 (5.4.0-80.90, 5.4.0-81.91), xserver-common:amd64 (2:1.20.9-2ubuntu1.2~20.04.2, 2:1.20.11-1ubuntu1~20.04.2), alsa-ucm-conf:amd64 (1.2.2-1ubuntu0.8, 1.2.2-1ubuntu0.9), openssl:amd64 (1.1.1f-1ubuntu2.4, 1.1.1f-1ubuntu2.5), xserver-xorg-core:amd64 (2:1.20.9-2ubuntu1.2~20.04.2, 2:1.20.11-1ubuntu1~20.04.2), sane-utils:amd64 (1.0.32+git20210730-focal0, 1.0.32+git20210811-focal0), libegl-mesa0:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), openvpn:amd64 (2.4.7-1ubuntu2.20.04.2, 2.4.7-1ubuntu2.20.04.3), libglapi-mesa:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), libglapi-mesa:i386 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), bcompare:amd64 (4.3.7-25118, 4.4.0-25886), google-chrome-stable:amd64 (92.0.4515.107-1, 92.0.4515.131-1), docker-ce-rootless-extras:amd64 (5:20.10.7~3-0~ubuntu-focal, 5:20.10.8~3-0~ubuntu-focal), xserver-xorg-legacy:amd64 (2:1.20.9-2ubuntu1.2~20.04.2, 2:1.20.11-1ubuntu1~20.04.2), libxatracker2:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), gnome-settings-daemon:amd64 (3.36.1-0ubuntu1, 3.36.1-0ubuntu1.1), openssh-sftp-server:amd64 (1:8.2p1-4ubuntu0.2, 1:8.2p1-4ubuntu0.3), libegl1-mesa:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), passwd:amd64 (1:4.8.1-1ubuntu5.20.04, 1:4.8.1-1ubuntu5.20.04.1), libgbm1:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), xserver-xephyr:amd64 (2:1.20.9-2ubuntu1.2~20.04.2, 2:1.20.11-1ubuntu1~20.04.2), libdrm-amdgpu1:amd64 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), libdrm-amdgpu1:i386 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), libsane1:amd64 (1.0.32+git20210730-focal0, 1.0.32+git20210811-focal0), python3-distupgrade:amd64 (1:20.04.35, 1:20.04.36), ubuntu-release-upgrader-core:amd64 (1:20.04.35, 1:20.04.36), libfwupdplugin1:amd64 (1.3.11-1~focal1, 1.5.11-0ubuntu1~20.04.2), ssh:amd64 (1:8.2p1-4ubuntu0.2, 1:8.2p1-4ubuntu0.3), xwayland:amd64 (2:1.20.9-2ubuntu1.2~20.04.2, 2:1.20.11-1ubuntu1~20.04.2), libdrm2:amd64 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), libdrm2:i386 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), login:amd64 (1:4.8.1-1ubuntu5.20.04, 1:4.8.1-1ubuntu5.20.04.1), openssh-server:amd64 (1:8.2p1-4ubuntu0.2, 1:8.2p1-4ubuntu0.3), libgl1-mesa-dri:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), libgl1-mesa-dri:i386 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), openssh-client:amd64 (1:8.2p1-4ubuntu0.2, 1:8.2p1-4ubuntu0.3), libfwupd2:amd64 (1.3.11-1~focal1, 1.5.11-0ubuntu1~20.04.2), shim-signed:amd64 (1.40.4+15+1552672080.a4a1fbe-0ubuntu2, 1.40.6+15.4-0ubuntu7), fwupd-signed:amd64 (1.27.1ubuntu2+1.3.11-1~focal1, 1.27.1ubuntu5+1.5.11-0ubuntu1~20.04.2), libgl1-mesa-glx:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), ubuntu-release-upgrader-gtk:amd64 (1:20.04.35, 1:20.04.36), libsane-common:amd64 (1.0.32+git20210730-focal0, 1.0.32+git20210811-focal0), fwupd:amd64 (1.3.11-1~focal1, 1.5.11-0ubuntu1~20.04.2), libdrm-intel1:amd64 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), libdrm-intel1:i386 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), libdrm-radeon1:amd64 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), libdrm-radeon1:i386 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), mesa-vdpau-drivers:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), mesa-vulkan-drivers:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), mesa-vulkan-drivers:i386 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), libssl1.1:amd64 (1.1.1f-1ubuntu2.4, 1.1.1f-1ubuntu2.5), libdrm-dev:amd64 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), wireless-regdb:amd64 (2020.11.20-0ubuntu1~20.04.1, 2021.07.14-0ubuntu1~20.04.1), libsane:amd64 (1.0.32+git20210730-focal0, 1.0.32+git20210811-focal0), docker-ce:amd64 (5:20.10.7~3-0~ubuntu-focal, 5:20.10.8~3-0~ubuntu-focal), mesa-va-drivers:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), docker-ce-cli:amd64 (5:20.10.7~3-0~ubuntu-focal, 5:20.10.8~3-0~ubuntu-focal), teamviewer:amd64 (15.20.3, 15.20.6), libglx-mesa0:amd64 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), libglx-mesa0:i386 (20.2.6-0ubuntu0.20.04.1, 21.0.3-0ubuntu0.2~20.04.1), libdrm-common:amd64 (2.4.102-1ubuntu1~20.04.1, 2.4.105-3~20.04.1), shim:amd64 (15+1552672080.a4a1fbe-0ubuntu2, 15.4-0ubuntu7)
End-Date: 2021-08-15  23:16:59

Can anybody give me a hint, what else to try to fix/workaround this issue? By the way, Does anybody knows, when Display link drivers are flawlessly intergrated into the kernel anyway? Thanks a lot in advance! Please help!

Nu am găsit o soluție directă, deoarece nu am analizat suficient arborele de dependență aici. Dar am găsit o soluție pentru a remedia înghețarea afișajului și erorile ulterioare (ca urmare a strategiei mele de analiză și depanare ;-)) după cum urmează:

1. Dist-Actualizat la 20.10 și 21.04

2. Instalat Linia principală instrument pentru a instala orice versiune de kernel întreținută ușor și grafic

3. Instalați pachetele dkms și driverul proprietar al Displaylink 5.4 din 6 aprilie 21 pentru Ubuntu 20.04

4. Am primit erori de dependență în ceea ce privește kernelul v.5.13.x Se presupune că este corect versiunea kernel-ului cu numele driverului Displaylink al synaptic : displaylink-driver-5.4.0-55.153.run

5. A pornit instrumentul principal și a descărcat kernelul v5.4.0

6. S-a remediat această versiune a nucleului în configurația grub, urmând această instrucțiune Aici:

   • Mai întâi setați GRUB_DEFAULT la „Ubuntu, cu Linux 5.4.0-050400-generic”

   • Alerga sudo update-grub și primiți un avertisment pentru a schimba acest format de modă veche la următorul literal șir pentru versiunea grub2 mai mare decât v2.00: „gnulinux-advanced-8d93a8c9-e03f-413f-83f8-ea147a14bfcd>gnulinux-5.4.0-050400-generic-advanced-8d93a8c9-e03f-413f-83f4cd8-14b14c9-e03f-413f-83fcd8”

   • Puteți afla versiunea dvs. grub prin:

     $ dpkg --list | grep grub
     ii grub-common 2.04-1ubuntu45
     

   • Deci am avut o versiune mai mare decât v2.00 (aici v2.04 și ergo au luat șirul de mai sus și l-au pus în fișierul /etc/default/grub:

     $ sudo gedit /etc/default/grub
     
     # Dacă modificați acest fișier, rulați „update-grub” după aceea pentru a actualiza
     # /boot/grub/grub.cfg.
     # Pentru documentația completă a opțiunilor din acest fișier, consultați:
     # info -f grub -n „Configurație simplă”
     
     #GRUB_DEFAULT=0
     #Setat la Kernel 5.4
     #GRUB_DEFAULT="Ubuntu, cu Linux 5.4.0-050400-generic"
     GRUB_DEFAULT="gnulinux-advanced-8d93a8c9-e03f-413f-83f8-ea147a14bfcd>gnulinux-5.4.0-050400-generic-advanced-8d93a8c9-e03f-4183f-4183f-4183f-413f-4183f-413f-413f-413f
     GRUB_TIMEOUT_STYLE=ascuns
     GRUB_TIMEOUT=10
     GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
     GRUB_CMDLINE_LINUX_DEFAULT="stropire liniștită"
     GRUB_CMDLINE_LINUX=""
     
     # Anulați comentariile pentru a activa filtrarea BadRAM, modificați pentru a se potrivi nevoilor dvs
     # Acest lucru funcționează cu Linux (nu este nevoie de patch) și cu orice nucleu care se obține
     # informațiile hărții memoriei de la GRUB (GNU Mach, nucleul FreeBSD...)
     #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefefe"
     
     # Anulați comentariile pentru a dezactiva terminalul grafic (numai grub-pc)
     #GRUB_TERMINAL=consola
     
     # Rezoluția utilizată pe terminalul grafic
     # rețineți că puteți utiliza numai modurile pe care placa dvs. grafică le acceptă prin VBE
     # le puteți vedea în GRUB real cu comanda `vbeinfo'
     #GRUB_GFXMODE=640x480
     
     # Anulați comentariile dacă nu doriți ca GRUB să transmită parametrul „root=UUID=xxx” către Linux
     #GRUB_DISABLE_LINUX_UUID=adevărat
     
     # Anulați comentariile pentru a dezactiva generarea intrărilor din meniul modului de recuperare
     #GRUB_DISABLE_RECOVERY="true"
     
     # Anulați comentariile pentru a primi un bip la pornirea grub
     #GRUB_INIT_TUNE="480 440 1"```
     
     

7. Alerga sudo update-grub

8. Acum, după repornire, kernel-ul corect v5.4.0 a fost pornit acum în mediul Ubuntu din 21.04 și mi-am putut configura din nou monitoarele USB-C externe conectate cu instrumentele Ubuntu pentru configurarea afișajului.

Vă rugăm să țineți cont de faptul că pentru soluție versiunea kernel-ului este remediată acum și poate cauza probleme în viitor cu actualizările viitoare.

Știu că acest tip de răspuns nu este direct, dar poate că l-ar putea ajuta pe unul sau pe celălalt, atunci când întâmpinați astfel de dificultăți. Se pare că driverul de link de afișare este fixat la o versiune specială de kernel, deci este foarte instabil față de actualizările Ubuntu. În cele din urmă, aș sugera, repararea versiunii de kernel la v5.4 ar fi ajutat după actualizarea la Ubuntu 20.04 și toți ceilalți pași sunt poate doar o pierdere de timp.