Pop OS 20.10: Docks working only through HDMI not Displayports

[Crashdummy]

Hello there,

I am able to install the displaylink driver quite fine, however the Monitors connected on Displayports refuse to work.
I can't exactly tell since when these issues occurred as I weren't using my dock for quite a while now...
I could use these connections fine around kernels 5.5 - 5.7 for sure.

I did a clean install of Pop OS 20.10. to stay clear of any side effects.


|18:56:02|crashdummy@pop-os:[~]> neofetch
///////////// crashdummy@pop-os
///////////////////// -----------------
///////*767//////////////// OS: Pop!_OS 20.10 x86_64
//////7676767676*////////////// Host: Surface Pro 7 124I:00046T:000M:0100000D:0B:07F:0C:05P:48S:1E:0Y: 0K:0U:06R:2
/////76767//7676767////////////// Kernel: 5.9.8-surface
/////767676///*76767/////////////// Uptime: 11 mins
///////767676///76767.///7676*/////// Packages: 2871 (dpkg), 6 (flatpak), 4 (snap)
/////////767676//76767///767676//////// Shell: bash 5.0.17
//////////76767676767////76767///////// Resolution: 2560x1440
///////////76767676//////7676////////// DE: GNOME 3.38.1
////////////,7676,///////767/////////// WM: Mutter
/////////////*7676///////76//////////// WM Theme: Pop
///////////////7676//////////////////// Theme: Pop-dark [GTK2/3]
///////////////7676///767//////////// Icons: Pop [GTK2/3]
//////////////////////'//////////// Terminal: x-terminal-emul
//////.7676767676767676767,////// CPU: Intel i5-1035G4 (4) @ 3.700GHz
/////767676767676767676767///// GPU: Intel Iris Plus Graphics G4
/////////////////////////// Memory: 2484MiB / 7556MiB
/////////////////////
/////////////



sudo dkms status
evdi, 1.7.0, 5.8.0-7630-generic, x86_64: installed
evdi, 1.7.0, 5.9.6-surface, x86_64: installed
evdi, 1.7.0, 5.9.8-surface, x86_64: installed
system76, 1.0.9~1597073326~20.10~5b01933, 5.8.0-7630-generic, x86_64: installed
system76, 1.0.9~1597073326~20.10~5b01933, 5.9.6-surface, x86_64: installed
system76, 1.0.9~1597073326~20.10~5b01933, 5.9.8-surface, x86_64: installed
system76_acpi, 1.0.2~1600812457~20.10~0bc966c, 5.8.0-7630-generic, x86_64: installed (original_module exists)
system76_acpi, 1.0.2~1600812457~20.10~0bc966c, 5.9.6-surface, x86_64: installed (original_module exists)
system76_acpi, 1.0.2~1600812457~20.10~0bc966c, 5.9.8-surface, x86_64: installed (original_module exists)
system76-io, 1.0.1~1559663713~20.10~ea5f61a, 5.8.0-7630-generic, x86_64: installed
system76-io, 1.0.1~1559663713~20.10~ea5f61a, 5.9.6-surface, x86_64: installed
system76-io, 1.0.1~1559663713~20.10~ea5f61a, 5.9.8-surface, x86_64: installed



|18:57:17|crashdummy@pop-os:[~]> lsmod | grep evdi
evdi 53248 4
drm_kms_helper 221184 2 evdi,i915
syscopyarea 16384 2 drm_kms_helper,evdi
sysfillrect 16384 2 drm_kms_helper,evdi
sysimgblt 16384 2 drm_kms_helper,evdi
drm 544768 14 drm_kms_helper,evdi,i915

|18:59:36|crashdummy@pop-os:[~]> xrandr --listmonitors
Monitors: 2
0: +XWAYLAND0 2736/260x1824/170+2560+239 XWAYLAND0
1: +XWAYLAND1 2560/700x1440/400+0+0 XWAYLAND1


0 is the builtin monitor of my device.
1 Is the monitor I connected with HDMI to my USB-C Docking.

I am using This Dock from i-tec (https://i-tec.pro/en/produkt/catriple4kdockpd-2/) or This Lenovo USB-C Dock (https://www.lenovo.com/us/en/accessories-and-monitors/docking/universal-cable-docks-usb/tp-usb-c-dock-gen2-us/p/40AS0090US) .

I've never experienced any trouble with these dockings before.

[Crashdummy]

Update: Restarting the displaylink service appears to get the second monitor to run:



|12:44:33|crashdummy@pop-os:[~]> sudo systemctl restart displaylink-driver
|12:44:33|crashdummy@pop-os:[~]> systemctl status displaylink-driver
● displaylink-driver.service - DisplayLink Driver Service
Loaded: loaded (/lib/systemd/system/displaylink-driver.service; static)
Active: active (running) since Sat 2020-11-28 12:44:26 CET; 37s ago
Process: 19260 ExecStartPre=/bin/sh -c modprobe evdi || (dkms install $(ls -t /usr/src | grep evdi | head -n1 | sed -e "s:-:/:") && modprobe evdi) (code=exited, status=0/SUCCESS)
Main PID: 19262 (DisplayLinkMana)
Tasks: 48 (limit: 8913)
Memory: 73.9M
CGroup: /system.slice/displaylink-driver.service
└─19262 /opt/displaylink/DisplayLinkManager

Nov 28 12:44:26 pop-os systemd[1]: Starting DisplayLink Driver Service...
Nov 28 12:44:26 pop-os systemd[1]: Started DisplayLink Driver Service.