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Old 11-14-2020, 05:09 PM   #1
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Join Date: Nov 2020
Posts: 8
Default Pop OS 20.10: Docks working only through HDMI not Displayports

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 or This Lenovo USB-C Dock .

I've never experienced any trouble with these dockings before.
Attached Files
File Type: zip DLSupportTool_Output_2020-11-04T19:25:53.255962.zip (64.9 KB, 0 views)

Last edited by Crashdummy; 11-14-2020 at 05:13 PM.
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Old 11-28-2020, 10:49 AM   #2
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Join Date: Nov 2020
Posts: 8

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.
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