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sjoerd222

Member

Registered: 2015-09-22

Posts: 7

Issues with docking station and attached screens

I am facing problems with my screens. I have an Asus ExpertBook B49 and use it with a docking station ASUS Dockingstation SimPro Dock 2 USB-C. I tried to attach two screens through DisplayPort. There are three cases that I observer:

1) Screens detected but blank
2) Screens not detected at all
3) Screens working

Most of the time I am in case 1 (like 60%), case 2 I see in like 30% of the cases and in 10% of the cases the external monitors work as expected. As far as I understand i915 is used for graphics. Now the question is how can I investigate this?

In case the screen works as expected I see this with journalctl -e:

Nov 05 09:45:30 asus-expertbook xdg-desktop-portal-kde[2652]: xdp-kde-wayland-integration: Removing output:
Nov 05 09:45:30 asus-expertbook xdg-desktop-portal-kde[2652]: xdp-kde-wayland-integration:     manufacturer:  "Samsung Electric Company"
Nov 05 09:45:30 asus-expertbook xdg-desktop-portal-kde[2652]: xdp-kde-wayland-integration:     model:  "U28E590/HNMR305944"
Nov 05 09:45:30 asus-expertbook xdg-desktop-portal-kde[2652]: xdp-kde-wayland-integration: Removing output:
Nov 05 09:45:30 asus-expertbook xdg-desktop-portal-kde[2652]: xdp-kde-wayland-integration:     manufacturer:  "Samsung Electric Company"
Nov 05 09:45:30 asus-expertbook xdg-desktop-portal-kde[2652]: xdp-kde-wayland-integration:     model:  "U28E590/HNMR305957"
Nov 05 09:45:30 asus-expertbook xdg-desktop-portal-kde[2652]: xdp-kde-wayland-integration: Adding output:
Nov 05 09:45:30 asus-expertbook xdg-desktop-portal-kde[2652]: xdp-kde-wayland-integration:     manufacturer:  "DO NOT USE - AUO"
Nov 05 09:45:30 asus-expertbook xdg-desktop-portal-kde[2652]: xdp-kde-wayland-integration:     model:  "eDP-1-unknown"
Nov 05 09:45:30 asus-expertbook xdg-desktop-portal-kde[2652]: xdp-kde-wayland-integration:     resolution:  QSize(1920, 1080)

I am using SDDM with Plasma with a wayland session.

Sometimes when I disconnect and reconnect the docking station even keyboard and mouse are not working (attached to docking station) and then of course screens don't work at all. Do you have an idea what I can do to further investigate the problem?

Also sometimes a screen attached with DisplayPort would be flickering. I would then see this with journalctl:

Nov 05 10:29:03 asus-expertbook plasmashell[2384]: plasma_workspace_pipewire_logging: PipeWire remote error:  unknown resource 5 op:7
Nov 05 10:29:12 asus-expertbook plasmashell[2384]: plasma_workspace_pipewire_logging: PipeWire remote error:  unknown resource 5 op:7
Nov 05 10:29:14 asus-expertbook plasmashell[2384]: plasma_workspace_pipewire_logging: PipeWire remote error:  unknown resource 4 op:7

Last edited by sjoerd222 (2021-11-05 09:31:39)