domehead100
09-19-2022, 05:09 PM
I'm on Linux but on NixOS (not Ubuntu). I'm trying to get DisplayLink working in order to drive more displays than the limit of 4 provided by the integrated GPU on my laptop.
xrandr --listproviders does not show the DisplayLink provider. The second provider is the Nvidia GPU.
$ xrandr --listproviders
Providers: number : 2
Provider 0: id: 0x48 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 4 outputs: 10 associated providers: 0 name:modesetting
Provider 1: id: 0xc9 cap: 0x0 crtcs: 0 outputs: 0 associated providers: 0 name:modesetting
As a note, this is an HP ZBook Power G9 laptop with an Intel i7-12700H CPU and an Nvidia T600 discrete GPU, but the Nvidia GPU apparently only functions in Optimus/Prime mode so I'm limited to the 4 displays provided by the Intel GPU.
As a further note, I actually have 2 docks (all displays are 1080p):
HP Thunderbolt 280W Dock G4 (off of which the laptop screen and 3 external monitors are being driven)
An HP Universal USBC/A Dock G2 (which uses DisplayLink and is what I'm trying to set up to drive 2 or 3 additional displays)
Using the fwupdmgr utility (used for updating firmware), I see the following for the DisplayLink dock:
─HP USB-C Universal Docking Station:
│ Device ID: fc6da820357c954f813bc50790f9ea7fbf0aed9b
│ Current version: 31.2
│ Vendor: DisplayLink (USB:0x17E9)
│ Serial Number: 43A5B830EEA
│ GUIDs: 3a11c4a7-a4a8-5cfc-b9aa-047dfb15f21e ← USB\VID_17E9&PID_601E
│ 3ac5f23c-a246-5799-a372-ecba091ee7e4 ← USB\VID_17E9&PID_601E&REV_3102
│ Device Flags: • Updatable
In trying to get some driver working, I think that I need to be sure of the DisplayLink chipset family to ensure that I get a compatible driver, plus just curious.
I assume that it is a DL-6000 series, but if not then I assume that someone here can tell me what it is based on the PID_601E and the REV_3102?
As far as troubleshooting...
The DisplayLink Manager service is running and looks to be version 5.6.0-59.176
[mike@mike-lap:~]$ systemctl status dlm.service
● dlm.service - DisplayLink Manager Service
Loaded: loaded (/etc/systemd/system/dlm.service; linked; preset: enabled)
Active: active (running) since Sun 2022-09-18 17:12:04 EDT; 19h ago
Main PID: 1243 (.DisplayLinkMan)
IP: 0B in, 0B out
IO: 8.7M read, 8.0K written
Tasks: 9 (limit: 76718)
Memory: 10.5M
CPU: 7.295s
CGroup: /system.slice/dlm.service
└─1243 /nix/store/h683vb4117fnsh8kwirgnr9dpy9cv1l8-displaylink-5.6.0-59.176/bin/DisplayLinkManager
The DisplayLink Manager log in /var/log/displaylink/DisplayLinkManager.log seems to be encrypted, so I can't view it. Is there some way to view that log?
xrandr --listproviders does not show the DisplayLink provider. The second provider is the Nvidia GPU.
$ xrandr --listproviders
Providers: number : 2
Provider 0: id: 0x48 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 4 outputs: 10 associated providers: 0 name:modesetting
Provider 1: id: 0xc9 cap: 0x0 crtcs: 0 outputs: 0 associated providers: 0 name:modesetting
As a note, this is an HP ZBook Power G9 laptop with an Intel i7-12700H CPU and an Nvidia T600 discrete GPU, but the Nvidia GPU apparently only functions in Optimus/Prime mode so I'm limited to the 4 displays provided by the Intel GPU.
As a further note, I actually have 2 docks (all displays are 1080p):
HP Thunderbolt 280W Dock G4 (off of which the laptop screen and 3 external monitors are being driven)
An HP Universal USBC/A Dock G2 (which uses DisplayLink and is what I'm trying to set up to drive 2 or 3 additional displays)
Using the fwupdmgr utility (used for updating firmware), I see the following for the DisplayLink dock:
─HP USB-C Universal Docking Station:
│ Device ID: fc6da820357c954f813bc50790f9ea7fbf0aed9b
│ Current version: 31.2
│ Vendor: DisplayLink (USB:0x17E9)
│ Serial Number: 43A5B830EEA
│ GUIDs: 3a11c4a7-a4a8-5cfc-b9aa-047dfb15f21e ← USB\VID_17E9&PID_601E
│ 3ac5f23c-a246-5799-a372-ecba091ee7e4 ← USB\VID_17E9&PID_601E&REV_3102
│ Device Flags: • Updatable
In trying to get some driver working, I think that I need to be sure of the DisplayLink chipset family to ensure that I get a compatible driver, plus just curious.
I assume that it is a DL-6000 series, but if not then I assume that someone here can tell me what it is based on the PID_601E and the REV_3102?
As far as troubleshooting...
The DisplayLink Manager service is running and looks to be version 5.6.0-59.176
[mike@mike-lap:~]$ systemctl status dlm.service
● dlm.service - DisplayLink Manager Service
Loaded: loaded (/etc/systemd/system/dlm.service; linked; preset: enabled)
Active: active (running) since Sun 2022-09-18 17:12:04 EDT; 19h ago
Main PID: 1243 (.DisplayLinkMan)
IP: 0B in, 0B out
IO: 8.7M read, 8.0K written
Tasks: 9 (limit: 76718)
Memory: 10.5M
CPU: 7.295s
CGroup: /system.slice/dlm.service
└─1243 /nix/store/h683vb4117fnsh8kwirgnr9dpy9cv1l8-displaylink-5.6.0-59.176/bin/DisplayLinkManager
The DisplayLink Manager log in /var/log/displaylink/DisplayLinkManager.log seems to be encrypted, so I can't view it. Is there some way to view that log?