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Old 12-02-2021, 02:22 PM   #1
marcgizmo
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Join Date: Dec 2021
Posts: 2
Default Displaylink provider but no monitor detected

Hello,

I'm trying to make displaylink work on a gentoo, everything works fine on a PC but , the same can't be said for the other one.

I got the evdi module loaded and working, and the displaylink driver (evdi 1.9.1 and displaylink driver 5.4.1-55.174)

when i plug the dock, xrandr add a second provider, but the monitor is almost never detected.

I can see the monitor EDID being registered in dmesg, i can check that the udev rule is executed (the symlink in /dev/displaylink/by-id is created)
The service is launched, i tried to run DisplayLinkManager with the debug enable but it's really unhelpfull. Can the log be translated ?


I'm not sure how to find what is not working and I have attached as much log as i could think of.


Regards,
Marc
Attached Files
File Type: txt xrandr-listproviders.txt (231 Bytes, 0 views)
File Type: txt xrandr.txt (1.7 KB, 0 views)
File Type: txt DisplayLinkManager.txt (3.9 KB, 0 views)
File Type: txt dmesg.txt (8.1 KB, 0 views)
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Old 12-03-2021, 05:12 PM   #2
marcgizmo
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Join Date: Dec 2021
Posts: 2
Default

So, i can provide further input, yet I'll still need help to understand how this works.

I can check the status of the connectors from the driver (using the command
Code:
 #for p in /sys/class/drm/*/status; do con=${p%/status}; echo -n "${con#*/card?-}: "; cat $p; done)
This tell me that the /sys/class/drm/card1-DVI-I-1 corresponding to my displaylink device switch on and off (well connected/disconnected) when i plug/unplug the hub. All fine there.

Still, i can't have it connected using xrandr.

Any help or Idea is welcome.


Regards,
Marc
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