Avoid boot time stall due to udev rules
The script deployed by the displaylink installer at /opt/displaylink/udev.sh is triggered by udev rules and will run:
systemctl start displaylink-driver
Under certain conditions this will trigger "udevadm settle" to block forever as it leaved processes left and can't return.
I found https://github.com/NixOS/nixpkgs/pull/51760/commits/c72bb28b9cb5138d39647f8fa12394443fea682d which fixes the issue for them.
Applying the same to /opt/displaylink/udev.sh in Ubuntu 20.04 works just fine, the boot is fast again and functionality had no negative impact.
So please could you change this line in your code to be like:
systemctl start --no-block displaylink-driver
Christian Ehrhardt
shared this idea
-
HexZero
commented
Hey, after being out of school for a while, jumping back into writing tasks felt overwhelming and I kept struggling with every draft. I was browsing student threads about adjusting to coursework when I saw professional writing services https://www.reddit.com/r/BackToClass/comments/1mbhg88/writing_papers_after_being_out_of_school_for_a/ mentioned in a real context, which made me curious enough to try it. I used it during a particularly tight week and finally saw steady progress instead of constant rewrites. That shift gave me confidence again, and I’d suggest it if you’re in the same boat.
-
Jonathan Motzfelt
commented
This.
Thanks for the fix - spend a couple of hours getting frustrated with not being able to boot my Lenovo T14 docked into a DisplayLink dock also from Lenovo. Applied this fix manually and not it worked.Please get this patched into the upstream drivers.
I'm on Ubuntu 21.10 with driver version 5.4.1-55.174, using Lenovo T14 and ThinkPad USB-C Hybrid Dock, version A40.