Which lenovo dock were you using? I was recently looking at getting the lenovo USBC gen2 (40AS) dock which I am pretty sure uses displayport alt mode and not displaylink.
this post was submitted on 19 Jun 2023
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Not a direct answer to your question, but I have a Dell TB16 dock. It does not work well - it sporadically fails to output display to my monitors and it does not charge my non-dell personal laptop (a Lenovo Yoga 730). However, it works great for my Dell work laptop running windows...
Just adding this Incase you see it on sale or something - take it for what it's worth!
The Dell dock works great with my framework after I installed their display link drivers (proprietary blob unfortunately).
The display link drivers are the problem for me. Makes everything so unstable.
Its the worst for Linux, but works great if you need video out on an android device without video output.
Probably Thunderbolt docks are better. Should also provide better performance as Display Link compresses the video stream on your CPU before sending over USB.
I have to use Windows because of the docking station problems with Lenovo..
The only feasible workaround for me was to use the HDMI out for the display and the station for the rest but that defeats the purpose of said station.
I did get it somewhat working by switching to Ubuntu in combination with the Ubuntu display link driver. But it's never stable