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View PC info
How ever when I connect the monitors ( tested both HDMI and DP ) they detect that they are connected, but get no signal and Linux doesn't see new screens connected either.
( when I plug directly into the single onboard HDMI the screen is instantly reconised )
Annoyingly my co worker running windows ( on the exact same model laptop ) it just instantly works.
At home on the same laptop I use a Dell D300A to connect a single 4K monitor and that works flawlessly.
So I guess there is a driver issue at work here, specifically that maybe Linux doesn't support the ThinkPad dock's display module (network, power and usb worked fine)
Does anyone have experience with USB-C docks connecting to multiple external monitors on linux?
The "ThinkPad USB-C gen 2 dock" (40AS0090EU) might work but I'd rather not spend another 300€ on something that will ultimatively not work
No promises, just a suggestion.
https://wiki.archlinux.org/title/ThinkPad_docks
It looks like that device uses DisplayLink. There are some known issues and some troubleshooting tips here:
https://wiki.archlinux.org/title/DisplayLink
HTH,
View PC info
Looks like that is for the "old" thinkpad docks - the one in question uses usb-c
Nothing is ever simple - seems most docks bury weather they use DP MST or DL deep in the manual so it's not even searchable. oh well now atleast I know what to look out for ;)
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Fingers crossed that it's not incompatible with my laptop or screens in some other way
Like that time the exact same model of webcam would use completely different chips and one would work in Linux and the other wouldn’t and the only way to find out which one you had was to open the case and look inside… ffs.
View PC info
Thank fully that one worked, it's a little anoying that I had to activate each screeen in turn and that every time I did that or changed the relative position Linux would turn off all screens ( including the laptop one ) and 'have a think' for several long seconds.. but hey it actually works :D
Better still connecting the laptop to my home dock it actually remembers the config there ( primary screen, DPI settings, relative positions and perscreen fractional settings )