Unboxed my new XPS 9300 (Ubuntu 18.04, i7, 32GB) and WD19TB dock today. I purchased this specifically for its ability to drive multiple external monitors.
After going through setup, I connected the dock and 2 x 4K monitors via DisplayPort. Only one monitor displayed video. The other is detected, appears in the “Displays” settings area, but I can’t activate it.
Occasionally, it will show as active, I can move the pointer through it, but there is no video output. Other times, both external monitors will show as detected and active, but I get no video to either of them...
Not sure how to troubleshoot from here. Any suggestions welcome! I’m very disappointed by external video problems right out the gate on a $2500 system that’s supposed to be Ubuntu-certified, and is running a Dell-supplied distro build.
Interesting additional troubleshooting: I found another Thunderbolt 3 dock in our office. This one only has a single DisplayPort output, but when I daisy-chain it after the WD19TB, all 3 monitor outputs work as expected.
Switching back to both external monitors connected to the WD19TB, the behavior reverts to only (1) external monitor working.
hi, I cant help but I am wondering how you have been getting on?
I am nervously considering buying the exact same setup for the same reasons, except I want to run 3 external displays!
This vid seems to show it working with a Latitude laptop
But Im thinking that the situation is still pretty flakey with linux laptops and multiple displays over thunderbolt/usb3.1
If you did find a way to get 3 external displays working with your setup Id be very glad to hear about it.