usb-c/Display-port not driving monitor but monitor is detected and shown on Nvidia settings

[himanshu.p.singh.hps]

@himanshu.p.singh.hps

When I connect usb-c docking station, and connect my monitor to it, the monitor is detected and shown in the Displays for ubuntu settings but the monitor receives no video signal (the monitor is also displayed on nvidia settings app for ubuntu). When I switched to windows, everything works fine. Tried with another usb-c to display-port adapter…and then connected my monitor to it, still same issue, monitor gets detcted but receives no video signal.

on further digging, found that only one external display is getting input at any given time. I posted another question.

Only one external monitor gets video signal, even though two external monitors get detected

I have a three display setup, 1st screen is the laptop screen, second screen is my monitor connected to physical HDMI port on my laptop, and 3rd monitor connected to usb-c port (via usb-c docking station, that has 2 HDMI outputs) which also has display-port within it. Only one external monitor gets input. If I disconnect the HDMI cable for 2nd monitor, the 3rd monitor gets video signal. If I connect the HDMI cable back for 2nd monitor, 2nd monitor gets signal and 3rd monitor screen goes black. …