Ubuntu 3 monitor setup : monitor connected by usb-c or mini display port not found

Hello guys,
i’ve a NVIDIA GeForce RTX 3050 6GB Laptop GPU on Ubuntu 23.10 OS .
If i try to connect monitor through usb-c dock station or through mini display port it doesn’t received any video and OS can’t detect it.
Please help me.

I was having almost same issue. I found out that nvidia is driving only one external monitor at a time. Try disconnecting one of the monitor (HDMI-0) and see if the DP-2 one gets signal. It does not solve the issue, but if this is the case, at least you will know the root cause. See my linked questions for these: