So, seems I have figured out the issue (at least on my Lenovo T460s) and I think it lies with the Intel chip internal GPU.
If you use display port and HDMI-->Display Port adapter it won't work. The Intel chip doesn't seem to support two DP connections at a time. But you can connect Dp & HDMI-->DVI at the same time (or VGA for that matter) & Internal display. So max is 3 displays but they need to be different techs. I can't confirm this for other laptops without external graphics cards since i don't have any more. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1771185 Title: Secondary monitor not connecting in 18.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libxrandr/+bug/1771185/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
