Hi.
I have dell 7490 with dell wd15 dock. Monitor connected via DP working as a charm, but second connected to HDMI port (i tried both ports - dock and laptop) is not recognized.
I found similar problem with hdmi and Fedora 28 but i don't have ' nomode set ' in grub file.
Monitor and cable is ok (checked on another device).

Any ideas?

Thanks!