Dear all, thanks for reading this thread.

Recently I upgraded my two monitors from ASUS VS247 (dual monitors, with HDMI and DVI connectors), to DELL P2722H dual monitors (with HDMI and DP connectors). I'm connecting these two monitors to two computers - one for work (Macbook Pro 13" 2019), and for home PC (Dell XPS 8500 with upgraded GPU GTX 1650). Somehow with my old setup, everything works fine (with the ASUS dual monitors and those two computers). Now after I upgraded to dual monitors of DELL P2722H (I'm connecting my Macbook Pro through one Thunderbolt to HDMI and one Thunderbolt to DP cables, and my Dell XPS 8500 thru HDMI-to-HDMI and DVI-to-DP cable. Somehow the Macbook Pro can recognize both new P2722H monitors, but the Dell XPS 8500 can only recognize the 1st monitor (connecting via HDMI-to-HDMI cable), NOT the 2nd monitor (connecting via DVI-to-DP cable). Does anyone know what might be the root cause? Thanks!