I have an HP laptop, using the laptop monitor and 2 HDMI monitors- One connected through the PC’s HDMI port and the other through USB and Display link adapter. This has worked fine for years.
This morning Only one external monitor will work at a time. It defaults to the display link monitor, but the HDMI port will be come active if the USB is unplugged.
Also when all are plugged in the display link manage sees 3 monitors, but 1 is grayed out