HDMI connected monitors not recognized

[shenaj]

I had my MacBook Pro set up this morning on the dock with three external monitors. I have been running it this way for months. I relocated my computer to another room and hooked everything back up, but the monitors that are connected by HDMI are no longer working. The VGA monitor is working fine.

I have switched the cords to different monitors and each one will work if hooked to the VGA, but none work hooked to HDMI. When I go into Displays, only one external monitor is showing (the one hooked up by VGA). Does anyone have any advice?

[tkholmes2]

Following this. Same problem. It suddenly started today. My M1 goes to sleep and when it awakes, the monitors are not detected. I updated my DL software yesterday. The only way I can get the monitors detected is to restart my computer.