The only issue I have with external monitors on my M2 Pro – and it’s admittedly annoying – is that unless I turn everything on in a specific sequence, the primary monitor’s energy saving kicks in and turns off the screen before the Mac has synced video. It essentially bootloops.

This only happens on my Acer Predator, and only if I’m using DP —> USB-C. The secondary LG doesn’t care, nor does the Acer if it’s over HDMI.

The fix I’ve found is to wake up the Mac first with the external keyboard, then turn the Acer on and wait for sync, login, then turn the LG on.

While I’d obviously rather not have to deal with this, I feel like it’s at least partially on the incredibly aggressive power saving of the Acer, which I can’t find any way to disable or extend the timeout of.