External monitor has no signal after a seemingly random interval (Ubuntu 20.04, GTX1050TI Mobile, 455.38)

Apologies in advance if this is not the right place but I’m running out of ideas!

When connecting an external monitor either via HDMI or USB-C to HDMI port, after a seemingly random period of time the monitor signal just cuts out (display layout is not changed), and then going into the display settings triggers the montior layout to switch to just the built-in laptop screen. Have tested on multiple monitors (and the monitor itself works fine via DisplayPort on another machine connected to it)

Can’t see anything obvious in syslogs or x server logs but I’m not really sure what I’d be looking for. I didn’t see this issue when booting from a livecd usb image with the default display drivers but it could be that I just didn’t wait long enough for it to manifest.nvidia-bug-report.log.gz (391.2 KB)