LG monitor won't automatically wake up from standby

I have two LG monitors (different ones) connected to my PC, one via D-SUB and the other (a newer monitor) via HDMI. When my PC goes to sleep and sends the VESA sleep command, both of my monitors shut down and go to sleep. The D-SUB monitor's light tus yellow, but the HDMI one just completely shuts off.

When I move the mouse and the screens come up from sleep, the D-SUB monitor tus on but the HDMI monitor stays off, and I have to tu it on by pressing the power button, after which it works fine. This happens both on Linux and Windows, so it's not a driver issue.

Is there a setting that shuts off the screen completely, instead of sleeping it? I always assumed it's an HDMI issue, but I figured I'd ask.

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