Question Multiple Monitor Sleep Issue

[billin30]

I just got a new LG C3 42" to add to my monitor collection. Layout is like this:



4 = LG C3, HDMI

1 = U2717D, 1440p, DP

3 = AW3418DW, 1440p UW, DP

2 = U2719D, 1440p, DP

GPU = RTX 4090 FE

OS = Windows 11 Pro, fully up to date

I don't always have the C3 on. I use this setup to work from home and mainly use monitors 1-3 only while working. The C3 is for gaming and watching TV.

The issue occurs when my PC goes to sleep. When coming out of sleep, only monitor 1 comes back on. In order for monitors 2 and 3 to come on, I have to turn on the C3. I can turn it back off right away, but that's annoying and I never had this issue with the previous 4k TV I had connected in the same configuration.

I ran DDU to remove the graphics drivers and reinstalled clean to see if that would help, but the issue persists.

Power Saving is OFF on monitors 1-3.

I turned off Hibernation in Windows.

Has anyone had any experience with this and know a solution?

Thanks

 

[Ralston18]

What about monitor drivers? Are you using (if and as applicable) the monitor manufacturer's drivers or just the Windows?

Also take a look in Reliability History/Monitor. Any error codes, warnings, or informational events being captured when the PC comes out of sleep and Monitors 2 and 3 fail to start?

Or during the process of turning C3 on and off again?