Windows 10: different window behaviour for HDMI and DP monitor connections when monitors powered down.

Hi there,I have been using a 2 monitor setup on my Windows 10 box for several years.I have had various CPU/GPU configurations during this time and this problem is apparent on all of them.I'm currently running an Intel i9-10900K processor and an NVIDIA RTX 3080 Ti GPU.I often leave jobs running that may take days to complete so I tend to switch off my monitors at the electrical outlet but leave the PC running.Here is the issue...When I switch the monitors back on, all the windows on the monitors connected using HDMI appear where they were when I switched them off.However, if I connect a monitor

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Windows from HDMI monitor move to DP monitor when monitors go to sleep.

Hi Bobbeloos,



Welcome to post in Microsoft Community.

I'm Mosken, I do apologize for the inconvenience that you're experiencing right now, let me help you figure it out.



According to your description, I knew that you have two external monitors of similar model connected via HDMI and DP, but when the system goes to sleep, the DP-connected monitor goes straight to black, but the HDMI-connected monitor shows "no signal" and then goes black, and when you go to sleep from sleep, the DP-connected monitor goes straight to black All windows in HDMI monitor moved to DP monitor when computer was woken up and the resolution was not normal. If my understanding is wrong, please correct me in the reply.



Based on the available information, the speculation is that when the system goes to sleep, your HDMI connected monitor will be directly disconnected, it is recommended that you turn off "Allow the computer to turn off this device to save power" by follow steps. "Win" + "X" > "Device Manager" > "Display Adapter", double click "Display Adapter" to expand the entry, you will see a list of your monitor device names, then select your external monitor device names(try both), right click > " Properties" > "Power Management" tab, then uncheck "Allow the computer to turn off this device to save power", then press Enter to confirm.



The above steps are provided based on the information I have learned so far, I wish that will be helpful to you. If your problem still cannot be solved by these steps, you could tell me the specific situation in the next reply. I will continue to assist you in solving the problem.



Best Regards,

Mosken- MSFT | Microsoft Community Support Specialist

 

Windows from HDMI monitor move to DP monitor when monitors go to sleep.

Hello!

I couldn't find anything about this issue using search engines, so I thought I'd try here!

I'm using Windows 11.

I have two monitors of the same brand and basically the same model. I have a GTX 1660 Super.

Monitor 1 is connected through DP.

Monitor 2 is connected through HDMI.

When the monitors go to sleep, the DP one simply goes black. The HDMI one says 'no signal' before it goes black.

When I wake the monitors, funky stuff happens. All the windows from the HDMI monitor will move to the DP monitor, but not in the right resolution. Slightly smaller and fuzzy maybe? Like there's a big black border around everything. I don't know. It takes about half a second for the content on the monitor to got back to normal size. I'd have to take a photo of this to explain it properly.

Anyway I have a feeling that it is happening because DP simply sleeps but HDMI disconnects before it sleeps, causing Windows to dump all the windows on the only monitor that is connected.

Is there a way I can make HDMI behave a bit closer to DP?

 

Headphone connected to monitor - DP is okay but no audio with HDMI

I have a monitor with no speakers. If I connect my headphones to my pc I get audio with both HDMI and DP cables. If I connect it to my monitor though, I only get audio with DP cable. I need it to be connected to the monitor because I use more than one device with audio, and all my devices use HDMI.

Just in case it helps, I'm running an integrated gpu, the one that comes with i7 4770. 3440x1440 50hz.

Here's what it looks like with headphones connected to monitor and HDMI cable: