Windows 10: Monitor stuck at 4K@30hz after Windows update

I just installed a new Windows update today 30/03/2023 and after the installation, my monitor was on 30hz. Before the update, the monitor was at 4K@60hz and I did not change anything on my setup or my settings. After the update, the monitor was at 30hz, I looked into Display settings -> Advanced display settings -> Adapter properties -> List modes, and the 3840x2560 60hz mode is missing and it was there before. My monitor is Samsung U32J59x.

:)

 

HDR and WCG will not turn on for 4k 60hz, only 30hz.

Hi UmeedMalik,

Issue like this might be due to an outdated videocard driver. I'd like to get more information regarding this so we could further check and provide a more established workaround. Please answer the following:

1. What is the current build and version of your Windows 10?
2. Is this the first time that you are trying to connect your PC to your TV?
3. What type of cable did you use to connect your computer to your TV?

In the meantime, try the following suggestions to isolate the issue:

• Download and install all the suggested Windows cumulative and security update.
• Install the latest video card driver. Download it directly from the manufacturer's website.
• Use a different HDMI cable. Check if your video cable supports 4k 60hz resolution. Some HDMI cable only supports 30hz at 4k.
• Try connecting your PC to you TV alone. This will help us eliminate hardware conflict issues.

If you would like me to provide additional advice, simply respond to this thread. I will get notified and I’ll reply to you as soon as I can.

 

Hdmi and 4k 60hz/30hz Questions

I used an old dell xps 15 9550 for many years. Will no longer be using it anymore and will be using a new laptop. Had it connected with 2 external monitors... one is 32' 4k monitor via usb-c to displayport cable. The other 24' 1920x1200 monitor I connect it via hdmi to dvi cable.



1. The hdmi port on this xps 15 9550 laptop seem to be 1.4? What is the max resolution I could actually done with the hdmi port? They hdmi port no longer works anymore but could I have done 4k resolution? If so, it would be 30hz correct?



2. I also heard you do not want 4k at 30hz because there is lag... correct? So whether you have 1 external monitor or 2 external monitor, you never want 30hz and always want 60hz? But if you just do basic things, then 30hz isn't an issue? I heard there was some lag with 30hz but that is only if you play games or do something intensive?



3. When I had set up the 2 external monitors, I did this with those 2 cables and no docking station or anything like that. Now i know the 32' 4k monitor was 60hz. But when I am using 1920x1200 resolution on the 24' monitor that is connected from hdmi to dvi, am I getting 60hz or not? I recall it showed that a while back when I checked the monitor settings but I'm not sure. Would it been possible it was 1920x1200 at 30hz? The other thing is if it was 1920x1200 at 30hz, would I notice unbearable lag?



4. So when looking at a laptop, if they mention an hdmi port, make sure it is at least hdmi 2.0 in order for that hdmi port to do 4k resolution at 60hz right? I heard there is hdmi 1.2 and 1.4. So 1.2 can't even do 4k and max is 1920x1080 at 60hz?

 

Can't change refresh rate to 60hz cuz Windows only shows 30hz

Connected my monitor (Samsung UH750) over HDMI 2.1 to my PC (750 TI with no DisplayPort) and it is stuck at 30hz even though the monitor has 60hz. The HDMI 2.0 cable supports 4k & 60hz also the monitors HDMI outputs support 60hz. Still Windows only shows
30hz or below (Windows 10) I also have installed latest drivers. Any help is welcome.