Custom Resolution Utility (CRU)

[Petrushka]

(12-12-2025 11:54 PM)ToastyX Wrote:  

(12-12-2025 06:54 PM)Petrushka Wrote:  Okay thanks @ToastyX! I did try disabling DDC/CI in the monitor's OSD. Unplugging the monitor's power for a minute to reset the monitors, factory resetting the monitors.

It seems a windows update started the issues as the monitors were working fine for a few months. would the DVI-D adapter bypass any handshake issues?

I was hoping that the CRU utility could force the correct resolution but I guess that is not possible with this bug?

CRU might be able to force the correct resolution with Windows 10 but not Windows 11 because Windows 11 ignores EDID overrides if the EDID can't be read. The U2412M doesn't have this issue with DVI, so an adapter should work.

Okay thanks! I was about to order DP to DVI-D active adapters when I decided to see if editing the windows registry would work. Here is what I did:

Check the PrimSurfSize.cx and PrimSurfSize.cy values: Navigate through the various keys in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuratio​n. In the right-hand pane, look at the PrimSurfSize.cx (width) and PrimSurfSize.cy (height) values. The entry showing the current low resolution (e.g., 640 and 480 in decimal) is likely your active monitor's configuration.

I basically changed all the monitors that listed only 640x480 to 1920x1200
the hexadecimal value for 1920 is 780 and for 1200 is 4b0 after making the changes. (I did backup up my registry by exporting it before making changes just in case) I rebooted the computer and got 1920 x 1200 back. You may need to do the above again after a display driver update.. but for now it seems like a fairly permanent and easy fix.