Windows 10: Windows 11 Update - Monitors have gone very dim

After the most recent Windows 11 updates both of my monitors have gone very dim and I am unable to restore the brightness. Looking through Google changing the adaptive brightness seems to be one solution, but I don't have an adaptive brightness option.

:)

 

Primary Monitor Dims When Connecting Second Monitor

I'm currently using an LG 34UC79G-B monitor as my primary display and a Samsung CF390 as my secondary display, running Windows 11.

When the LG is utilized as the sole monitor (display settings set to "Only Show on 1"), the monitor works fine, brightness is great. However, when I switch to "Extend Desktop" to utilize a second monitor, the main monitor dims fairly significantly.

Additional information:

• GPU drivers and Windows are fully updated
  
• Auto-brightness/adaptive brightness is disabled
  
• HDR is disabled
  
• No settings are or have been changed, both in Windows and on the monitor's OSD
  
• The monitor works great at all times, except when I'm using two monitors
  

UPDATE: I switched my primary display to HDMI instead of DP and the issue stops. However, it's a 144Hz monitor, so running HDMI instead of DP cuts my framerate.

What in the world could be causing this?

 

Why did the startup window get cleared?

I didn't missed any step, the list was gone and gone , even after using lot of programs the programs were not listed in that list.

 

Monitor Dim and Flickers

I have a new Dell Inspiron 3668 cpu and running it with my old Dell ST2010 I have run the windows "troubleshoot screen flickering in Windows 10" from Windows help. When I go to task Mngr. it still flickers. So, I uninstalled the display driver as suggested
and then ran the "Check for updates". The problem still remains. Any further suggestions?? My next step is to just replace the monitor and assume Windows 10 will not run it!