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Primary Monitor Dims When Connecting Second Monitor

Guest LoganBarker

By Guest LoganBarker
in Microsoft Products Support & Discussions

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Guest LoganBarker

Guest LoganBarker

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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 updatedAuto-brightness/adaptive brightness is disabledHDR is disabledNo settings are or have been changed, both in Windows and on the monitor's OSDThe monitor works

 

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