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W10 dimming desktop on logon

ziogref
By ziogref
in Troubleshooting
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Ever since I got the creators update when I boot my pc I can see the brightness dim, it's driving me mad.

It's not Auto Brightness or night mode.

 

I'm using a Asus GTX980 Poseidon connected via DisplayPort to my LG Ultrawide 29UB55

 

As you can see in video the brightness just drops instantly at 14s in the below youtube video. I can't find the setting that would cause this.

 

I have also tried changing the theme (Flowers) and it still did it on that aswell so it's not a theme setting.

 

I also just tried my TV connected via HDMI and it didn't do this. (LG OLED) and tried connecting my monitor (The LG ultrawide) using the same HDMI cable and it still dims.

I'm beginning to think its my monitor but I don't know why it would have only started with the creators update also I am hesitant to reset my monitor as it is factory colour tuned from LG.

 

Does anyone have any ideas?

 

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Have you ever DDU in safe mode and reinstalled the GPU Drivers? since you did a major windows update and all might consider it.

Personal Desktop":

CPU: Intel Core i7 10700K @5ghz |~| Cooling: bq! Dark Rock Pro 4 |~| MOBO: Gigabyte Z490UD ATX|~| RAM: 16gb DDR4 3333mhzCL16 G.Skill Trident Z |~| GPU: RX 6900XT Sapphire Nitro+ |~| PSU: Corsair TX650M 80Plus Gold |~| Boot:  SSD WD Green M.2 2280 240GB |~| Storage: 1x3TB HDD 7200rpm Seagate Barracuda + SanDisk Ultra 3D 1TB |~| Case: Fractal Design Meshify C Mini |~| Display: Toshiba UL7A 4K/60hz |~| OS: Windows 10 Pro.

Luna, the temporary Desktop:

CPU: AMD R9 7950XT  |~| Cooling: bq! Dark Rock 4 Pro |~| MOBO: Gigabyte Aorus Master |~| RAM: 32G Kingston HyperX |~| GPU: AMD Radeon RX 7900XTX (Reference) |~| PSU: Corsair HX1000 80+ Platinum |~| Windows Boot Drive: 2x 512GB (1TB total) Plextor SATA SSD (RAID0 volume) |~| Linux Boot Drive: 500GB Kingston A2000 |~| Storage: 4TB WD Black HDD |~| Case: Cooler Master Silencio S600 |~| Display 1 (leftmost): Eizo (unknown model) 1920x1080 IPS @ 60Hz|~| Display 2 (center): BenQ ZOWIE XL2540 1920x1080 TN @ 240Hz |~| Display 3 (rightmost): Wacom Cintiq Pro 24 3840x2160 IPS @ 60Hz 10-bit |~| OS: Windows 10 Pro (games / art) + Linux (distro: NixOS; programming and daily driver)
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Night light settings, f Lux?

I have a cue light I can use to show you when I’m joking, if you like.

 

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TBH that doesn't look like it is being Dimmed looks more as if a Contrast setting has came into play. If it was a brightness setting from Windows it would have register that during the Logo screen not later on.

 

But I could be wrong. Maybe a setting among your GPU causing this?

Some people prefer a challenge, I just band my head against a wall until my method works...

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