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Dell All-In-One display control - Inspiron 27-7700


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Perhaps a long-shot for a notebook forum, but my g/f just bought the Dell All-In-One Inspiron 27-7700 so she could have a really neat, 'no wires' look for her work area while still having a large display.  It's working fine, and it does look remarkably neat I have to say. It has a 'touch screen'. 


Today we went to plug in her Nintendo game device into the "HDMI In" port on the back. This AIO computer has precisely TWO buttons on it - 1 for power, 1 for display.  A short-press on the display button toggles the screen between external input and internal input. A 'long press' of the same button turns off the display.  But I cannot figure a way to get brightness control or volume control for the display/speakers when it is switched to the external source!  Dell support provide an 'on screen display driver' for this machine, which I have applied but there's no change. And they don't tell you 'how' this driver is supposed to work - does it present an on-screen-menu for touch-control of the brightness? Magically make use of the two buttons on the machine ...? 

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BIOS setup display/video section might have an option to set the “default” brightness of the built-in display …?


(Never seen one of these.  My best guess.)

Apple MacBook Pro 16-inch, 2023 (personal) • Dell Precision 7560 (work) • Full specs in spoiler block below
Info posts (Dell) — Dell Precision key postsDell driver RSS feeds • Dell Fan Management — override fan behavior
Info posts (Windows) — Turbo boost toggle • The problem with Windows 11 • About Windows 10 LTSC


Apple MacBook Pro 16-inch, 2023 (personal)

  • M2 Max
    • 4 efficiency cores
    • 8 performance cores
    • 38-core Apple GPU
  • 96GB LPDDR5-6400
  • 8TB SSD
  • macOS 14 "Sonoma"
  • 16.2" 3456×2234 120 Hz mini-LED VRR display
  • Wi-Fi 6E + Bluetooth 5.3
  • 99.6Wh battery
  • 1080p webcam
  • Fingerprint reader

Also — iPhone 12 Pro 512GB, Apple Watch Series 8


Dell Precision 7560 (work)

  • Intel Xeon W-11955M ("Tiger Lake")
    • 8×2.6 GHz base, 5.0 GHz turbo, hyperthreading ("Willow Cove")
  • 64GB DDR4-3200 ECC
  • NVIDIA RTX A2000 4GB
  • Storage:
    • 512GB system drive (Micron 2300)
    • 4TB additional storage (Sabrent Rocket Q4)
  • Windows 10 Enterprise LTSC 2021
  • 15.6" 3940×2160 IPS display
  • Intel Wi-Fi AX210 (Wi-Fi 6E + Bluetooth 5.3)
  • 95Wh battery
  • 720p IR webcam
  • Fingerprint reader



  • Dell Precision 7770, 7530, 7510, M4800, M6700
  • Dell Latitude E6520
  • Dell Inspiron 1720, 5150
  • Dell Latitude CPi
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