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Dell Latitude 5491: UHD Graphics 630 was only showed 7M under Mojave

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Hello, below is detail hardware configure for my laptop dell latitude 5491:

  • Bios: 1.11.1
  • CPU: i5-8300H @2.3G
  • Memory: 8GB DDR4 2666MHz
  • Mainboard: DELL 0NFNN4 (CM246 Chipsets)
  • SSD: TOSHIBA 256G NVMe (primary)
  • HDD: SATA ST1000LM049  1T (second)
  • Sound: Realtek ALC256 
  • LAN: Intel I219LM7
  • Wireless/Bluetooth: Qualcomm QCA61X4A 802.11AC Wireless Adapter


I had been completely install Mojave 10.14.6 on my laptop DELL 5491. Then I find out these problems:

  1. UHD Graphics 630 was only showed 7M
  2. Sound card (Realtek ALC256) cannot work, I try inject ID 5/11/13 /21/22/28/56 But it cannot still work
  3. Touchpad cannot work


Please help me and give some suggestions to solve it.

Attachment is my config.plist





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