badziew

I was able to unlock MSR register and change DVMT to 64MB using modUEFIShell. CPU power management has noticeably improved.

I have the same modem, and under Sonoma, all I get with the kext is that the modem shows up in the WWAN section of System Information, and I get an empty network service in Settings that doesn't have any configuration entries. Modem is tested to work properly under Linux.

@BillDH2k After pasting your GPU config block on top of my config, I've got HDMI with audio (1080p tested) and USB-C DP output (3440x1440 60Hz) running, and backlight control is working normally. I'm very grateful for your help. I'll try the other changes later.

Yep, that did nothing. WIth this configuration, both video outputs work, but internal display backlight control is broken. I'll try porting your GPU config block onto my config first. Thank you both for your help.

Sleep and wake with HDMI connected does nothing. Fresh boot with HDMI connected also does nothing. I have rechecked BIOS settings and they are valid. BIOS version is 1.32.0.

Hello, I have removed the unnecessary entries incl. the backlight one, and with both the framebuffer layouts you've proposed, backlight control is working. Unfortunately, I was still unable to activate the display outputs. I've checked with Fedora 39, and both HDMI and USB-C work properly. I think the hardware identification of this particular UHD 620 goes like this: Device: 00:02.0 Class: VGA compatible controller [0300] Vendor: Intel Corporation [8086] Device: UHD Graphics 620 [5917] SVendor: Dell [1028] SDevice: Device [081c] Rev: 07 I have confirmed this using the same Fedora live USB as above. It seems like 5916 and 5917 are both UHD 620. Could this one be different because there's a VGA connector present on the laptop too? Please let me know what else I can do.

Ayy, I've messed some things up a little. It's actually Kaby Lake-R, so the ig-platform-id and device-id were wrong. After fixing, display comes up after sleep. Still, no external displays present. Attached entire EFI folder without AirportItlwm and IntelBluetoothFirmware. EFI.zip

Hello, Machine specs: CPU: i7-8650u RAM: 16GB, 1 stick SSD: 256GB Intel Wifi and BT I've followed the Dortania guide, and managed to get the following things running: Internal display Wifi Bluetooth Ethernet Internal speakers Battery readout Volume and brightness hotkeys (brightness hotkeys thanks to borrowed config) Microphone (alcid 17 worked) Trackpad (works with the borrowed SSDT and other configs) I was not able to get running: Video output (HDMi, USB-C) Sleep (laptop seems to sleep, but display does not come up) Config.plist attached. I have used latest kexts for everything. Trackpad and sleep are my priorities, others I may as well handle later. Update: I have taken the SSDT and ACPI entries from GitHub - CloverLeafBG/Dell-Latitude-7490-OC-Hackintosh: OpenCore based EFI for Dell Latitude 7490, and it seems that trackpad is now up, and CPU power management is enabled also. I'll keep digging further in the meantime. config.plist.zip