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Jake Lo THANKS a lot for your time and your help!!!! your are just a fantastic person and a genius tech guy! Your knowledge is just facinating!

so using the OC files you uploaded but only changing the DSDT with mine will cause this issue? But with the other DSDT, you don't have brightness control? Let me compare them, see if it need extra patching or remove some....

'found an old Realtek RTL8139D PCI card whist clearing out old computer stuff. It's an ancient Connectland CR-CNL-FAST-R model dating back to 2008/2009... http://www.connectland.eu/products/fiche/category_id/133/culture/en/id/167/name/10-100-mbps-fast-ethernet-pci-card Gave it a shot in my old Vostro200 running High Sierra and Mojave. Installed the old IONetworkingFamily fat-binary kext from osx86.net and the card still works under macOS! First drivers for this card were released for OS X 10.1/10.2! IONetworkingFamily.kext.zip Note that the card is not supported by Mieze's RTL810x FastEthernet driver. Initially, I only installed the RTL8139 kext in /L/E and that brought the card to life but no traffic passed. The card only fully worked once I actually installed the entire IONetworkingFamily kext in /L/E, without touching the vanilla equivalent in /S/L/E. There must have been some dependancies... After the usual permissions repair + cache rebuild + reboot, the card was 100% functional. There goes an old 32bit PCI (not PCIe) card in macOS High Sierra and Mojave! Must work in all previous versions from Snow Leopard to Sierra too. vostro200:~ admin$ lspci -nn [...] 00:19.0 Ethernet controller [0200]: Intel Corporation 82562V-2 10/100 Network Connection [8086:10c0] (rev 02) [...] 04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter [10ec:8139] (rev 10) Edit: 17 Jan 2021 osx86.net now dead. Old link to file was: https://osx86.net/files/file/3172-realtek-rtl8139/