lordmacbr Posted April 28, 2021 Share Posted April 28, 2021 Good afternoon, after updating Big Sur to version 11.3 several of the USB ports stopped working, both 2.0 and 3.0. Does anyone know how I do to solve the problem? My machine is: Z87-K motherboard Haswell processor GeForce GTX 650 Video Card 32 Gb of RAM Use OpenCore 0.6.8 with all printed drivers and kexts. Link to comment Share on other sites More sharing options...
makk Posted April 29, 2021 Share Posted April 29, 2021 (edited) Try this to see if it works before you run off and patch like crazy On my System I just use this mux and a single hotpatch SSDT. I don't have XHC limiter of any kind as a kext nor a config statement. FakePCIID_XHCIMux.kext.zip May need to play with EC settings as well. SSDT-EC.aml SSDT-USBX-EC.aml USBports.kext USBmap.kext Disable renaming or changing ECO to EC for Fake EC to load in tables (laptop version and desktop version: don't put desktop version in laptop or vice versa producing some ill. Supposedly the Problem is when AppleACPIEC attaches to EC like in the pic attached. Then you get some power for Battery to appear in System Preferences. and a few others like a real mac. However this EC on PC's is not compatible with certain os's anymore or was never. As it creates instability and is unsuitable and may produce less the good results down the road as some have procluded. (may or may not actually unless actual fried unit is given for absolute proof which I have not seen) If it ain't borked doesn't need fixing. Power problems is touchy subject. But you may lose the Battery icon and get the Energy one instead. So if you have Energy Icon in Sys Prefs. your EC is fake and AppleACPIEC is attaching to it and not the real EC Edited May 1, 2021 by makk 1 Link to comment Share on other sites More sharing options...
rendercat Posted April 29, 2021 Share Posted April 29, 2021 in my case it has been solved by changing this value in config.plist: in kernel - Quirks: change XhciPortLimit from true to false. 1 Link to comment Share on other sites More sharing options...
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