Ardman78 Posted March 18, 2018 Share Posted March 18, 2018 I've managed to get a clean install of Sierra working but have not managed to get a few hardware issues sorted out. The biggest is the audio. As soon as I install the audio kext and reboot, I get artifacts all over the screen. This doesn't happen when the kext is not loaded. My spec: Dell E6530 Latitude Intel 4000/NVS5200 Nvidia 16Gb RAM i7 Any pointers would be great. Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted March 18, 2018 Moderators Share Posted March 18, 2018 Follow instructions from here to debug issue gen_debug -sysprofile Are you running with Optimus enabled or disabled? If enabled, then you need to use BIOS A13, no higher. Known artifacts issue with higher versions of Bios. 1 Link to comment Share on other sites More sharing options...
Ardman78 Posted March 19, 2018 Author Share Posted March 19, 2018 Hi Jake I am running with Optimus enabled and everything is great until I install the Apple IDT kext into the Library/Extensions folder. However, I since found your HD4000 and Optimus pack and found a AppleHDA kext in there. I've put that in my kexts folder and the audio is working without the artifacts, so thank you Now, just need to get the Webcam working. Link to comment Share on other sites More sharing options...
Ardman78 Posted March 19, 2018 Author Share Posted March 19, 2018 I just tried to update Sierra via the App Store and whilst it appeared to install correctly, I got stuck in a kernel panic boot cycle. I reinstated my EFI folder that I backed up before the update and no different. Won't be installing the update again. Link to comment Share on other sites More sharing options...
Ardman78 Posted March 19, 2018 Author Share Posted March 19, 2018 Urgh, I got the webcam working thanks to another post on here and now my artifacts are back. Everything seems to still be working but the graphics is a little frustrating. I've tried disabling Optimus in the BIOS and I'm running A13. Any other ideas? Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted March 19, 2018 Moderators Share Posted March 19, 2018 IF you have BIOS over A13 prior, you need to downgrade to A03, then upgrade to A13. Disabling Optimus, Nvidia 5200m so far is not supported. So you need Optimus enabled to use HD 4000. Link to comment Share on other sites More sharing options...
Ardman78 Posted March 19, 2018 Author Share Posted March 19, 2018 My BIOS is A13. It works for a while. I don't use the machine, start it up and then the artifacts are back yet if I do a clean install it's working again. Link to comment Share on other sites More sharing options...
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