both kext files should be in the S/L/E folder, not sure what to tell you.Unfortunately, I didn't see your post until after I had already upgraded and have the flickering screen problem so many others are seeing. Do you have any ideas on how to fix this? Also, I can not locate the 9510Controller.kext you mentioned. AMD4100.kext is present in /Library/Extensions as expected.
It appears we're not alone. Another user -erroruser- is having the same issue and graciously supplied a video.
I'm relatively certain the base kexts for the HD5000 series wasn't touched (looking at the file dates) however there is an updated IOGraphicsFamily kext. I'm at a loss.
That's it I've stayed silent long enough hoping a fix will come along to put a stop to this dam disco screen from the ATI 5770 graphics card and I'm too darn old to start body popping every time this machine reaches the desktop. That's the only thing that broke with the update, so tomorrow I'm taking delivery of a Gigabyte Nvidia GTX 750TI, so there's a possibility I will be begging and borrowing a few tips of 'How To's' according to how the installation goes. That's what I loved about me old 5770's (actually bought two, use one one the test rig) worked straight from the box, no fuss, no drama with every update until now.
I think you can do it manually if you can't use Unibeasthi. i have same problem. new usb stick dosent run. so maybe Unibeast will update and our problem will solve. or somebody explain about clover update? basicly
I seemed to have resolved my issue by generating a new SSDT with ssdtPRGen.sh v21.5. I also removed the -xcpm boot flag from my config plist as I just discovered Ivy Bridge support for XCPM has been removed from Sierra. Not entirely certain why or how any of these changes corrected my flickering problem but it has survived multiple reboots without reappearing.
Thank you very much. I had the same problem and now it works like a charm. Do you think the lowest brightness level on this version is brighter than the previous versions (with IntelBacklight.kext)?