Black screen after recent Sierra upgrade (Probook 450 G1)

[ggrpitt]

I apologize if this is a duplicate, but a search of the site did not shed any light on the matter.

I am still using Sierra in my Probook, but a recent upgrade broke something. Now the screen dims to black right after the apple logo and can't get the screen to brighten up even after booting. Disabling FakePCIID_Intel_Gbx.kext seems to solve the problem, but then I lose control over the screen brightness. Any advice?

Thanks!

 

[RehabMan]

I apologize if this is a duplicate, but a search of the site did not shed any light on the matter.

I am still using Sierra in my Probook, but a recent upgrade broke something. Now the screen dims to black right after the apple logo and can't get the screen to brighten up even after booting. Disabling FakePCIID_Intel_Gbx.kext seems to solve the problem, but then I lose control over the screen brightness. Any advice?

Thanks!

No "Problem Reporting" files attached.
Read FAQ, "Problem Reporting" again. Carefully. Attach all requested files/output.
https://www.tonymacx86.com/threads/faq-read-first-laptop-frequent-questions.164990/
Use the gen_debug.sh tool mentioned in the FAQ, that way it is less likely you'll omit something.

Note: Your laptop does not use FakePCIID_Intel_GBx.kext. Perhaps you failed to follow the guide:
https://www.tonymacx86.com/threads/...book-zbook-using-clover-uefi-hotpatch.261719/

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