[Solved] gIOScreenLockState 3 error on High Sierra first boot in GA-Z97X-UD3H

[ilyad]

UPDATE: The whole internet is telling me that the GT4XX era is over in High Sierra. It's time to give up Just bought a GTX 1050

Did this solve the gIOScreenLockstate boot-crash?

 

[Otuku]

successfully installed an nvidia card (GT740) under the same motherboard, but...
faced the 'gIOScreenLockState 3' each time I booted with "nvidia webdriver option set in clover"

what I did to pass over this issue :
- disable IGFX and boot through PCIe
- disable Audio (that create the respawn 10sec)
- in clover boot menu, chosse inject nvidia but not the webdriver


full installation as usual, then multibeast, inject nvidia but no fix, no webdriver,
alc1150 audio + serie 200 option
usb3 serie 7/8/9 + serie 200 max limit

not sure it is needed for USB3 but disable all *HCI Handoff too

This issue was also solved for me by disabling iGFX.

 

[webnik]

This issue was also resolved for me by disabling iGFX. Once installed I can enable iGFX without issues if needed.