gIOScreenLockState 3 after reboot

[zeguigui]

Hello,
I upgraded from Mojave to Catalina 10.15.6. I migrated from Clover to OpenCore 0.5.9 prior upgrating to Catalina.
Catalina worked OK: dual screen, network, 5.1 audio.

But after a reboot today I get the dreaded gIOScreenLockState 3 error. I checked my bios for DVMT memory and it is set to 128M.

Only thing I changed before the reboot was my boot drive APFS partition name (from Mojave to Catalina). OC still display "Mojave" in its boot options though (not a big issue!)

Thanks

 

[zeguigui]

in fact after a few reboot, it worked once. I rebooted once again and stuck.

 

[sar4ras]

If you have two monitors plugged in, use only one monitor. but you won't be able to boot when the two monitors plugged in.

 

[zeguigui]

In fact it just booted with the two monitors plugged in but one of them took some time to be detected. Next time I get stuck I will try to unplug one (not very user friendly as I always could boot with my 2 monitors in mojave)

 

[sar4ras]

I faced the same issue with the new updates. (10.15.4 and 10.15.5) So I decided to stick with 10.15.3.
I'm using 2 monitors, one plugged to HDMI and the other to DVI.
It looks like this issue is common for 2 monitors with HD 4600 graphic setups.

 

[zeguigui]

Thanks all! Booting with one monitor off do solve this issue. I can live with this!