KP when attempting to upgrade to 10.15.4 from 10.15.3

[sar4ras]

No it didn't. It only fixed the random kernel panics I was getting during sleep/wake. In the meantime, I've also tried unsuccessfully setting the correct type id's and various bus id combinations for the connectors and patching the Framebuffer info. None of which helped. When I hot plug either HDMI or DVI, when the other monitor is already on, I don't see any change in Hacktool or IOReg. So the second monitor is not being recognized at all.

Didn't work any workarounds to get rid of "IOConsoleUsers gIOScreenLockState 3". I reinstalled 10.15.3.

 

[matony]

I'm also stuck at this state... No boot - only with the bare Unibeast-Installer I can boot to 10.15.3

 

[sar4ras]

I tried 10.15.5, still no luck. The installer hangs at "IOConsoleUsers gIOScreenLockState 3"

 

[dalilama]

Reviving this thread for anyone who uses the HD 4600 for integrated graphics and has multiple monitors (in my case 3 monitors with a DVI, DP, and HDMI connection). I was stuck at 10.15.3 since I ran into the KP problems (IOConsoleUsers gIOScreenLockState 3) trying to upgrade. I decided to bite the bullet and see what would happen if I tried a fresh install of 11.0.1 using OpenCore 0.6.3.

Well all 3 monitors are supported and work fine. Not sure if I tried a fresh install of 10.15.7 I would have had success also, but I thought I would share this for anyone thinking of going to Big Sur.

 

[matony]

That's interesting: Which systemdefinition were you using with that? I use iMac 14,2 and BS won't install there anyway.
However I managed to patch my monitors so they show full resolution with the backdraw that I have to unplug one of them if I reboot. The problem has something to do with the "built-in" display, which has its limitations. Can you go higher than 1920*1080? And what about sleep?

 

[mahoefer]

Just finished upgrading to 11.0.1 with OC 0.6.3 and both monitors are working again with HD4600. I'm using iMac 16,2. Haven't checked sleep and the resolution of the monitors I have is only 1920x1080...