Given that I own a CH341, I can always revert to a working card. What are my options from now on (which both need some help from this thread ): Peeked through original GPU BIOS and got the below string(s): SSH is accessible all the times, but screen sharing is not accessible while I have yellow screen on iMac's display. I do get the exact same behaviour, boot arguments have no effect (I assume Opencore has added some GPU detection, so radpg=15 and friends are added "automagically" Tried adding the boot arguments from #16,552 post. re-installed Monterey, as I though the initial post-install scripts might had interfered with HD7000 related kexts (no luck) Edit: Just to clear things up: display works during OS installation, probably because not using acceleration. What I have tried so far for troubleshooting: If system is left at yellow screen and screen sleeps due to power management, after waking the screen, everything works as expected! (whoa!) When (I assume) system tries to enable HD7000-related kexts for hardware acceleration, I end up in a yellow screen with a working mouse cursor. pre-boot debug messages continue (normal) system shows up the Opencore boot picker, starting boot process (normal) Under 30 minutes stress test, I have 72 degrees on GPU heatsink and 74 on the GPU itself)īUT. The M5100 I acquired is physically quite similar to the original card. (As a side note, regarding #7,994 post regarding heatsink mod, I had to do no Dremel mods to the heatsink. Hardware installation went smooth, fans do not rev up, as GPU temp is read ok. Installation with stock CPU/GPU when smooth, transferred OpenCore to internal disk's EFI partition (used a new SSD).Īs the GPU had Hynix AFR memory modules, I did flash (by using a CH341) the AFR-related bios created by from post #17,336. Used (latest) OCLP 0.4.7, and created a Monterey install USB disk. I am in the process of upgrading a mid 2010 27 inch iMac. I also manage my way around hardware and had upgraded almost all the Macs that have passed though my hands in the last 15 years. I do consider myself an experienced user, as I do support enterprise linux systems for a living.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |