snoupy

Hi Edkroket, My system is stable since two weeks for basic use. I didn't do heavy work. Here is my EFI. Just removed BID and serials. Hope it will help, good luck ! EFI.snoupy.zip

Are you connected on the 1080Ti or internal ? Did you try with boot arg agdpmod=pikera ? I switched to a Sapphire Radeon RX 570 and my 4K through HDMI work so far. My boot args: alcid=1 shikigva=0 watchdog=0 -no_compat_check (shikigva=0 may not be useful ?)

Yes done. Happens easy when opening App Store in full screen, or playing a video. Still searching...

Worked without TBH3 Working now on display freeze on RX570 it seems happening when system use HW acceleration Here is my actual EFI EFI.zip Here is a kernel log about GPU Resetting Kernel_2021-05-07-092316_iMac-de-Thierry.gpuRestart.zip

Did not make the trick... Still searching for a patch, I found today that thunderbolt causes crash. Disabling TB in bios works for sleep/wake correctly.

Finally got graphics working by removing agdpmod=pikera from boot-args Last point is sleep, when computer enter sleeps, when wake on, reboot to bios. Any idea ? Thanks

Strange I cannot set resolution higher than 1080 on my 4K display

here it is iMac de Thierry.zip

Thanx for your fast reply ! I think I'm near the end, just have to re-enable the RX570 (driver don't load), any idea ?

here is the new dumped files: https://www.visioco.ch/files/Send-me-iMac-de-Thierry-v2.zip Thanks for your help! Just sent a PM Thierry

Partially working with i9 10850K, RX570 and Samsung NVMe and Big Sur. Need help to get all USB ports working, could not achieve it, neither Thunderbolt. Can you check my config please ? https://www.visioco.ch/files/Send_me_imac-de-thierry.home.zip Thanks a lot for your guides ! Thierry