I was running unraid on a pc with the following specs
CPU: 13600k
MOBO: ASUS H770
RAM: 32gb DDR4, I've upgraded from 16GB and have had the same issues on both sets of ram
I've had nothing but issues after attempting to update to 6.12.6.
I can't remember what version of unraid I was upgrading from, but I had thought it was 6.12.5
My unraid PC was working fine without issues up until I attempted to update to the OS about 2 days ago.
I had attempted to update unraid via the OS itself and it wouldn't boot into unraid at all after this, I'm not sure why as I couldn't get any kind of video output from my NAS at the time, I suspect I got a similar error to what I got now.
I made a copy of the files on my flash drive and have tried doing a clean install of unraid 6.12.6 on the flash drive using the flash creator, downloading the 6.12.6 zip file and selecting local ZIP in the creator and by manually copying the files over.
I get a kernal panic error while unraid boots. "Kernal panic - not syncing: Attempted to kill the idle task!"
I then tried doing the same with 6.12.5 and get a checksum error on one of the BZ files. It seems to be a different one each time I install the files on the drive. I do sometimes get past the the checksum errors and instead get a MCE/machine check exception error. I also occasionally got into the unraid OS itself and when I attempted to setup the OS key it said the drive was blacklisted, but the flash creator doesn't say the drive is blacklisted, I've tested the flash creator with a flash drive I know is blacklisted and it says the other drive black listed.
I have tried all this on two new flash drives, using 6.12.6, 6.12.5 and 6.11.5 and I get the same issues.
I have tried using 6.12.6 on a family members PC and it seems to boot fine.
I'm not sure what specs the PC has however.