Q-Code A2 is unresponsive, likely related to a BIOS problem on a Multi OS setup.
Q-Code A2 is unresponsive, likely related to a BIOS problem on a Multi OS setup.
Hello everyone, I'm running a system on an older 4th generation CPU with three OS installed on separate drives. I've tried adjusting settings to resolve the problem of getting stuck on A2 after several resets and boot entries. My approach was to disable unused OSes and clear the NVRAM after restarts, but that didn't fully solve it. Based on what others have shared, it seems like a BIOS issue might be involved. Some believe it could also be a hardware fault. I've read about similar problems with multi-OS setups, and it hasn't been confirmed as a drive failure—testing with RAM checks showed no issues. This concern has persisted for some time, and I'm still looking for a reliable fix.
What bootloader version are you employing to identify the operating system? I'm focusing on entry conflicts, as turning off others reduces the risk of issues. It seems there might be overlapping entries pointing to the same destination. Are all storage devices SATA and which connectors are in use? The board appears to have two SATA controllers, so placing drives on the same or different controllers could affect the outcome.
I'm working with Opencore to set up a Hackintosh using Windows 10, Linux, and UEFI. I've tested various ports without success. My system uses a M.2 drive, while the others aren't connected via SATA.
FIXED....and it seems the bios settings were the real culprit, not related to the problem at all. The main point was enabling all USB configurations. Now there are no more duplicate boot entries. I’m confused about why this was an issue before—remember when using Clover to boot Hackintosh? It asked to turn off one of the USB settings. Probably Opemcore removed that requirement, but the guide doesn’t mention it. Here’s a screenshot of the settings in case anyone else faces this and it helps.