Oh my, I’m back again with boot problems. A few weeks ago I posted about problems trying to boot from a USB stick but now it’s a problem booting from the proper disk. I built this system to dual boot with Windows installed first on a SSD and then Linux (Opensuse) installed on a second SSD. Everything seemed to go well, F7 showed Opensuse first on the boot list, it would boot into Grub2/Opensuse and I run either Opensuse or Windows. But I kept having ACPI Bios startup and shutdown errors and usually had to do a manual start twice to get the system to come up. The last time I did that, Windows came up instead of Opensuse and the settings in the Bios had changed. Booting with F7 select, shows the boot devices found and I can boot from any of them. The attachment, Boot options, shows Windows as Option #1 where before it was Opensuse as #1 and Opensuse has gone missing. The attachment, Boot override, shows Windows first and Opensuse second where before only Opensuse was listed. The flash disk is what I used to capture the screenshots. If I stay in the Windows world, everything starts/stops/executes with no trouble. There seems to be something about the Linux world the Z390 doesn’t like. I'm at a loss as to what is happening. The User Manual is of no help, it doesn't address how to navigate/edit the UEFI/BIOS, so I'm shooting in the dark. Frustrating.
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