On 4/11/26 7:23 AM, Joe wrote:
but it only shows the Windows Boot Manager from a cold start.
I take it the Windows Boot Manager entry probably is still stored in the efi firmware and no longer exists on the eMMC?
What is the chance of going into the efi/bios settings (I'm talking firmware, not the os) and deleting that Windows entry? I have done that on my pc. I'm not sure all models support that. Some delete the entry automatically if you unplug the ssd and boot something else. But your eMMC is likely soldered on, so can't be unplugged.
Some efi bioses are so poor it is sad. Like a cheap mini-pc I run from time to time. Setting boot order seems to arrange the boot list via some random shuffle. It says + or - to move menu items up or down. I select the item I wish to move and hit + or - and the entire list gets randomly shuffled. So I hit + multiple times until the list is generally in an order I can live with.
I'm assuming that with NextBoot set, the menu must contain the Debian entry or it wouldn't know where to find it. After the upgrade attempt, when I was dropped to the hardware setup, the EFI boot menu was completely empty. I'm assuming the Windows Boot Manager no longer exists, and it certainly never produces its normal menu. When I change the boot order with efibootmgr, the next boot always resets the first entry to the Windows one and removes the Debian one. I won't be buying another Acer computer, but I suppose most brands do that kind of thing.
