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Topic: SOLVED Cannot get into UEFI after BSD install attempt on external disk (Read 414 times) previous topic - next topic
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SOLVED Cannot get into UEFI after BSD install attempt on external disk

I just installed GhostBSD on an external USB disk (or tried to, not sure if it worked, but the installer showed no errors or warnings), and now I cannot get into the UEFI or grub menu any more. I can boot into a different kernel with grub-reboot <number>, but I can't get into the UEFI menu with this method (although grub has a firmware entry). The F2 or delete keys to get into the UEFI menu at boot don't work any more. Is it possible that the BSD installer installed a master boot record and I'm booting in legacy mode? (There is a long delay before the OpenRC boot screen shows up). I already tried reinstalling grub and /boot/efi/EFI/BOOT/BOOTX64.EFI. I tried setting the boot order to boot into a rescue CD to wipe my disk and reinstall from backup, but even that didn't work. Pressing the reset button didn't help (Pressing the power button or Ctrl-Alt-Del didn't work either, which exhausts the instructions in my motherboard manual).

gparted shows nothing out of the ordinary, so I didn't install to /dev/sda by mistake (as I said I can still boot, but limited to /dev/sda).

I googled for it, but it is almost all about Windows (there is one for Mint, but the guy didn't say what he did). I will post more information if needed. The reason for trying BSD is the continued i915 freezes (there has been NO progress for almost 2 years).

Edit: I can boot into an external harddisk using os-prober, grub-mkconfig and grub-reboot, so I could at least wipe the internal harddisk if needed, or use fdisk or whatever.

Edit: Suddenly it works again (and the BSD install failed, it doesn't show up in the UEFI). I have no idea what was wrong, maybe a faulty contact (could also be responsible for the i915 freezes but it doesn't explain why the 5.4 an earlier kernels still work). 
Marking as solved (the UEFI issue, not the i915 issue)