On Wed 20 Jan 2021 at 20:31:53 (-0800), Dan Hitt wrote: > […] > The second question is whether there's a way, from grub (grub2, actually), > of dropping down to the bios. I imagine this is quite impossible, but if > i'm wrong, please let me know. The reason i would like to do this is that > it is very hard for me to interrupt the boot process fast enough to get to > the bios, and i've only managed to do it once or twice after many tries. > If i were in the bios, i might be able to figure out if it could boot from > usb, and i could set the boot order to do this, and make a bootable usb > version of netinst (perhaps).
I think this question got overlooked earlier. If by "bios" you mean BIOS/CMOS/UEFI, then there might be. I have noticed that my AiO Dell has the following paragraph inserted into grub.cfg: ### BEGIN /etc/grub.d/30_uefi-firmware ### menuentry 'System setup' $menuentry_id_option 'uefi-firmware' { fwsetup } ### END /etc/grub.d/30_uefi-firmware ### This is all new to me as the Dell is my first PC that I boot through EFI. (My other EFI-capable PC still boots linux via BIOS because Windows was pre-installed with EFI.) The effect of selecting this grub entry is exactly the same as pressing F2 durimg POST and before the grub menu pops up. I suppose the mechanism might be contained in the grub module: root root 2216 Jul 30 18:18 /boot/grub/x86_64-efi/efifwsetup.mod Cheers, David.