On 02/07/2020 06:56, Peter Humphrey wrote: > But then, > # bootctl set-default 30-gentoo-5.7.7.conf > Failed to update EFI variable: Invalid argument
Probably the kernel is blocking write access to EFI. This is on purpose for safety as you can damage your firmware quite easily. systemd-boot and others do not have this restriction. You also should be careful writing to the EFI too much as the NVRAM flash may not be of high quality. https://lwn.net/Articles/674940/ You can try using `chattr -i` against the files like: chattr -i /sys/firmware/efi/efivars/Boot* Then you can try with bootctl and others, but this is not guaranteed to work. On my ASUS motherboard I haven't been able to write to EFI variables from within Linux for a long time. I have to add my keys in the BIOS and set the default in systemd-boot. The logic to write to a file in efivars is here: https://github.com/torvalds/linux/blob/master/fs/efivarfs/file.c#L15 If you use strace with bootctl you'll probably see one of these errno values. Andrew
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