BIOS, GPT, BTRFS, using custom partitioning with two partitions (one primary root, one swap). Did I miss a flag or anything else?
I tried to install grub manually (using the Gentoo manual), but without success. Any help welcome!
grub-install /dev/sda returned non-zero exit status 1
So, do you run manually grub-install and it gives that error? Or that error is during the installation? I think we need more info... Look here: https://kaosx.us/docs/
- Edited
loopset it throws the specified error during the graphical installation.
Manual procedure:
root #mount /dev/sda2 /mnt
root #mount -t proc proc /mnt/proc
root #mount --rbind /sys /mnt/sys
root #mount --make-rslave /mnt/sys
root #mount --rbind /dev /mnt/dev
root #mount --make-rslave /mnt/dev
root #chroot /mnt
root #grub-install /dev/sdawhich yields the error
warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible
error: filesystem `btrfs` doesn't support blocklistsYou need to do more steps to make a work a combination of BIOS+GPT. See these links: https://kaosx.us/docs/bios_gpt/
and
https://wiki.archlinux.org/index.php/GRUB#GUID_Partition_Table_.28GPT.29_specific_instructions
And I suppose that the error of btrfs is related to that bad configuration of bios+gpt.
Interestingly I did add the 8MB partition before adding the rest with the graphical installer.
I got it working now by doing the whole partitioning manually with parted and just leaving everything as is in the installer. Maybe I clicked something wrong in the GUI (several times 
)
Thank you for your help!