Hi Akib, On Fri, Jul 1, 2022 at 4:35 AM Akib Azmain Turja <a...@disroot.org> wrote: > > Fortunately, I have Ubuntu (yet another nonfree > distribution) installed and it didn't broke, so used that to add that > 100 GB to my Guix partition. But I found that GRUB is still broken. > Then I appended "/boot/grub/grub.cfg" of Guix to the same file of Ubuntu > and managed to boot into Guix
Like Tobias, I cannot tell how Grub broke for you (although I do not dispute that it did). Grub needs to find a series of secondary files that, for EFI, are stored on the ESP. [1] For a traditional MBR/BIOS install, people use a small (1 MB or so) "BIOS Boot Partition" [2] although you probably aren't using that because your Windoze would not be able to use GPT without EFI. (Without GPT, Grub finds some place outside the partition table.) I think you are using EFI and an ESP. You may be encountering the issue that both Ubuntu and Guix are trying to manage the boot process. There is theoretically a way both Grub installations could coexist on the ESP but I am not sure they do. I personally would run Grub only in Ubuntu or Guix. In your case. it may be hard to pick one over the other. Ubuntu scans your hard drive for other operating systems, including Winblows, but probably misses Guix. Guix on the other hand may miss the other two but knows the exact paths needed to boot into your most recent "Guix System" configuration. > Is there any way to reinstall bootloader without the costly "guix system > reconfigure"? To reinstall in Guix, you may be able to run 'grub-install /dev/sdX' but that does not stop the competition between Ubuntu and Guix. I may also make it harder for you to boot into Ubuntu or Winnows. > Another non-important question: Why did Guix's GRUB broke while > Ubuntu's GRUB survived? I think they use the same folder on the ESP. Maybe there is an expert who can chime in. Thanks for using Guix! Kind regards, Felix Lechner P.S. You can boot many systems manually from the Grub shell, but it would be an extraordinary burden to type the full Guix paths for your kernel and your initrd. [1] https://en.wikipedia.org/wiki/EFI_system_partition [2] https://en.wikipedia.org/wiki/BIOS_boot_partition
