I believe the board and APU came out around 2014. The cpu is an AMD AM1. The mother board is the gigabyte AM1M-S2H.
The specification for that board is here: https://www.gigabyte.com/Motherboard/GA-AM1M-S2H-rev-10#sp On the BIOS column it says: 1 x 32 Mbit flash. Does that mean that the firmware is 32-bit? I’m not sure… Just to clarify, my desktop machine did detect that the usb could be booted via UEFI or via legacy boot. I could either choose to boot guixSD via UEFI or via legacy. I could only get it to boot properly the legacy way. When I chose the UEFI option, it hanged. BUT to be sure, I entered my bios and now my computer will only boot in UEFI mode. When I tell my computer to boot via the usb (using UEFI and booting GuixSD), it fails to boot at some point. Here’s some of the last entries: snd_hda_codec_realtex hdaudioC1D0: …. [drm] radeon kernel modesetting enabled …. AMD IOMMUv2 driver by Joerg Roedel … CU CPU: cores=4 id_base=0 … found cache entry in CRAT table with processor_id=1 ... Creating topology SYSFS entries Finished initializing topology ret=0 kfd kfd: Initialized module fb: switching to radeondrmfb from EFI VGA Then it hangs and does nothing more. I’m assuming that it is has something to do with the APU, but I don’t know. Actually, it could be that Arch Linux uses a vanilla kernel. Perhaps the linux-libre kernel doesn’t ship with some certain needed proprietary firmware…actually I’m reading online on several places (online) that this is a problem with mode setting the radeon driver. If I change the grub command line to disable modesetting, then I may be able to boot properly. The problem is that I don’t see grub anywhere in my boot process. After I turn on the machine, I see a splash image of Gigabyte logo, then I immediately see my boot options. Arch Linux, or reboot into firmware. I can’t seem to figure out how to get to the grub command prompt to tell it that I want to boot the usb via UEFI, and disable mode setting…..I think the reason why I do not see grub loading, is because I am using systemd-boot and not grub. hahah. No wonder I can’t read the grub command prompt. So now I need to uninstall systemd-boot, boot via grub, then I’ll be able to get to the grub command prompt. Ok, I booted Arch Linux. uninstalled systemd-boot. Installed grub. Now I am trying to boot the usb stick via UEFI. systemd-boot was smart enough to realize that I had a usb stick that wanted to boot. Default grub doesn’t seem to be…That’s ok. I can do this manually. I go to a grub command prompt, and am I trying to get the usb to boot. Chainloading it didn’t work. aka: set root=(hd0,gpt5) chainloader +1 boot So now I am trying to get grub to boot the usb stick to boot via UEFI. Since I’ve disabled booting in legacy mode in my bios, it should boot via UEFI. set root=(hd1,gpt5) linux (hd1,gpt1)/vmlinuz-linux rw root=/dev/sda5 nomodeset initrd (hd1,gtp1)/initramfs-linux.img boot gpt5 on the usb stick is the root. Label “my-root.” and gpt1 is a fat filesystem. So I guess I’m choosing the right partitions. though is /dev/sda right??? When I try booting this: /dev/sda5 is mounted cleanly (is that the same thing as hd1,gpt5 ?) but I get an error message: /sbin/init does not exist. Bailing out, you are on your own. Good luck. And now I’m in a rootfs prompt. I’ll keep trying to figure out how to book the usb stick via grub…. On Jul 17, 2017, at 5:47 PM, Marius Bakke <mba...@fastmail.com<mailto:mba...@fastmail.com>> wrote: Joshua Branson <bran...@hotmail.com<mailto:bran...@hotmail.com>> writes: Hello, I’m currently trying to dual boot Arch Linux and GuixSD on a desktop machine that I built. GuixSD seems to be installing well, but grub in not properly installing. I’m trying to boot using grub-efi. After I run guix system init /mnt/etc/bare-bones.scm /mnt I get this error: grub-install: error: /gnu/store/ipwgwqaarp304r82…….-grub-efi-2.02/lib/grub/i386-pc/modinfo.sh doesn’t exist. Please specify —target or —directory. guix system: error: failed to install GRUB on device /dev/sda1 I believe that for some reason guixSD is install guix in a BIOS way. At least that’s what this ask ubuntu forum says: https://askubuntu.com/questions/763472/what-can-i-do-to-fix-this-error-on-grub-efi/763746 Apparently grub should be trying to install via X86_64…. Indeed. The error above indicates GRUB could not detect a UEFI system and falls back to BIOS (i386-pc), but can't find the required files. Now here’s detail about my set up. parted p /dev/sda1 500MB or so vfat partition. /dev/sda2 20 GB Arch root /dev/sda3 1GB swap /dev/sda4 /home for both Arch and GuixSD /dev/sda5 / for GuixSD. The partition table is using GPT. Looks good. Arch linux is already installed. It boots using UEFI, but Arch mounts /dev/sda1 to /boot. I booted guixSD via a usb-stick. I believe that I booted in BIOS mode. I was unable to get the usbstick to boot via UEFI. How old is your system, and in particular the mainboard? Do you know the brand/model? I wonder if this is one of those famous systems with 32-bit firmware and 64-bit CPU. Is the GuixSD install image detected if you disable legacy BIOS support altogether in your firmware? If not, can you test if the i686 installation image works?
