Issues booting PPC build on Alu G4

GenericBadName · n00b Joined: 12 Sep 2022 Posts: 2

Followed documentation here: https://wiki.gentoo.org/wiki/Handbook:PPC

Chose BTRFS as filesystem (owing to familiarity), compiled into kernel as default

When attempting to boot it returns: /pci@f4000000/ata-6@d/disk@0:4,/boot/kernel-5.15.59-gentoo: Unknown or corrupt filesystem

I've confirmed this looks correct in yaboot.conf, but I'm no expert with it (this is my first gentoo and first PPC build).

/boot isn't mounted (only contained within /dev/sda4 mounted as / ) so I think I'm supposed to reference it like that?

One thing is yabootconfig doesn't seem to be able to find kernel without me manually entering the path (which documentation implies shouldn't be necessary?).

GenericBadName · n00b Joined: 12 Sep 2022 Posts: 2

Gave up on yaboot, installed grub instead.

Now on grub loading I'm receiving "error: extent not found" when it attempts to load kernel. I've confirmed the filesystem is there, and tried editing to include rootfstype=btrfs but no luck yet.

Seems to be related to the fact that I'm using btrfs but there seems to be no guidance or recording of this particular error anywhere I look.

I would just restart installing using a less funky filesystem but it took 26 hours to emerge the @world set last time so I'd prefer not to. Any suggestions?"

immolo · Tux's lil' helper Joined: 11 Feb 2005 Posts: 122

I don't use BRTFS but I believe you need to follow this guide:

https://wiki.gentoo.org/wiki/Btrfs/Native_System_Root_Guide

Failing that if you haven't already changed it you could tar up your current install and switch to ext4

GreenNeonWhale · n00b Joined: 30 Mar 2016 Posts: 63

Hi,

I know that your post is a bit on the old side. I hope that you've already solved the problem.
Currently I have a PPC machine running Gentoo. I use yaboot to boot it. (Its a B&W G3)
I've always used a separate ext2 partition for /boot, and that's reliably worked for me. I haven't tried GRUB yet on PPC, so I can't help on that end.
If you haven't gotten it to work yet, I'd give yaboot another try with an ext2 /boot.
I might be able to help you with a yaboot setup. Post on this thread if you need/want more help. I'll check back from time to time.