Re: apt-get update and upgrade results in unbootable G5
Hi Dennis,
during the package upgrade of GRUB, `grub-install` uses `ofpathname` to
determine the OF path of the device that holds the GRUB files needed for
booting and uses `nvsetenv` to write it to the NVRAM. Unfortunately
`ofpathname` doesn't return a working OF path on Power Macs. To fix that
issue, please check [1]. You need to have `ofpath` available. If you
don't have the `yaboot` package installed, you need to get it from
snapshots.debian.org ([2]).
The basic process is to use an installer CDROM to boot into rescue mode,
chroot into your existing installation, [install yaboot package] and use
the commands from [1]:
```
# nvsetenv boot-device "$( ofpath /dev/<HFS_BOOTSTRAP_PARTITION> ),\grub"
```
...and reboot.
Cheers,
Frank
[1]: https://lists.debian.org/debian-powerpc/2019/04/msg00171.html
[2]:
http://snapshot.debian.org/archive/debian-ports/20190414T164455Z/pool-ppc64/main/y/yaboot/yaboot_1.3.17-4%2Bports1_ppc64.deb
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