Re: PowerMac G5 fans run out of control with kernel4.17.0-3-powerpc64 but not with 4.16.0-1-powerpc64
On Sun, Aug 26, 2018 at 2:15 PM Linux User #330250
<linuxuser330250@gmx.net> wrote:
>
> Am 26.08.18 um 14:07 schrieb Frank Scheiner:
> > On 08/26/2018 01:35 PM, Linux User #330250 wrote:
> >> Am 26.08.18 um 12:48 schrieb John Paul Adrian Glaubitz:
> >>> One of the most pressing problems on Debian powerpc/ppc64 is
> >>> the deprecation of Yaboot. Yaboot is completely unmaintained these
> >>> days and should
> >>> have been replaced with GRUB long time ago. If you install Debian
> >>> powerpc/ppc64 on
> >>> an IBM-based system (CHRP-IBM or whatever it's called), the
> >>> installer will actually
> >>> install GRUB. On Mac systems (NewWorld), it will install Yaboot with
> >>> the various
> >>> problems that people are experiencing.
> >>>
> >>> Getting GRUB work on PPC Macs requires an extra utility which is
> >>> currently part
> >>> of the Yaboot package so this needs some extra work. But we have
> >>> worked on this
> >>> in the past and we hope to get this finished soon. Then we have one
> >>> annoyance
> >>> less to worry about.
> >>
> >>
> >> What is this tool that is missing?
> >
> > A working device-to-ofpath translator.
> >
> > AFAIR during testing in late 2017 the only tool that worked reliably
> > on most NewWorld PowerMac and Xserve machines was `ofpath` which is
> > part of the yaboot package as Adrian already mentioned. So not
> > maintained (because part of yaboot) and missing when yaboot is dropped.
> >
> > The other available tool `ofpathname` is meant for IBM machines and
> > gives wrong results on Apple machines (and also on IBM machines). The
> > tool `grub-ofpathname` from GRUB didn't work as expected during my
> > testing.
> >
> > See e.g. [1] for some background.
> >
> > [1]: https://lists.debian.org/debian-powerpc/2017/11/msg00086.html
> >
>
> Thanks, but why use ofpath when GRUB2 core.elf can figure that out all
> by itself without the use of open firmware stuff? Just use the UUID of
> the partition where the second main GRUB2 is installed, and use the
> first GRUB2 only as the first stage core.elf.
The actual bug was reported here:
https://bugs.debian.org/882076
The other grub-related powerpc issues can be found from:
https://udd.debian.org/cgi-bin/bts-usertags.cgi?tag=powerpc&user=debian-powerpc%40lists.debian.org
> Example: your /boot UUID is 12345678-abcd-ef01-1234-abcdef012345,
> grub.cfg on the HFS partition together with core.elf from GRUB2, blessed
> (:tbxi) using hattrib:
> > search --no-floppy --fs-uuid --set=root
> 12345678-abcd-ef01-1234-abcdef012345
> > set prefix=($root)/boot/grub
> > configfile /boot/grub/grub.cfg
>
> This will load grub.cfg from the real /boot partition and continue from
> there, no need to get the ofpath.
>
> At least that was how I did it on a Power Mac G4.
>
>
> Linux User #330250
>
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