Bug 1162904 - F21 ppc64 Beta RC1 - Netinst enters Grub rescue mode on G5 Mac [NEEDINFO]
Summary: F21 ppc64 Beta RC1 - Netinst enters Grub rescue mode on G5 Mac
Alias: None
Product: Fedora
Classification: Fedora
Component: lorax
Version: 21
Hardware: ppc64
OS: Linux
Target Milestone: ---
Assignee: Brian Lane
QA Contact: Fedora Extras Quality Assurance
: 1162914 (view as bug list)
Depends On:
Blocks: PPCTracker
TreeView+ depends on / blocked
Reported: 2014-11-12 00:31 UTC by Al Dunsmuir
Modified: 2015-12-02 16:31 UTC (History)
6 users (show)

Clone Of:
Last Closed: 2015-12-02 04:55:52 UTC
bcl: needinfo? (al.dunsmuir)

Attachments (Terms of Use)

Description Al Dunsmuir 2014-11-12 00:31:05 UTC
Description of problem:
On Mac G5s, all of the F21 netinst disks enter grub2's rescue mode instead of displaying the grub menu.

Version-Release number of selected component (if applicable):
PPC64 Beta RC1 and before

How reproducible:

Steps to Reproduce:
1. Start Mac G5 
2. Insert netinst CD
3. Hold down C to start "boot from CD" mode
4. Wait for CD to complete boot sequence

Actual results:

Entering rescue mode
grub rescue>

Expected results:

Display of grub2 menu, allowing install or rescue mode.

Additional info:
All F21 netinst CD isos behave the same.

F21 DVD is not recognized as bootable.  That's a separate issue.

Comment 1 Al Dunsmuir 2014-11-12 00:39:46 UTC
See https://bugzilla.redhat.com/show_bug.cgi?id=1020112

For F20, netinst CD had different issues
- CD boot/powerpc-ieee1275 directory was not blessed
- core.elf file in that director needed to be set to file type "tbxi"

I have followed the same procedure as Eric Larsson with the F21 Beta CD, but it made no difference.  HFS utilities don't appear to provide way to display if a directory is blessed, but did so.  Did verify that core.elf had correct file type.

It appears to be a new problem - perhaps a problem with grub2 not being able to access the grub.cfg file?   

I have plenty of Mac G5 hardware and fibre net connection so can easily do any testing for this.

Comment 2 Al Dunsmuir 2014-11-12 00:44:56 UTC
Blocking the ppc64 tracker bug.

Comment 3 Al Dunsmuir 2014-11-12 00:45:55 UTC
Sorry for the misfires on the blocker bug.

Comment 4 Al Dunsmuir 2014-11-12 01:30:00 UTC
Moving to lorax.

There is a separate issue that grub2 is being used for Mac stage 1 boot, but there is a dangling usage of yaboot for Mac stage 2 boot.  Unfortunately, yaboot is not provided on the F21 iso. 

I created the separate https://bugzilla.redhat.com/show_bug.cgi?id=1162914, to document this gap.   When creating that BZ, I noted that bcl is migrating RHEL 7.1 from yaboot to grub2 (https://bugzilla.redhat.com/show_bug.cgi?id=1131199)
under lorax.  I suspect that component may be a better starting point. 

Hopefully it will be possible to resolve the F21 grub2 stage 1 boot issues and do some quick resolution of the stage 2 yaboot issue (likely ppc64 -m32 build with static glib), to be migrated to grub2 stage 2 in F22 timeframe.  This would allow grub2-only boots in F22 and RHEL 7.1 releases.

Comment 5 Brian Lane 2014-11-13 00:42:56 UTC
We're not going to pull yaboot back in. And AFAIK the current setup works fine on power7 ppc64 systems.

I don't think G5 is really a high priority at this point, but can you be more specific about why you think it is failing on the G5?

Comment 6 Brian Lane 2014-11-13 00:45:46 UTC
*** Bug 1162914 has been marked as a duplicate of this bug. ***

Comment 7 Fedora End Of Life 2015-11-04 14:51:52 UTC
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Comment 8 Fedora End Of Life 2015-12-02 04:56:00 UTC
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