bugGNU GRUB - Bugs: bug #37771, Assignment grub_mm_base = NULL...


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bug #37771: Assignment grub_mm_base = NULL causes boot failure on EFI

Submitted by:  Aaron Haviland <ah42>
Submitted on:  Mon 19 Nov 2012 02:00:36 AM UTC  
Category:  Booting Severity:  Major
Priority:  5 - Normal Item Group:  None
Status:  Invalid Privacy:  Public
Assigned to:  None Originator Name:  Aaron Haviland
Open/Closed:  Closed Release: 
Release:  Bazaar - trunk Reproducibility:  Every Time
Planned Release:  None

Fri 23 Nov 2012 04:41:57 AM UTC, comment #2:

You are correct; I was driven to the wrong place.

Feel free to mark this report invalid.

My issue appears to actually be at some point after grub_video_get_info_and_fini() and I am at a loss on how to debug this any further.

Aaron Haviland <ah42>
Tue 20 Nov 2012 08:25:34 PM UTC, comment #1:

No input is available between this line and until grub_mm_base is restored. So I suppose you were driven to a wrong place in the code.

Vladimir Serbinenko <phcoder>
Project Administrator
Mon 19 Nov 2012 02:00:36 AM UTC, original submission:

The statement in grub-core/lib/relocator.c:591:
grub_mm_base = NULL;
causes my system to lock-up when booting in EFI mode. I have determined this through liberal placement of grub_dprintf's, and eventually commenting out the offending line.

By commenting this line out, I am able to progress further in the boot sequence, but I am still unable to boot (have yet to determine that cause)

I haven't quite worked out why it only happens on EFI booting, since as far as I can tell, it's not in an EFI-specific code section.

Also reported on launchpad as LP #1080521

Aaron Haviland <ah42>


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