bugGNU GRUB - Bugs: bug #47374, GRUB hangs for 2-3 minutes...


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bug #47374: GRUB hangs for 2-3 minutes regularly w/ Libreboot 20150518 on Lenovo T400 w/ DVD drive

Submitter:  Bradley M. Kuhn <bkuhn>
Submitted:  Wed 09 Mar 2016 08:24:21 PM UTC
Category:  Booting Severity:  Major
Priority:  6 Item Group:  Hardware-specific
Status:  None Privacy:  Public
Assigned to:  None Originator Name:  Bradley M. Kuhn
Open/Closed:  Open Release:  other
Release:  Reproducibility:  Every Time
Planned Release:  2.02

Wed 09 Mar 2016 08:24:21 PM UTC, original submission:  

I have a stock Debian Jessie install with grub-pc 2.02~beta2-22+deb8u1
on a T400 with Libreboot 20150518 installed.

Boots fine if I just let it auto-boot and don't go to grub command line
(i.e., if it never tries to read/touch (achi1), which is the DVD drive).

If I hit 'c' and get the grub> prompt:

grub> ls

... works FINE, returning immediately if the DVD drive is not in the
ultrabay slot on the T400, but if I boot with the DVD drive in:

grub> ls
#  .... sits for 2-3 minutes

Then returns file listings as expected.

It's clearly related to (achi1), which is the DVD drive, because this:

grub> ls (ahci0,msdos2)/   # as an example

does not hang and returns expected rules.

But, do a:

grub> ls (ahci1)

and it hangs again for 2-3 minutes.

and returns:

error: AHCI transfer timed out.

During the hang, the HD light is illuminated but it never tries to
access the DVD drive.

Behavior is better if you put a DVD or CD into the drive.  The hang is
shorter, only about 30-60 seconds, and then things proceed normally.
You can even ls the files on the DVD or CD from the grub> prompt with:

grub> ls (ahci1)/

The "error: AHCI transfer timed out " never seems to appear when there's
a DVD in the drive.

Now, I read in this thread:

that it's probably a BIOS bug that causes this.  I'm all for blaming
proprietary BIOS for being broken.  But, in this case, I'm using
libreboot 20150208 so it's either a bug in libreboot, or a bug in GRUB.
The libreboot folks suspect it's a GRUB issue. :)

Bradley M. Kuhn <bkuhn>


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  • -email is unavailable- added by phcoder (Updated the item)
  • -email is unavailable- added by bkuhn (Submitted the item)

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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2016-10-11 phcoder Priority5 - Normal 6
    2016-03-15 phcoder Planned ReleaseNone 2.02

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