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Re: grub update and reinstallation

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Folk are onto this: the Buster point release is happening right now. People
are aware: the issue is also being raised in debian-cd. There are
workarounds - it will be sorted.

On Sat, Aug 1, 2020 at 5:20 PM Graham Seaman <graham@theseamans.net> wrote:

>
>
> On 01/08/2020 14:00, Sven Joachim wrote:
> > On 2020-08-01 12:23 +0100, Graham Seaman wrote:
> >
> >> On 01/08/2020 07:50, Tom Dial wrote:
> >>> I have a laptop that became unbootable because
> >>> the initial loader failed to find a symbol (grub_calloc) and balked.
> >>> Like the one mentioned here, it uses legacy boot. One explanation has
> it
> >>> that this happened because the MBR and the remainder of grub were not
> >>> both updated or were updated with slightly incompatible data.
> >>>
> >>> One fix appears to be to reinstall grub using a rescue CD or another
> >>> system. That worked for me.
> >>
> >> My home server sits in my loft managing comms with the outside world;
> >> yesterday it overheated (not a surprise) and went down.
> >
> > You should probably open the machine up and clean it. :-)
>
> The outdoor temperature was 38 centigrade; in my loft it was
> considerably more. The machine is spotless :-)
>
> >
> >> On reboot
> >> after cooling it came back up with the grub_calloc problem, so like
> >> Tom I reinstalled after which it appears to be OK.
> >>
> >> BUT because I have no idea why the original problem occurred, or why a
> >> reinstall fixed the problem, I have no idea if this is a permanent
> >> fix, or if I have a system which is liable to fail to reboot again in
> >> the future. Does anyone know? It's a very simple single drive system
> >> with legacy boot.
> >
> > In this case the error is quite unlikely to occur, I have no idea why it
> > happened for you in the first place.
> >
>
> It has happened to quite a range of users in the last week (search for
> 'grub calloc') - users running ubuntu, lubuntu, debian-mint, vanilla
> debian, that I've seen. So I assume its some upstream problem with grub.
> Some people seem to think the problem only shows on multi-boot-disk or
> raid systems, but that didn't apply in my case.
>
>
> >> I run it with security updates on auto, and check
> >> for other updates manually once a week or so. Should I change this
> >> pattern for a while while possible grub problems are sorted upstream?
> >
> > I would recommend to run "dpkg-reconfigure grub-pc".  This should bring
> > up three dialogues, the last of which asks for the disk(s) to install
> grub
> > on.  On your system this is most likely /dev/sda.
> >
>
> I already reinstalled grub-pc (using a rescue-usb) , that's how I got
> the system booting again. But I don't know if the current grub is
> trustable or not.
>
> Graham
>
>
> > Or get the device name from the debconf database:
> >
> > readlink -f $(debconf-show grub-pc 2>/dev/null | grep
> grub-pc/install_devices: | cut -d ':' -f2)
> >
> > Cheers,
> >        Sven
> >
>
>

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Thread

grub update and reinstallation Ross Boylan <rossboylan@stanfordalumni.org> - 2020-07-31 20:30 +0200
  Re: grub update and reinstallation Brian <ad44@cityscape.co.uk> - 2020-07-31 20:40 +0200
    Re: grub update and reinstallation Andrew Cater <amacater@gmail.com> - 2020-07-31 21:30 +0200
      Re: grub update and reinstallation Tom Dial <tddial@comcast.net> - 2020-08-01 09:10 +0200
        Re: grub update and reinstallation Graham Seaman <graham@theseamans.net> - 2020-08-01 13:30 +0200
          Re: grub update and reinstallation Sven Joachim <svenjoac@gmx.de> - 2020-08-01 15:10 +0200
            Re: grub update and reinstallation Graham Seaman <graham@theseamans.net> - 2020-08-01 19:30 +0200
              Re: grub update and reinstallation Andrew Cater <amacater@gmail.com> - 2020-08-01 22:00 +0200
              Re: grub update and reinstallation Tom Dial <tddial@comcast.net> - 2020-08-02 05:50 +0200
                Re: grub update and reinstallation Graham Seaman <graham@theseamans.net> - 2020-08-03 00:00 +0200
                Re: grub update and reinstallation Andrew Cater <amacater@gmail.com> - 2020-08-03 18:40 +0200
                Re: grub update and reinstallation Leslie Rhorer <lesrhorer@att.net> - 2020-08-03 23:50 +0200
          Re: grub update and reinstallation Tom Dial <tddial@comcast.net> - 2020-08-01 22:40 +0200
    Re: grub update and reinstallation Ross Boylan <rossboylan@stanfordalumni.org> - 2020-08-01 00:40 +0200

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