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Groups > linux.debian.user > #190425

Re: Debian 8 and Debian 9 Dual Boot

From Dan Norton <dnorton@mindspring.com>
Newsgroups linux.debian.user
Subject Re: Debian 8 and Debian 9 Dual Boot
Date 2017-12-28 21:00 +0100
Message-ID <v1Mvo-4PI-25@gated-at.bofh.it> (permalink)
References (11 earlier) <uZYqZ-3c8-1@gated-at.bofh.it> <uZZGp-3Ys-5@gated-at.bofh.it> <v02bf-5Is-3@gated-at.bofh.it> <v06eR-7H-1@gated-at.bofh.it> <v1CZ3-6CC-5@gated-at.bofh.it>
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On 12/28/2017 04:48 AM, Pascal Hambourg wrote:
> Le 24/12/2017 à 05:36, Felix Miata a écrit :
>> Dan Norton composed on 2017-12-23 19:15 (UTC-0500):
>>
>>> The menu inside the box is:
>>> Debian GNU/Linux
>>> Advanced options for Debian GNU/Linux
>>> Debian GNU/Linux 8 (jessie) (on /dev/mapper/vol1-root)
>>> Advanced options for Debian GNU/Linux 8 (jessie) (on 
>>> /dev/mapper/vol1-root)
>>> Debian GNU/Linux buster/sid (on /dev/mapper/vol3-root)
>>> Advanced options for Debian GNU/Linux buster/sid (on 
>>> /dev/mapper/vol3-root)
>>
>>> The first two boot stretch, so they will eventually have "9 (stretch)
>>> (on /dev/mapper/vol2-root)" appended, once the timeout is under 
>>> control.
>>
>> Based on what I see and what you say, it seems you are modifying the 
>> timeout for
>> Stretch (/etc/default/grub on vol2), but actually booting Stretch 
>> from Jessie's
>> grub.cfg (/etc/default/grub on vol1), which remains configured to 3 
>> seconds.
>
> Based on what I see and what Dan wrote, I'd rather say the other way 
> around : Dan edited /etc/default/grub in Jessie (update-grub showed 
> the system kernel was Jessie's 3.16 and found stretch/9.3 as a foreign 
> system) but the GRUB loading at boot time is the one from stretch (the 
> first entries boot stretch). So the time-out must be changed from 
> stretch.
>
> You can check the result of /etc/default/grub parameters in 
> /boot/grub/grub.cfg after running update-grub.
> You can also check GRUB variables at boot time in GRUB's shell (press 
> "c" to spawn the shell) with the command "set". It will also display 
> value of the "prefix" variable which contains the device and path to 
> the used /boot/grub directory.
>

We have a winner! Thanks Pascal.

I checked the GRUB variables for each installation: jessie, stretch, and 
buster. The prefix was identical for all - a hairy, hard to read, 
touch-typing exercise of the form:

lvmid/<VG UUID>/<LV UUID>

Of course, the UUIDs were immediately recognizable ;-) as belonging to 
volume group "vol2" and logical volume "root" where stretch was 
installed. I changed the time-out in /etc/default/grub and ran 
update-grub from stretch and it *changed* .

The old /etc/default/grub was like this (excluding comments):

GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
GRUB_CMDLINE_LINUX=""

...so the 3 seconds I was seeing was probably due to a run-off of the 5. 
Anyway, I changed 5 to 12 arbitrarily and that was effective.

Thank you, Pascal.

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Thread

Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 04:50 +0100
  Re: Debian 8 and Debian 9 Dual Boot David Christensen <dpchrist@holgerdanske.com> - 2017-11-13 07:20 +0100
    Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 16:30 +0100
      Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-13 20:10 +0100
        Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 21:10 +0100
        Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-14 00:10 +0100
          Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-14 01:50 +0100
            Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-14 03:40 +0100
              Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-14 04:00 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-14 04:50 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-16 19:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-16 20:10 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-16 23:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-16 20:30 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-16 21:20 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 19:10 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-29 19:20 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-29 19:50 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-29 19:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 21:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-29 22:00 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 22:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-30 03:20 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 22:10 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-29 23:10 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-17 00:00 +0100
              Re: Debian 8 and Debian 9 Dual Boot Jonathan Dowland <jmtd@debian.org> - 2017-11-29 10:10 +0100
      Re: Debian 8 and Debian 9 Dual Boot David Christensen <dpchrist@holgerdanske.com> - 2017-11-13 20:20 +0100
        Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-14 00:30 +0100
          Re: Debian 8 and Debian 9 Dual Boot David Christensen <dpchrist@holgerdanske.com> - 2017-11-14 00:40 +0100
  Re: Debian 8 and Debian 9 Dual Boot Jochen Spieker <ml@well-adjusted.de> - 2017-11-13 10:00 +0100
    Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 17:00 +0100
      Re: Debian 8 and Debian 9 Dual Boot Jochen Spieker <ml@well-adjusted.de> - 2017-11-13 21:30 +0100
  Re: Debian 8 and Debian 9 Dual Boot Roberto C. Sánchez <roberto@debian.org> - 2017-11-13 13:00 +0100
    Re: Debian 8 and Debian 9 Dual Boot Roberto C. Sánchez <roberto@debian.org> - 2017-11-13 17:10 +0100
      Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 18:10 +0100
    Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-13 17:10 +0100
      Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-13 20:00 +0100
        Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 04:20 +0100
          Re: Debian 8 and Debian 9 Dual Boot Michael Fothergill <michael.fothergill@gmail.com> - 2017-11-29 08:10 +0100
          Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-11-29 10:10 +0100
            Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-11-29 19:00 +0100
          Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-29 20:00 +0100
            Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-11-29 20:40 +0100
            Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-12-21 10:50 +0100
              Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-12-21 20:10 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-12-21 21:00 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-12-21 23:00 +0100
                Re: Debian 8 and Debian 9 Dual Boot Joe <joe@jretrading.com> - 2017-12-21 23:10 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-12-21 23:20 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-12-23 21:20 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-12-23 22:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-12-24 01:20 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-12-24 05:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-12-28 01:00 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-12-28 07:40 +0100
                Re: Debian 8 and Debian 9 Dual Boot Felix Miata <mrmazda@earthlink.net> - 2017-12-28 07:50 +0100
                Re: Debian 8 and Debian 9 Dual Boot Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-28 10:50 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-12-28 21:00 +0100
                Re: Debian 8 and Debian 9 Dual Boot Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-29 15:00 +0100
                Re: Debian 8 and Debian 9 Dual Boot Dan Norton <dnorton@mindspring.com> - 2017-12-29 23:50 +0100
                Re: Debian 8 and Debian 9 Dual Boot Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-30 00:40 +0100

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