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Re: Debian 8 and Debian 9 Dual Boot

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From Dan Norton <dnorton@mindspring.com>
Newsgroups linux.debian.user
Subject Re: Debian 8 and Debian 9 Dual Boot
Date Sun, 24 Dec 2017 01:20:01 +0100
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On 12/23/2017 04:35 PM, Felix Miata wrote:

> Dan Norton composed on 2017-12-23 15:12 (UTC-0500):
>
>> Felix Miata wrote:
>>> [...]
>>> It's not so easy to figure out when POST is over with UEFI. Here, it seems
>>> efibootmgr -t provides extra delay beyond what the BIOS defines for you to make
>>> a selection from its own boot device selection menu, which requires an F12
>>> keystroke here to see.
>>> The timeout after appearance of Grub's menu is supposed to be controlled by
>>> /etc/default/grub's GRUB_TIMEOUT=, which shows up here in Stretch's grub.cfg
>>> first on line 86, a few lines before "### END /etc/grub.d/00_header ###".
>> Edited /etc/default/grub to change GRUB_TIMEOUT to 11:
>> root@BR914:/etc/default# nano grub
>> Observed "If you change this file, run 'update-grub' afterwards..." :
>> root@BR914:/etc/default# update-grub
>> Generating grub configuration file ...
>> Found background image: /usr/share/images/desktop-base/desktop-grub.png
>> Found linux image: /boot/vmlinuz-3.16.0-4-amd64
>> Found initrd image: /boot/initrd.img-3.16.0-4-amd64
>> Found Debian GNU/Linux (9.3) on /dev/mapper/vol2-root
>> Found Debian GNU/Linux (buster/sid) on /dev/mapper/vol3-root
>> done
>> Looking at /boot/grub/grub.cfg, timeout is mentioned as follows:
>> if [ "${recordfail}" = 1 ] ; then
>>     set timeout=-1
>> else
>>     if [ x$feature_timeout_style = xy ] ; then
>>       set timeout_style=menu
>>       set timeout=11
>>     # Fallback normal timeout code in case the timeout_style feature is
>>     # unavailable.
>>     else
>>       set timeout=11
>>     fi
>> fi
>> ...but there is no effect. The timeout when rebooting is still 3
>> seconds. I'm no shell expert so I don't know how to interpret the above.
> What exactly is on the screen during those 3 seconds?
>

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.

[...]

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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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