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.