On Thu, Sep 21, 2023 at 03:28:44PM +0200, Julian Andres Klode wrote: >Control: retitle -1 grub doesn't run os-prober by default anymore, so no more >other OS detected >Control: tag -1 wontfix > >On Fri, Jun 23, 2023 at 04:31:55PM -0400, bud wrote: >> Package: grub2 >> Severity: important >> File: grub2 >> X-Debbugs-Cc: [email protected] >> >> Dear Maintainer, >> >> * What led up to the situation? >> I installed the 2023-04-24 weekly build, downloaded the 2023-06-05 build and >> used that as the jigdo base to download bookworm 12.0.0 >> Then I added the 21 DVD images and synaptic suggested adding the online main >> repository. After apt-get update --allow-insecure-repositories, I rebooted. >> * What exactly did you do (or not do) that was effective (or >> ineffective)? >> The computer booted into bookworm. However, the existing option to boot >> Windows is no longer available. Looking in the Advanced options finds the >> prior Linux entry. >> >> Compare Bugs #1033985, #1008294 and #250626 >> >> * What was the outcome of this action? >> Without a Windows option, there is a suggestion in bug #1033985 that >> os-prober will help set me reset the grub list. Otherwise, the Windows DVD >> will contrarily erase grub. I only added a Linux partition to this laptop to >> investigate a HDMI bug, as this one has HDMI, VGA and DisplayPort connectors. >> * What outcome did you expect instead? >> Just because the Linux kernel has been updated, any existing entries should >> not be erased - except for the one being replaced. >> >> An update should not erase the settings the user or administrator has added >> to customize the system. This looks like a bug. > >The followup comment from Chris Carr made me understand that this seems >to be about the os-prober entries. For security reasons, os-prober is >no longer run when writing a new grub.cfg. > >You can either re-enable it and get exposed to any bug in grub >filesystem implementations which will then run as root to mount >any disk attached to the system, or add a /etc/grub.d file that >echos additional fixed boot entries for your other OS.
Or edit /etc/default/grub and change the GRUB_DISABLE_OS_PROBER setting there, then run "update-grub". It's up to you. -- Steve McIntyre, Cambridge, UK. [email protected] The two hard things in computing: * naming things * cache invalidation * off-by-one errors -- Stig Sandbeck Mathisen
