#1144078 debian-installer: forky installer fails to install grub on disk with 20 partitions

#1144078#5
Date:
2026-08-10 19:42:47 UTC
From:
To:
Source: debian-installer
Version: 20260628
Severity: normal
Tags: d-i
X-Debbugs-Cc: debian-amd64@lists.debian.org, tjcw01@gmail.com, debian-boot@lists.debian.org
User: debian-amd64@lists.debian.org
Usertags: amd64
User: debian-boot@lists.debian.org
Usertags: amd64

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
I have a disk with about 20 partitions and about 10 varieties of Linux installed.
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
I attempted to install from the debian-testing netinst ISO (forky) on one of the partitions
   * What was the outcome of this action?
Installation proceeded normally until the installer tried to install grub; this failed and so left my system unbootable
   * What outcome did you expect instead?
Normal installation completion and a bootbale system

*** End of the template - remove these template lines ***

#1144078#10
Date:
2026-08-11 09:50:42 UTC
From:
To:
Control: tags -1 moreinfo
Did the installer boot in EFI or legacy mode ?
If legacy, which location did you select for GRUB ?
Did you check the detailed error messages in the installer logs (tty4 or
/var/log/syslog) ?

#1144078#17
Date:
2026-08-14 14:57:29 UTC
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To: