From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#29662: 'guix gc' as user makes system unbootable
Date: Mon, 18 Dec 2017 10:54:06 +0100
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	Castillo's message of "Sun, 17 Dec 2017 23:23:37 +0100")
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To: Martin Castillo <castilma@uni-bremen.de>
Cc: 29662@debbugs.gnu.org

Hi Martin,

Martin Castillo <castilma@uni-bremen.de> skribis:

> I had a similar situation today. guix gc removed the grub background png
> from the store. the one, that was used by /boot/grub/grub.cfg. the boot
> menu then had a black and blue background. rebuilding the configuration
> refetched the background image, but guix gc removed it again.

Normally the current =E2=80=98grub.cfg=E2=80=99 is a GC root, which prevent=
s the
background image and other items from being deleted:

--8<---------------cut here---------------start------------->8---
$ ls -l /var/guix/gcroots/bootcfg=20
lrwxrwxrwx 1 root root 52 Dec  7 23:21 /var/guix/gcroots/bootcfg -> /gnu/st=
ore/2bnr3z8q0rpvdc9zrshhyq4znx7jpzq6-grub.cfg
$ guix gc --references /var/guix/gcroots/bootcfg=20
/gnu/store/i3l4cv1mz30l4jafbghmbgmafc0xb38h-grub-image.png
/gnu/store/j5x3dfappv9fdp7h46kgm8wxjbcqv5r6-system
/gnu/store/qkhhqqkr0lkczwqwbp95gx4s8v0pjj41-raw-initrd
/gnu/store/xqfpwxbghvi3h85pfji6kdzw7db2sgxz-grub-2.02
/gnu/store/zi4awdcvrlj0fp74yb0y4ngah4qmcri0-linux-libre-4.14.4
$ sudo diff /var/guix/gcroots/bootcfg /boot/grub/grub.cfg=20
$ echo $?
0
--8<---------------cut here---------------end--------------->8---

Could you check if this is the case on your machine?

Thanks,
Ludo=E2=80=99.