Bug#1025477: grub2: Regression when updating from grub2 2.06-5 to 2.06-5 breaks GRUB_GFXMODE

[Konomi Kitten]

Source: grub2
Version: 2.06-6
Severity: important
X-Debbugs-Cc: konomi...@gmail.com

Dear Maintainer,

I'm reporting against the source package because I am unsure which specific
package of grub2 has caused this bug.

After updating to version 2.06-6 my GRUB_GFXMODE line in /etc/default/grub no
longer works. I get the following two errors displayed when grub2 first starts:

Welcome to GRUB!

error: no server is specified.
error: no suitable video mode found.

After this I am greeted with an extremely low resolution grub screen but the
computer is still able to boot.

Downgrading the following packages fixes the issue:

Start-Date: 2022-12-05 22:52:19
Commandline: apt install ./grub2-common_2.06-5_amd64.deb ./grub-
common_2.06-5_amd64.deb ./grub-efi_2.06-5_amd64.deb ./grub-efi-
amd64_2.06-5_amd64.deb ./grub-efi-amd64-bin_2.06-5_amd64.deb ./grub-pc-
bin_2.06-5_amd64.deb
Requested-By: debian (1000)
Downgrade: grub-pc-bin:amd64 (2.06-6, 2.06-5), grub-efi-amd64:amd64 (2.06-6,
2.06-5), grub-efi-amd64-bin:amd64 (2.06-6, 2.06-5), grub2-common:amd64 (2.06-6,
2.06-5), grub-common:amd64 (2.06-6, 2.06-5), grub-efi:amd64 (2.06-6, 2.06-5)
End-Date: 2022-12-05 22:52:26


-- System Information:
Debian Release: bookworm/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.18.0-4-amd64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8), LANGUAGE=en_AU:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

[Konomi]

Could someone with access please rename this bug to "grub2: Regression
when updating from 2.06-5 to 2.06-6 breaks GRUB_GFXMODE" without the
line breaks. I am unable to do so because gmail in plain text mode
inserts line breaks and I can't figure out how to turn it off which
causes control to return an error message.

Thank you.

[Steve McIntyre]

On Mon, Dec 05, 2022 at 11:20:21PM +1100, Konomi Kitten wrote:
>Source: grub2
>Version: 2.06-6
>Severity: important
>X-Debbugs-Cc: konomi...@gmail.com
>
>Dear Maintainer,
>
>I'm reporting against the source package because I am unsure which specific
>package of grub2 has caused this bug.
>
>After updating to version 2.06-6 my GRUB_GFXMODE line in /etc/default/grub no
>longer works. I get the following two errors displayed when grub2 first starts:
>
>Welcome to GRUB!
>
>error: no server is specified.
>error: no suitable video mode found.
>
>After this I am greeted with an extremely low resolution grub screen but the
>computer is still able to boot.

ACK, thanks for reporting. I made changes to font handling, and it
looks like this is unexpected fallout from that. I'm debugging now.

--
Steve McIntyre, Cambridge, UK. st...@einval.com
"Arguing that you don't care about the right to privacy because you have
nothing to hide is no different than saying you don't care about free
speech because you have nothing to say."
-- Edward Snowden