Package: grub2
Grub does not output to serial port when running in a VM launched using
Qemu when run as part of the Debian Installer. This prevents
installation of Debian in a VM when running without a GUI. In this
specific instance, I was trying to install Debian in a VM over ssh.
To reproduce the problem, run
$ qemu-system-x86_64 -cdrom debian-10.3.0-amd64-netinst.iso -nographic
The BIOS / Firmware outputs to the serial port but no further progress
is seen on the serial console. Dropping the `-nographic` shows that
Debian Installer is launched in a graphical window waiting for input.
Once installed without `-nographic`, the following changes to
/etc/default/grub and running `sudo update-grub` enabled serial output.
GRUB_TERMINAL=console
GRUB_SERIAL_COMMAND="serial --speed=11520 --unit=0 --word=8 --parity=no
--stop=1
The behaviour was seen on both Buster and Bullseye based Debian
Installer images on x86_64. It was also consistent for both legacy and
UEFI firmware.
Let me know if you need additional information.
Thanks.
