Bug#689528: please add virtio support for cdrom at install time

[Witold Baryluk <witold.baryluk@gmail.com>]

Package: debian-installer
Followup-For: Bug #689528
X-Debbugs-Cc: witold.baryluk@gmail.com

Dear Maintainer,

I just tested daily snapshot installed for amd64 for trixie, and it
appears that some parts of this issue are fixed (I do not know when,
probably years ago).

For example

qemu-system-x86_64 -enable-kvm -cpu host -smp 4 -m 8G -drive file=${HOME}/debian-testing-amd64-netinst.iso,if=virtio,media=cdrom

works.

But a bit strange thing (not the end of the world tho), is that partman
also shows this read-only cdrom-class vda device in a selection menu
(and saying it is 816.8MB with no partitions, but this device does in
fact have 2 partitions. Size is correct, same as reported in dmesg, and
matching iso file size).


I still do have issue with other way:

-drive file=${HOME}/debian-testing-amd64-netinst.iso,if=none,id=drive-scsi1,media=cdrom,cache=none,aio=io_uring -device virtio-blk-pci,iothread=io1,id=scsihw0,drive=drive-scsi1,bootindex=1


I am able to use that form with custom live-cd of debian without issues.

But the current trixie netinst installer fails to recognize cdrom,
and does not even load virtio-blk module.

Loading this module manually, does not look to help.


Regards,
Witold


-- System Information:
Debian Release: 13.0
  APT prefers testing-security
  APT policy: (500, 'testing-security'), (500, 'testing-debug'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.16.0-rc4 (SMP w/32 CPU threads; PREEMPT)
Kernel taint flags: TAINT_CPU_OUT_OF_SPEC, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)