No raspberry-kernel in /etc/apt/apt.conf.d/01autoremove-kernels

[Oleg Davydov]

Upgrading package raspberry-kernel removes kernel modules, leading to corrupted (before next reboot) system.

Steps to reproduce:

1) Boot raspberry with old kernel. For me, it was raspberrypi-kernel 1.20170303-1
2) Upgrade raspberrypi-kernel package (I upgraded to 1.20170703-1).
3) Try to load some module. For me it was dm-mod, needed to work with luks-encrypted storage
$ modprobe dm_mod
modprobe: ERROR: ../libkmod/libkmod.c:557 kmod_search_moddep() could not open moddep file '/lib/modules/4.4.50-v7+/modules.dep.bin'

Workaround:
Just reboot system with new kernel.

Desired solution:
Add raspberrypi-kernel into /etc/apt/apt.conf.d/01autoremove-kernels like debian does with its kernels.
File /etc/apt/apt.conf.d/01autoremove-kernels is generated by /etc/kernel/postinst.d/apt-auto-removal (package apt). In my version (apt 1.0.9.8.4), it's line 44 of script
list="$(${DPKG} -l | awk '/^ii[ ]+(linux|kfreebsd|gnumach)-image-[0-9]+\./ && $2 !~ /-dbg$/ { print $2 }' | sed -e 's#\(linux\|kfreebsd\|gnumach\)-image-##')"

Seems that adding raspberry-kernel to theese two regexps may fix the problem.

[Oleg Davydov (burunduk3)]

May be problem is more complex because it's impossible to keep simultaneously installed different versions of raspberry-kernel.