[Pkg-raspi-maintainers] Bug#848101: cmdline.txt and config.txt overwritten with each initramfs update

[Arjen Balfoort]

I'm currently building a RPi3 version of SolydX. For the Xfce desktop to 
successfully load I need to change the boot parameters.

cmdline.txt:
console=tty0 console=ttyS1,115200 root=/dev/mmcblk0p2 rw 
elevator=deadline fsck.repair=yes net.ifnames=0 rootwait cma=256M quiet 
splash loglevel=0 vt.global_cursor_default=0 plymouth.ignore-serial-consoles

config.txt:
arm_control=0x200
kernel=vmlinuz-4.14.0-3-arm64
initramfs initrd.img-4.14.0-3-arm64 followkernel
disable_splash=1
enable_uart=1
device_tree=bcm2837-rpi-3-b.dtb
gpu_mem=16
dtoverlay=pi3-disable-bt
dtparam=audio=on

Note: I needed the "cma=256M" in cmdline.txt. Any lower Xfce would 
freeze on login.

As the OP mentioned, these files are now overwritten with each initramfs 
update. I tried to create a hook script for initramfs-tools to restore 
backup files to cmdline.txt and config.txt but so far I didn't succeed 
in that.

In a desktop environment it regularly happens that initramfs is updated 
and overwriting these files always results in a frozen desktop and that 
is not something I can trust our users with.

Is there a way to prevent this behavior or does anybody know how to run 
a script after initramfs has been updated?