Hello.After recent minor package upgrade (I'm on sid) I found that the root filesystem is in 'RO' mode. I changed 'ro' into 'rw' in grub.conf and after reboot everything works fine. Any update which triggers update-grub causes 'ro' back.
I tried to find what's broke, but failed.I can't find who remounts root filesystem into rw mode. Is this some systemd generators magic? Or is this happens inside initrd?