when using password encrypted root and swap partitions (where a prompt
is shown in initramfs stage), and the system kexecs as prepared by the
kdump utility (the way i have tested it is enabling kdump, going into
single-user mode and injecting a 'c' sysrq into /proc/sysrq-trigger),
the password prompt is not shown, and a partial kernel panic message
stays on the screen.

if one is aware that the passwords are due several seconds after the
kexec, the user can enter them blindly; then, the system starts up and
in the course of that makes the display usable again -- but unless
guessing luckily[1], it appears as if the combination of cryptsetup and
kdump were completely broken.


best regards
chrysn


[1] depending on the user's undstanding of the whole situation, it might
just as well be completely obvious, but i dare say that the average user
has slim chances of guessing what to do.