[Bug 434232] Re: cryptsetup prompt is overriden by upstart and xsplash in Karmic

[Saïvann Carignan]

AFAIK, The reason is that upstart never wait for a task to end before
starting another one, unless a task depend on the first task. No task
depends on cryptsetup and actually no task should depend on it. However,
many tasks depend on root filesystem and won't start until filesystem
gets available. That is why cryptsetup prompt only works when root
filesystem depends on cryptsetup.

Therefore the best way to handle this at the moment is really throught
initramfs as once the system starts to boot, cryptsetup can't have the
power to stop the computer from booting. If xsplash is about to have
that functionnality, a potential fix would be to ask the passphrase
through xsplash like it did in the past with usplash, at the exception
that xsplash would need to hide gdm or prevent the login screen to
appear until user answered the prompt.

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cryptsetup prompt is overriden by upstart and xsplash in Karmic
https://bugs.launchpad.net/bugs/434232
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