Ubuntu 15.04: Boot with systemd stops asking for cryptoswap password

[Linus van Pelt]

Ubuntu 15.04:
- booting with systemd stops asking for cryptoswap password
- booting stops; system don't boot
- boot process with upstart works

How can I fix the boot process?

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1450224/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Artem Melentyev (amelentev)]

After some time recovery shell is appeared.
Here you can type `exit` or ctrl-D and password prompt appears! type password and boot process continues.

Seems password entry program (plymouth) can't communicate with tty or whatever and exited by timeout on normal systemd boot.
There are some plymouth timeout in `journalctl -xb`

[Artem Melentyev (amelentev)]

I have mbr disk, no EFI, and text boot.