Thanks for your report. I think is not the same bug, cause in https://bugs.beta.launchpad.net/bugs/75681 there is no mdadm crash. You could have 2 problems, the problem with initramfs (the 75681 BUG) and other.
Best regards, neuromancer -- [apport] mdadm crashed with SIGSEGV https://launchpad.net/bugs/96543 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs