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Urgent Help Needed: Unable to login to encrypted LVM root ubuntu 12.04 [closed]

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http://stackoverflow.com – I have a ubuntu 12.04 64 bit system, where I have two sda partitions sda1 and sda5, sda1 is unencrypted ext2 boot partition and sda5 is lvm2 encrypted disk with root filesystem and home etc. Till yesterday I was able to login and was working fine. Today onwards I was not able to login(no typo mistake),login always fails. Passphrase and decrypt is going through, but login fails. It gives a message "/dev/mapper/sda5_crypt is inactive" while booting. But if I mount this disk using 12.04 live CD it works fine, after mounting the encrypted lvm partition, I did "chroot mount_point /bin/bash" and t (HowTos)