Comment 4 for bug 560717

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Steve Langasek (vorlon) wrote :

Documented at <https://wiki.ubuntu.com/LucidLynx/ReleaseNotes#Boot%20failures%20with%20LVM%20on%20ia64,%20powerpc,%20sparc>:

The linux kernel packages for the ia64, powerpc, and sparc architectures builds device-mapper support as a module, where the packages for the other architectures have the driver built in, which leads to boot failures on ia64/powerpc/sparc when using LVM. To work around this, users must run these commands manually from the initramfs:

modprobe dm_mod
lvm vgchange -a y

This issue will be addressed in a post-release kernel update. (560717)