I believe I'm seeing this as well, with a new install of Ubuntu 13.04.
I installed to a new LVM root on a machine, and on startup it can't find
the root partition to mount.
In the recovery shell, I could type "lvm vgchange -a y"
the udev rules aren't helping me, so I changed /usr/share/initramfs-
tools/scripts/init-premount/lvm2 to do a vgchange in addition to a
vgscan.
--- lvm2.orig 2013-06-04 08:12:12.826097349 -0500
+++ lvm2 2013-06-04 08:11:50.429987991 -0500
@@ -10,6 +10,8 @@
mountroot_fail()
{
+ /sbin/lvm vgscan >/dev/null 2>&1
+ /sbin/lvm vgchange -a y
if ! /sbin/lvm vgscan >/dev/null 2>&1 ; then
cat <<EOF
There appears to be one or more degraded LVM volumes, and your root device may
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https://bugs.launchpad.net/bugs/147216
Title:
LVM filesystems not mounted at boot
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