I think this happens because the lvm2 commands are called from inside
udev, while lvm itself also waits for udev to complete. This creates an
obvious deadlock.
/lib/udev/rules.d/85-lvm2.rules should be changed to read:
SUBSYSTEM=="block", ACTION=="add|change", ENV{ID_FS_TYPE}=="lvm*|LVM*", \
RUN+="watershed sh -c '/sbin/lvm vgscan --noudevsync; /sbin/lvm
vgchange --noudevsync -a y'"
cheers
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https://bugs.launchpad.net/bugs/802626
Title:
vgchange may deadlock in initramfs when VG present that's not used for
rootfs
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