Simon Matter said... "And when you downgrade lvm2, does it work again?" Thanks for the reply Simon. Found this great doc here : https://access.redhat.com/solutions/57300 So I added the following filter to /etc/lvm/lvm.conf to exclude non-block-devices from the scan... # grep ^filter /etc/lvm/lvm.conf filter = [ "a|/dev/sda.*|", "a|/dev/sdb.*|", "r|/dev/sdc.*|", "r|/dev/sdd.*|", "r|/dev/sde.*|" ] ( essentially sda / sdb are the two SSD in my system under LVM control...the rest are USB devices ) And now the LV commands complete...so dracut completes...and I can boot into the new kernel !! Thanks for your help.