Sorry, that should be "lv_deactivate". Here's my brain-dead work- around, just to help illustrate.
** Attachment added: "ugly workaround" http://librarian.launchpad.net/6439371/lvm-deactivate-sleep.diff -- [feisty] failures when opening snapshots https://launchpad.net/bugs/84672 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs