It seems that that module is built and installed into /lib/modules, but is not in the initramfs. Sounds like an initramfs-tools bug.
** Changed in: initramfs-tools (Ubuntu) Status: New => In Progress ** Changed in: initramfs-tools (Ubuntu) Importance: Undecided => High ** Changed in: initramfs-tools (Ubuntu) Assignee: (unassigned) => Andy Whitcroft (apw) ** Changed in: initramfs-tools (Ubuntu) Milestone: None => ubuntu-15.11 ** Changed in: lvm2 (Ubuntu) Status: New => Invalid ** Changed in: linux (Ubuntu) Status: Confirmed => Invalid ** Changed in: lvm2 (Ubuntu) Status: Invalid => In Progress ** Changed in: lvm2 (Ubuntu) Importance: Undecided => High ** Changed in: lvm2 (Ubuntu) Assignee: (unassigned) => Andy Whitcroft (apw) ** Changed in: lvm2 (Ubuntu) Milestone: None => ubuntu-15.11 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1509717 Title: Wily LVM-RAID1 – md: personality for level 1 is not loaded Status in initramfs-tools package in Ubuntu: In Progress Status in linux package in Ubuntu: Invalid Status in lvm2 package in Ubuntu: In Progress Bug description: After upgrading to Wily, raid1 LVs don't activate during the initrd phase. Since the root LV is also RAID1-mirrored, the system doesn't boot. I get the following message each time LVM tries to activate a raid1 LV: md: personality for level 1 is not loaded! Everything was fine with Vivid. I had to downgrade to Vivid kernel (3.19.0-30) to get my system to a usable state. I pretty much hope it to be a temporary workaround and I'll get the new 4.2.0 kernel work with Wily in days. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1509717/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp