devmapper kernel modules missing from precise server cd

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This is know to affect the Ubuntu Server Daily Build of Ubuntu 12.04, as of March 12, 2012.

The kernel modules for 'dm-mirror' and 'dm-raid' are missing, which prevent the installer's dmraid setup from starting for NVidia and Silicon Image ATA fakeraid controllers.

Compounding this issue, for upgrades of systems that are running lvm2 on top of dmraid mirrors, the lvm2 'vgchange -a y' *does* occur, which then leads the installer to perform the installation on only half of the drives in the raid set.

Curiously, at least on the Silicon Image firmware, this does not break the raid set and start a rebuild, but allows the raid to come up in a very strange, broken manner that rapidly leads to filesystem corruption, and an unusable installation.

Confirmed, the modules are missing from the server iso, but not desktop, as of April 2.

These need to be added to the md-modules udeb by the kernel packaging.

Andy, this looks like a straightforward packaging bug to fix - can we please have this fixed for the last package drop before kernel freeze?

I've added the dm-mirror and dm-raid modules to the md-modules d-i file. This fix won't likely make it in an upload prior to kernel freeze, but I'll make sure this fix is uploaded and available before final release for 12.04.

This bug was fixed in the package linux - 3.2.0-23.36

---------------
linux (3.2.0-23.36) precise-proposed; urgency=low

  [ Andy Whitcroft ]

  * tools/hv: add basic Makefile
    - LP: #977246
  * tools/hv: add basic manual pages
    - LP: #977246
  * Hyper-V KVP daemon -- add to the tools package
    - LP: #977246

  [ David Henningsson ]

  * SAUCE: (drop after 3.3) ALSA: HDA: Remove quirk for Gigabyte
    GA-H61M-S2PV
    - LP: #948360

  [ Leann Ogasawara ]

  * d-i: Add dm-mirror and dm-raid to md-modules
    - LP: #919281

  [ Tim Gardner ]

  * [Config] Fix invalid linux-headers link
    - LP: #974403
  * Remove headers asm symlink entirely
    - LP: #974403

  [ Upstream Kernel Changes ]

  * Revert "x86/ioapic: Add register level checks to detect bogus io-apic
    entries"
    - LP: #974982
  * ALSA: HDA: Realtek: Take vmaster dac from multiout dac list
    - LP: #974090
  * kexec: remove KMSG_DUMP_KEXEC
    - LP: #944772
  * kmsg_dump: don't run on non-error paths by default
    - LP: #944772
  * pstore: Introduce get_reason_str() to pstore
    - LP: #944772
 -- Leann Ogasawara <email address hidden> Tue, 10 Apr 2012 08:16:09 -0700