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[Ben McCann <1210104@xxxxxxxxxxxxxxxxxx>]

I can't test 3.2.46 because there are no amd64 packages available in
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.2.46-precise. (There
were no Intel CPU packages at all). I did test 3.2.47 and 3.2.48 images
and *both* of them fail to detect my Intel fakeraid array.

I also looked into updating my BIOS, as suggested by penalvch, and I've
decided *not* to upgrade. Too many horror stories about broken systems
after doing the upgrade including really basic stuff like detecting
Nvidia video cards, overclock failures, higher CPU temps, etc.

I'm also concerned that a BIOS upgrade will wipe the Intel raid state
from the BIOS and hence force me to rebuild the array from scratch. I'd
rather not do that either.

-- 
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https://bugs.launchpad.net/bugs/1210104

Title:
  Intel FakeRAID *Regression* in Kubuntu 12.04 with Linux 3.2.0-51

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I have been using Intel FakeRAID on an Asus Z77 motherboard on Kubuntu
  12.04 for months. I'm using the MDADM version and not DMRAID. It has
  been working fine other than a couple minor issues with clean
  shutdowns that I fixed by tweaking a couple of the scripts under /etc.

  I upgraded to the latest Linux kernel (3.2.0-51) and my FakeRAID
  stopped working, probably because auto-detection failed to see the
  RAID array. Everything works fine with the previous kernel image,
  3.2.0-49.

  Here is /proc/mdstat with the 3.2.0-49 generic kernel image:

  Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10] 
  md126 : active raid1 sdb[1] sdc[0]
  976758784 blocks super external:/md127/0 [2/2] [UU]

  md127 : inactive sdb[1](S) sdc[0](S)
  6306 blocks super external:imsm

  The /proc/mdstat file is empty (other than listing personalities) in
  3.2.0-51. Note that the sdb and sdc drives are recognized by 3.2.0-51,
  and their partition tables look reasonable, so I don't see any issues
  with 3.2.0-51 actually seeing the physical drives. The problem appears
  to be that the MD driver doesn't detect the external RAID (aka 'imsm')
  metadata created by Intel fakeraid.

  Here's the additional data requested for new bug reports:

  lsb_release -rd
  Description:    Ubuntu 12.04.2 LTS
  Release:        12.04

  apt-cache policy linux-image-3.2.0-51-generic
  linux-image-3.2.0-51-generic:
    Installed: 3.2.0-51.77
    Candidate: 3.2.0-51.77
    Version table:
   *** 3.2.0-51.77 0
          500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
          500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
          100 /var/lib/dpkg/status

  FWIW, here's the apt-cache data on the previous kernel where fakeraid
  worked correctly:

  apt-cache policy linux-image-3.2.0-49-generic
  linux-image-3.2.0-49-generic:
    Installed: 3.2.0-49.75
    Candidate: 3.2.0-49.75
    Version table:
   *** 3.2.0-49.75 0
          500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
          100 /var/lib/dpkg/status

  I will attach the kernel.log for booting 3.2.0-49 and 3.2.0-51. I've
  looked at them and all I see is that 3.2.0-49 'binds' the RAID array
  components and 3.2.0-51 doesn't. Here's a snippet from 3.2.0-49 where
  it starts my RAID. This is absent in 3.2.0-51.

  Aug  6 06:53:46 canopus kernel: [    2.088509] md: bind<sdb>
  Aug  6 06:53:46 canopus kernel: [    2.150987] md: bind<sdc>
  Aug  6 06:53:46 canopus kernel: [    2.151022] md: bind<sdb>
  Aug  6 06:53:46 canopus kernel: [    2.151746] md: raid1 personality registered for level 1
  Aug  6 06:53:46 canopus kernel: [    2.152167] bio: create slab <bio-1> at 1
  Aug  6 06:53:46 canopus kernel: [    2.152239] md/raid1:md126: active with 2 out of 2 mirrors
  Aug  6 06:53:46 canopus kernel: [    2.152249] md126: detected capacity change from 0 to 1000200994816
  Aug  6 06:53:46 canopus kernel: [    2.153111]  md126: p1 p2 p3 p4 < p5 p6 p7 >

  Any suggestions on how to troubleshoot and/or fix this? There's no point bisecting the kernel images given the regression has just appeared in 3.2.0-51 and, AFAIK, there was never a release of a '3.2.0-50' kernel.
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu17.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  bmccann    2893 F.... pulseaudio
   /dev/snd/controlC0:  bmccann    2893 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf7430000 irq 51'
     Mixer name	: 'Realtek ALC892'
     Components	: 'HDA:10ec0892,104384fb,00100302'
     Controls      : 44
     Simple ctrls  : 21
  Card1.Amixer.info:
   Card hw:1 'NVidia'/'HDA NVidia at 0xf7080000 irq 17'
     Mixer name	: 'Nvidia GPU 41 HDMI/DP'
     Components	: 'HDA:10de0041,14622871,00100100'
     Controls      : 24
     Simple ctrls  : 4
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=ce0ec46d-5a8e-4ba4-9049-ed08a896696b
  InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120424)
  MachineType: System manufacturer System Product Name
  MarkForUpload: True
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/tcsh
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-49-generic root=UUID=90c7fb84-e571-4f25-b91a-0a8e9915763f ro quiet splash nomodeset vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-49.75-generic 3.2.46
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-49-generic N/A
   linux-backports-modules-3.2.0-49-generic  N/A
   linux-firmware                            1.79.6
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  StagingDrivers: mei
  Tags:  precise staging
  Uname: Linux 3.2.0-49-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserAsoundrc:
   # ALSA library configuration file
   
   # Include settings that are under the control of asoundconf(1).
   # (To disable these settings, comment out this line.)
   </home/bmccann/.asoundrc.asoundconf>
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  WifiSyslog:
   Aug  8 07:15:09 canopus NetworkManager[1547]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)
   Aug  8 07:20:08 canopus NetworkManager[1547]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)
  dmi.bios.date: 02/14/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0704
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P8Z77-V
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0704:bd02/14/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8Z77-V:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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