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** Attachment added: "ProcInterrupts.txt"
   https://bugs.launchpad.net/bugs/1376661/+attachment/4222277/+files/ProcInterrupts.txt

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https://bugs.launchpad.net/bugs/1376661

Title:
  Strange behaviour of ahci driver (intel 82801 Mobile SATA Controller)

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  I have a MSI GS60E Ghost Pro laptop. It is quite complex:

  2 SSD in raid 0  (intel Raid)
  1 HDD standard SATA
  2 Gpus (intel and nvidia)

  I was trying to upgrade my trusty to utopic.

  On trusty if I remember well there was no way to have a functionnal
  intel raid disks. I had to delete the raid an go to 2 separate disks
  to take advantage of the SSD (involved reinstalling secondary OS used
  for gaming).

  Legacy boot:
  On utopic, I can now use it  but the name of the device is still strange (don't know if it is expected, but on other scsi harware I had I always had standard names /dev/sdx...):

  /dev/mapper/isw_ihbcddegh_SSD, where SSD is the name given at raid
  creation of the volume.

  Despite of this device I still have access to bare device /dev/sda,
  /dev/sdb, with the added bonus of being able to destroy the raid on it
  if we let the default /dev/sda for grub install of utopic desktop
  (destroyed at the end of install).

  At install time we see /dev/mapper/isw_.... /dev/sda /dev/sdb and
  /dev/sdc, but it is readable on legacy installer even if not ideal.

  UEFI boot:
  If we boot on UEFI, it is more complex, as grub is not able to find the windows bootmanager for unknown reason (maybe not related).

  Don't know if I need to put it somewhere else, but at the install
  selection of disks and partitions, it is also a bit confusing as it
  show two devices for the raid /dev/mapper/isw_.... each with the copy
  of the partitions (split the raid) plus bare devices, /dev/sda,
  /dev/sdb. I don't remember, if I saw partitions on the bare devices
  equaly.

  I can make some undestructive tests for you (had hard time at making a
  working install on this machine). If really needed, I can switch to
  work on an other laptop, and go for destructive tests.

  You can find some hardware infos about the config there, setup, etc:

  http://paste.ubuntu.com/8478288/
  --- 
  ApportVersion: 2.14.7-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  kick       3322 F.... pulseaudio
   /dev/snd/controlC2:  kick       3322 F.... pulseaudio
   /dev/snd/controlC1:  kick       3322 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.10
  HibernationDevice: RESUME=UUID=46a8dc48-0696-4cc1-9ba5-6718ccae8802
  InstallationDate: Installed on 2014-10-01 (0 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140923)
  MachineType: Micro-Star International Co., Ltd. GS60 2PE
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-17-generic root=UUID=71fadb93-5ab3-4fab-98d7-e558816e33a0 ro quiet splash blacklist=nouveau
  ProcVersionSignature: Ubuntu 3.16.0-17.23-generic 3.16.3
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-17-generic N/A
   linux-backports-modules-3.16.0-17-generic  N/A
   linux-firmware                             1.134
  Tags:  utopic
  Uname: Linux 3.16.0-17-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 08/16/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: E16H2IMS.10B
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: MS-16H2
  dmi.board.vendor: Micro-Star International Co., Ltd.
  dmi.board.version: REV:0.B
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrE16H2IMS.10B:bd08/16/2014:svnMicro-StarInternationalCo.,Ltd.:pnGS602PE:pvrREV1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMS-16H2:rvrREV0.B:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: GS60 2PE
  dmi.product.version: REV:1.0
  dmi.sys.vendor: Micro-Star International Co., Ltd.

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