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[Yuv <1367064@xxxxxxxxxxxxxxxxxx>]

Short answer: sorry, Christopher, I cannot bissect on this machine.  I
have a couple of other machines that are misbehaving after the 14.04
"upgrade" and I will probably file a report against them, with the extra
steps.

Longer answer: This is a production critical machine (family storage).
When I did the "upgrade", I took a necessary risk, exported (ZFS) all
the storage pools, carefully disconnected all hard drives in the pool
from the machine, imported a non-critical pool into a working 14.04
machine and made sure 14.04 can mount the pool and access the datasets.
Then I went about installing and diagnosing 14.04 on this machine. After
determining that the NOMODESET workaround works, I reconnected all hard
drives, reimported all pools, and closed the box. I will not reopen the
box until the next scheduled hard disks replacement or until an accident
happens. I made a note in the server's logbook, so in case I reopen the
box I will make sure I have a spare harddrive and some time to test.

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https://bugs.launchpad.net/bugs/1367064

Title:
  [MSI A88XM-E45][A4-5300] 'buntu 14.04.1 constant reboot without
  nomodeset

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Machine was happy with Xubuntu 13.10, but the software has been
  discontinued and I was forced to upgrade. USB stick with 14.04.1 would
  reboot continuously. USB stick with 14.04.1 server installs
  flawlessly, but then the server itself reboots continuously.

  WORKAROUND: Boot into recovery mode (hidden grub option)
  * Drop to root shell
  * Mount disk for read/write
  * edit /etc/default/grub:  find the line starting with 'GRUB_CMDLINE_LINUX_DEFAULT=' and add the word nomodeset inside the quotes
  * run update-grub and reboot

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-35-generic 3.13.0-35.62
  ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
  Uname: Linux 3.13.0-35-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-35-generic.
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC1', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D0c', '/dev/snd/pcmC1D0p', '/dev/snd/pcmC1D2c', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D3p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
  Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
  Card1.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
  Card1.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
  CurrentDmesg:

  Date: Mon Sep  8 21:37:52 2014
  HibernationDevice: RESUME=UUID=c347e713-9e24-4ff4-aec8-45cc91763877
  InstallationDate: Installed on 2014-09-09 (0 days ago)
  InstallationMedia: Ubuntu-Server 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.3)
  IwConfig:
   eth0      no wireless extensions.

   eth1      no wireless extensions.

   lo        no wireless extensions.
  MachineType: MSI MS-7721
  ProcFB:

  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=42c89bfe-885c-4c79-bc38-c301f5f9545e ro iommu=soft nomodeset
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-35-generic N/A
   linux-backports-modules-3.13.0-35-generic  N/A
   linux-firmware                             1.127.5
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/18/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: V25.3
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: A88XM-E45 (MS-7721)
  dmi.board.vendor: MSI
  dmi.board.version: 5.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: MSI
  dmi.chassis.version: 5.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV25.3:bd03/18/2014:svnMSI:pnMS-7721:pvr5.0:rvnMSI:rnA88XM-E45(MS-7721):rvr5.0:cvnMSI:ct3:cvr5.0:
  dmi.product.name: MS-7721
  dmi.product.version: 5.0
  dmi.sys.vendor: MSI

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