[Bug 1314929] Re: Clean install of 14.04 failing in last stages.

[James Perreault]

I had a similar issue.  Just bought a new MoBo, processor and ram.   GA-
990FXA-UD5, AMD FX8350 and 8 GB Kingston Hyper Beast DDR3 2400 Ram.
After Adjusting the RAM voltage to 1.65 Volts I installed an old HDD I
had  from a previous build.  It was used on an old Intel P4 32 Bit Dual
core MoBo.  Dual boot with dual drives.  XP on one drive  and Ubuntu
14.04 -  32 bit on the other.  When booting off the Ubuntu 32 bit drive
everthing was fine.  Windows XP of course flipped out and crashed.  (Not
unexpected).  Now I have a 8 Core 64 Bit processor running a 32 Bit OS.
Obviously this was a little disappointing. When I tried to boot Ubuntu
14.04 - 64 Bit version, well  that's when life got interesting.  It
would boot sometime but always lost USB and LAN ports..

Since windows was toast anyhow I wiped it an loaded Ubuntu 64 Bit on another system to get it installed.  Now I have 2 identical drive, one with Ubuntu 32 Bit OS and the Other with the 64 Bit version.   The 32 Bit version worked fine, but everytime I tried 64 Bit OS - no joy.  I stubled another post with a similar issue and found a solution that worked.  In the BIOS there is a default for IOMMU (Disabled),  when I enabled the IOMMU suddenly the 64 Bit OS worked.  USB 3.0, Gigabit LAN.  Life is good again.  Now back to the drawing board to see if I can stripe the drives since both drive are older and slower.  See if I can squeeze a little more speed out of them.   I hope this helps. 
James.

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https://bugs.launchpad.net/bugs/1314929

Title:
  Clean install of 14.04 failing in last stages.

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  Gigabyte GA-990FXA-UD5 and pair of Kingston HyperX 3k 120GB SSDs in RAID 0.
  Default/vanilla all the way.
  Internet connection via WiFi.
  Language packs downloaded OK, then crashes in last stages.
  Thought I saw the text "wifi" in the little text pane before crash.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubiquity 2.18.7
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.340
  Date: Thu May  1 07:40:16 2014
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --
  LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  ProcEnviron:
   LANGUAGE=en_GB.UTF-8
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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