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[Hipolit Kwass <mgjk@xxxxx>]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1243431

Title:
  Ubuntu 13.10 64bit installer won't boot unless acpi=off on Dell
  Optiplex 745

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I am booting  live cd of Ubuntu 13.10 Desktop 64bit but it ends with kernel panic because of some issues with acpi. I tried the following:
   - when I provide parameter acpi=off it boots ok.
   - when I provide acpi=ht (or no parameter) it generates kernel panic (see the screenshot in attachment).

  Moreover I can run 32bit version of Mint 15 with no acpi issues which
  suggests that only 64bit version is affected.

  There is attachment with two subdirectories: one contains data from Ubuntu 13.10 64 bits livecd taken with acpi=off and the second taken from 32bit version Mint 15.
  --- 
  ApportVersion: 2.12.5-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     2843 F.... pulseaudio
  CasperVersion: 1.336ubuntu1
  DistroRelease: Ubuntu 13.10
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Dell Inc. OptiPlex 745
  MarkForUpload: True
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash --  acpi=off debian-installer/language=pl keyboard-configuration/layoutcode?=pl
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  RfKill:
   
  Tags:  saucy
  Uname: Linux 3.11.0-12-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 06/26/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.6.6
  dmi.board.name: 0TY565
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 6
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr2.6.6:bd06/26/2011:svnDellInc.:pnOptiPlex745:pvr:rvnDellInc.:rn0TY565:rvr:cvnDellInc.:ct6:cvr:
  dmi.product.name: OptiPlex 745
  dmi.sys.vendor: Dell Inc.

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