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[Launchpad Bug Tracker <1131176@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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https://bugs.launchpad.net/bugs/1131176

Title:
  disper -S put the system into unusable and unrecoverable state

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  I use an external monitor connected to my laptop and I use "disper -s" and "disper -S" all the time to switch between built-in and external monitor when I discronnect and reconnect the monitor.
  Frequently both of them randomly fail, but without major consequences.

  Now this time the following happened when I ran "disper -S" (after
  connecting the external monitor):

  - the built-in monitor switched off
  - the external monitor switched on but it was all black
  - hitting Esc, or Alt+Tab, or random keys, did nothing. No way I could see anything on screen
  - Ctrl+Alt+F1 would NOT shouw up a virtual terminal (it usually does, always on the built-in screen)
  - Unplugging and replugging the monitor did nothing

  So I had no choice but to force a power down, with disastrous data
  loss.

  
  Note that, whether or not there is a bug in disper triggering this, the OS has a huge bug if any buggy or even malicious program can under any circumstances make such a thing happen and there's no way to recover.

  I don't know whether the responsible is the kernel, xorg, or Unity.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-24-generic 3.5.0-24.37
  ProcVersionSignature: Ubuntu 3.5.0-24.37-generic 3.5.7.4
  Uname: Linux 3.5.0-24-generic i686
  NonfreeKernelModules: nvidia
  ApportVersion: 2.6.1-0ubuntu10
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  teo        2734 F.... pulseaudio
  Date: Thu Feb 21 12:53:47 2013
  HibernationDevice: RESUME=UUID=b1b3e5fe-38e2-44c9-9e48-4564cd9f4d66
  InstallationDate: Installed on 2010-06-23 (974 days ago)
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  MachineType: ASUSTeK Computer Inc. M51Sn
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-24-generic root=UUID=173acbf5-26a0-49e3-8d2b-f1c142582cbf ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-24-generic N/A
   linux-backports-modules-3.5.0-24-generic  N/A
   linux-firmware                            1.95
  SourcePackage: linux
  UpgradeStatus: Upgraded to quantal on 2013-01-13 (39 days ago)
  dmi.bios.date: 12/24/2007
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 303
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: M51Sn
  dmi.board.vendor: ASUSTeK Computer Inc.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK Computer Inc.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr303:bd12/24/2007:svnASUSTeKComputerInc.:pnM51Sn:pvr1.0:rvnASUSTeKComputerInc.:rnM51Sn:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
  dmi.product.name: M51Sn
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK Computer Inc.

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