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[Launchpad Bug Tracker <1315286@xxxxxxxxxxxxxxxxxx>]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: xorg (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1315286

Title:
  Regression: screen corruption after update to trusty

Status in “xorg” package in Ubuntu:
  Confirmed

Bug description:
  Hi

  After upgrading, I am nolonger able to hotplug a 2nd screen to my
  laptop. The screen corrupts and I have to change to a terminal to do
  anything. This happens when the 2nd screen is on or off and unplugging
  the 2nd screen without shutting down. Booting with the 2nd screen
  attached does solve the issue. "sudo pkill Xorg" also solves it, but I
  loose my session.

  I've deleted ~/.config/monitors.xml, reconfigured Xorg an the Xorg
  intel driver, xrandr and a nomodeset option in grub ( creates a no 2nd
  screen connected).

  This morning I'm stuck on mirrored screens and any attempt to change
  it corrupts the display until I deleted .config/monitors.xml.

  Laptop: Samsung NP300E5C
  CPU: i5 - 3210m
  GPU: 3rd gen intel
  Ram: 12 GB
  drivers: libva- intel-vaapi-driver, xserver-xorg-video-intel

  Monitors:
  1. LG 21" LED on VGA - seen as a Goldstar 20"
  2 Sinotec 32" LCD on VGA and HDMI - seen as a 40"

  Reproduction: Easy plug/unplug a 2nd screen while in desktop or
  terminal(switching back to desktop).

  Will upload short videos of the LG when I get them of my phone.

  The bug was uploaded in terminal while tty7 was flashing away.

  I suspect that it's config cruft still on the laptop from saucy, like
  the rest of the clean-up I have been doing.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  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
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  Date: Fri May  2 08:57:19 2014
  DistUpgraded: 2014-04-23 21:08:41,382 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus: virtualbox, 4.3.10, 3.13.0-24-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Samsung Electronics Co Ltd Device [144d:c652]
  InstallationDate: Installed on 2013-03-30 (397 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 300E4C/300E5C/300E7C
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-24-generic root=/dev/mapper/ubuntu-root ro cryptopts=target=sda5_crypt,source=/dev/sda5,lvm=ubuntu-root quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: Upgraded to trusty on 2014-04-23 (8 days ago)
  dmi.bios.date: 10/15/2012
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: P04RAP
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: NP300E5C-A07ZA
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04RAP:bd10/15/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn300E4C/300E5C/300E7C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP300E5C-A07ZA:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 300E4C/300E5C/300E7C
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
  version.compiz: compiz 1:0.9.11+14.04.20140423-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Fri May  2 08:55:04 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                5539 
   vendor                                     CMO
  xserver.version: 2:1.15.1-0ubuntu2

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