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[Bug 1382789] [NEW] If I plug a second monitor into my laptop while its sleeping, and then wake it up, the lock screen freezes

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Public bug reported:

I find sometimes that if I plug in my monitor into my laptop (via an
HDMI port, and and then HDMI to DVI connector) the monitor doesn't seem
to be recognized by ubuntu and no image displays on it. I have gotten
around this issue by having my laptop go to sleep and then plugging it
in then, at which point I could wake it up and things would generally
work. It seems lately though that the lock screen is just frozen upon
waking up (though not always, I can't seem to notice any pattern or
triggers), and therefore I usually have to restart X.

What I expect to happen is to be able to plug in my secondary monitor at
any point, at the lock screen, when at the desktop, or when the laptop
is closed or asleep, and then just have it recgonized and work without
needing to reboot or restart the display server.

Description:	Ubuntu 14.04.1 LTS
Release:	14.04

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
Uname: Linux 3.14.1-031401-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Sat Oct 18 11:38:24 2014
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:05fa]
InstallationDate: Installed on 2014-04-28 (172 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. Inspiron 7537
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.14.1-031401-generic root=UUID=815b9800-4a18-417a-b15a-1bac42f91bfe ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/18/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A10
dmi.board.name: 07PF9F
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA10:bd07/18/2014:svnDellInc.:pnInspiron7537:pvr:rvnDellInc.:rn07PF9F:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Inspiron 7537
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Sat Oct 18 11:25:04 2014
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                               30916 
 vendor                                     BNQ
xserver.version: 2:1.15.1-0ubuntu2.1

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 trusty ubuntu

-- 
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Packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1382789

Title:
  If I plug a second monitor into my laptop while its sleeping, and then
  wake it up, the lock screen freezes

Status in “xorg” package in Ubuntu:
  New

Bug description:
  I find sometimes that if I plug in my monitor into my laptop (via an
  HDMI port, and and then HDMI to DVI connector) the monitor doesn't
  seem to be recognized by ubuntu and no image displays on it. I have
  gotten around this issue by having my laptop go to sleep and then
  plugging it in then, at which point I could wake it up and things
  would generally work. It seems lately though that the lock screen is
  just frozen upon waking up (though not always, I can't seem to notice
  any pattern or triggers), and therefore I usually have to restart X.

  What I expect to happen is to be able to plug in my secondary monitor
  at any point, at the lock screen, when at the desktop, or when the
  laptop is closed or asleep, and then just have it recgonized and work
  without needing to reboot or restart the display server.

  Description:	Ubuntu 14.04.1 LTS
  Release:	14.04

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  Uname: Linux 3.14.1-031401-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Sat Oct 18 11:38:24 2014
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:05fa]
  InstallationDate: Installed on 2014-04-28 (172 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Dell Inc. Inspiron 7537
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.14.1-031401-generic root=UUID=815b9800-4a18-417a-b15a-1bac42f91bfe ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/18/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A10
  dmi.board.name: 07PF9F
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA10:bd07/18/2014:svnDellInc.:pnInspiron7537:pvr:rvnDellInc.:rn07PF9F:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Inspiron 7537
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Sat Oct 18 11:25:04 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               30916 
   vendor                                     BNQ
  xserver.version: 2:1.15.1-0ubuntu2.1

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