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[Nekhelesh Ramananthan <krnekhelesh@xxxxxxxxx>]

FYI, I did look at https://bugs.launchpad.net/unity/+bug/1301125,
however in that bug the unity freeze occurs only after the system is
locked after idle time. In my case, the unity freeze after manually
suspending and then resuming from freeze after 10-15 minutes.

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https://bugs.launchpad.net/bugs/1307118

Title:
  Unity freezes on resuming from suspend

Status in Unity:
  New
Status in “unity” package in Ubuntu:
  New

Bug description:
  After suspending laptop (by closing the laptop screen) and then
  resuming, the screen is black and doesn't seem to take any keyboard or
  mouse input. As a result, the only way to fix the situation is to hard
  reboot the system.

  Steps to reproduce:
  1. Suspend laptop
  2. Wait for at least 10-15 minutes
  3. Try resuming

  What happens:
  Black screen with the mouse cursor visible. However the whole screen is frozen. No keyboard or mouse input is accepted. As a result, I cannot switch to any vt to reboot or restart the lightdm process

  What should happen:
  Unity lockscreen is shown where one can enter the password and return to the user session

  gnome-screensaver: 3.6.1-0ubuntu13 amd64 [Installed]

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: unity 7.2.0+14.04.20140411-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  .tmp.unity.support.test.0:

  ApportVersion: 2.14.1-0ubuntu2
  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: Sun Apr 13 13:56:56 2014
  DistUpgraded: 2014-02-27 11:46:48,360 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  GraphicsCard:
   Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:3801]
   NVIDIA Corporation GK107M [GeForce GT 755M] [10de:0fcd] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:3801]
  InstallationDate: Installed on 2013-09-18 (207 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130802)
  MachineType: LENOVO 20217
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=63532c2e-8584-466e-8215-2d6770489a00 ro quiet splash vt.handoff=7
  SourcePackage: unity
  UpgradeStatus: Upgraded to trusty on 2014-02-27 (45 days ago)
  dmi.bios.date: 06/04/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 74CN32WW(V2.02)
  dmi.board.asset.tag: YB00228460
  dmi.board.name: 20217
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900003WIN8 STD MLT
  dmi.chassis.asset.tag: YB00228460
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo IdeaPad Y510P
  dmi.modalias: dmi:bvnLENOVO:bvr74CN32WW(V2.02):bd06/04/2013:svnLENOVO:pn20217:pvrLenovoIdeaPadY510P:rvnLENOVO:rn20217:rvr31900003WIN8STDMLT:cvnLENOVO:ct10:cvrLenovoIdeaPadY510P:
  dmi.product.name: 20217
  dmi.product.version: Lenovo IdeaPad Y510P
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.11+14.04.20140409-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu4
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu4
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu7
  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: Sun Apr 13 13:51:07 2014
  xserver.configfile: default
  xserver.errors:
   Failed to load module "nvidia" (module does not exist, 0)
   Failed to load module "nvidia" (module does not exist, 0)
   NOUVEAU(G0): Failed to initialise context object: 2D_NVC0 (0)
   NOUVEAU(G0): Error initialising acceleration.  Falling back to NoAccel
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                 489
   vendor                                     LGD
  xserver.version: 2:1.15.0-1ubuntu7

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