** Description changed:

  On my Asus Zenbook UX32V (Intel HD4000) I experience 16bit
  colours/banding on the internal LCD panel. The external monitor works
  fine (no banding is to be seen).
  
  This happens on at least:
  linux-image-3.5.0-19-generic
  linux-image-3.5.0-18-generic
  linux-image-3.5.0-17-generic
  
  and not on
  linux-image-3.5.0-10-generic
  
  Others were not tested as I reinstalled my system.
  
+ I experience the same behaviour when using the xorg-edgers repository.
+ 
  This issue might be related to
  https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1085166 in some way
  as they started occuring at the same time (This sounds vague, and it
  indeed is as I only noticed after doing some more kernel updates, so I
  am not sure where this issue came up)
  
  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: xorg 1:7.7+1ubuntu4
  ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7
  Uname: Linux 3.5.0-19-generic x86_64
  .tmp.unity.support.test.0:
-  
+ 
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  Date: Fri Nov 30 20:07:45 2012
  DistUpgraded: Fresh install
  DistroCodename: quantal
  DistroVariant: ubuntu
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes
  GraphicsCard:
-  Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] 
(rev 09) (prog-if 00 [VGA controller])
-    Subsystem: ASUSTeK Computer Inc. Device [1043:1507]
-    Subsystem: ASUSTeK Computer Inc. Device [1043:1507]
+  Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] 
(rev 09) (prog-if 00 [VGA controller])
+    Subsystem: ASUSTeK Computer Inc. Device [1043:1507]
+    Subsystem: ASUSTeK Computer Inc. Device [1043:1507]
  InstallationDate: Installed on 2012-11-30 (0 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: ASUSTeK COMPUTER INC. UX32VD
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic 
root=UUID=9db55df0-afc5-4902-9a70-935e603c1158 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/17/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: UX32VD.212
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: UX32VD
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrUX32VD.212:bd09/17/2012:svnASUSTeKCOMPUTERINC.:pnUX32VD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX32VD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: UX32VD
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.
  version.compiz: compiz 1:0.9.8.4+bzr3407-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.40+git20121123.171666e4-0ubuntu0ricotz2~quantal
  version.libgl1-mesa-dri: libgl1-mesa-dri 
9.1~git20121128.ffc318a9-0ubuntu0ricotz~quantal
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 
2:1.13.0.901+git20121123+server-1.13-branch.c0e68f8e-0ubuntu0ricotz~quantal
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:7.0.99+git20121126.60cd6cea-0ubuntu0sarvatt~quantal
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.20.14+git20121126.7a904ce8-0ubuntu0sarvatt~quantal
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.4+git20121126.3b33a0b4-0ubuntu0sarvatt~quantal

-- 
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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1085168

Title:
  16 Bit colours / Banding on Intel HD4000

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