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[Bug 807161] Re: [Dell Latitude 2110] Display sluggish, black background and repeated windows drawn when external monitor is connected

 

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** Description changed:

+ This is on a freshly installed and dist-upgraded Natty installation.
+ 
+ Steps to reproduce:
+ - Plug in an external screen and wait a couple of seconds for it to get recognized.
+ 
+ Expected result:
+ - Both screens draw correctly and can be used
+ 
+ Actual result:
+ - The background goes "black" on both screens (whereas it should have the default Ubuntu colored background). Unity and the top panel are visible on the built-in display; Only the top panel is visible in the external display.
+ 
+ If I open a terminal on the main display, it appears fine, but response
+ is very sluggish; the system takes up to 2 seconds to "catch up" with
+ actions, keystrokes and dragging actions (the cursor pointer itself is
+ fine and tracks movement without any lag).
+ 
+ If I drag a window around, other than it being very slow (takes up to 2
+ seconds to finally catch up with the dragging pointer), it leaves
+ "traces" of itself around, as if the intermediate steps were not being
+ erased before redrawing the window in a new position. This happens in
+ either display.
+ 
+ When I unplug the external display, everything goes back to normal.
+ 
+ I'm attaching pictures of the internal and external screen upon
+ connecting the external display, of both screens after I've dragged a
+ window around a bit and left a lot of residual window pieces, and how
+ the internal display looks after unplugging the external display (i.e.
+ normal).
+ 
  Happens on these four systems:
  - Three Dell Latitude 2110, slightly different specs
  - One Dell Inspiron Mini 1018
  
- ProblemType: Bug
- DistroRelease: Ubuntu 11.04
+ The common component seems to be this one:
+ 
+ Intel Corporation N10 Family Integrated Graphics Controller
+ 
+ 
+ ProblemType: BugDistroRelease: Ubuntu 11.04
  Package: xorg 1:7.6+4ubuntu3.1
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic i686
  Architecture: i386
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  Date: Thu Jul  7 14:47:06 2011
- DistUpgraded: Fresh install
- DistroCodename: natty
+ DistUpgraded: Fresh installDistroCodename: natty
  DistroVariant: ubuntu
  GraphicsCard:
-  Intel Corporation N10 Family Integrated Graphics Controller [8086:a011] (prog-if 00 [VGA controller])
-    Subsystem: Dell Device [1028:0461]
-    Subsystem: Dell Device [1028:0461]
- InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
+  Intel Corporation N10 Family Integrated Graphics Controller [8086:a011] (prog-if 00 [VGA controller])
+    Subsystem: Dell Device [1028:0461]
+    Subsystem: Dell Device [1028:0461]InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
  MachineType: Dell Inc. Latitude 2110
  ProcEnviron:
-  LANGUAGE=en_US:en
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=en_US:en
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=4ae16a11-2a60-4714-9532-620f4a0c685b ro quiet splash initcall_debug vt.handoff=7
- Renderer: Unknown
- SourcePackage: xorg
+ Renderer: UnknownSourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/25/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: X06
  dmi.board.name: MOE3C3
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrX06:bd01/25/2010:svnDellInc.:pnLatitude2110:pvr:rvnDellInc.:rnMOE3C3:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Latitude 2110
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
  version.libdrm2: libdrm2 2.4.23-1ubuntu6
  version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
  version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

** Attachment added: "1-internal-with-external-screen-connected.jpg"
   https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/807161/+attachment/2196102/+files/1-internal-with-external-screen-connected.jpg

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Title:
  [Dell Latitude 2110] Display sluggish, black background and repeated
  windows drawn when external monitor is connected

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