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[Launchpad Bug Tracker <886646@xxxxxxxxxxxxxxxxxx>]

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I have been experiencing this bug since Natty, still present in Oneiric,
but only reporting it now, a co-worker of mine was able to reproduce it
as well.

On my Dell Latitude E6410, I move between work and home. In both
locations, I have an external DVI monitor configured to the left of my
primary monitor. Using xrandr or just the gnome displays tools, when I
disable the DVI monitor, the monitor disables, but the laptop screen
goes black. The mouse cursor is visible and I can use it to confirm that
the dimensions of the desktop match the laptop screen. If I use gnome
display, and let it time out after 30 seconds, it comes back. If I
immediately disable it a second time, it works and the laptop correctly
shows the desktop.

This happens with both of my external LCDs and is 100% reproducible.

1) boot with ext monitor
2) disable monitor (blank screen)
3) disable again, works
4) put laptop into standby
5) connect at work to LCD
6) disable LD, blank screen results
7) disable again, works 2nd time.

This is very frustrating, and if you use xrandr, where there is no 30
second delay you then have to go to a tty to restart unity to fix the
issue.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.24.0-0ubuntu2b1
ProcVersionSignature: Ubuntu 3.0.0-13.21-generic 3.0.6
Uname: Linux 3.0.0-13-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,grid,regex,compiztoolbox,snap,move,gnomecompat,imgpng,resize,animation,place,mousepoll,vpswitch,session,wall,workarounds,expo,fade,scale,unitymtgrabhandles,ezoom,unityshell]
CompositorRunning: compiz
Date: Sat Nov  5 13:30:30 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus: virtualbox, 4.1.2, 3.0.0-13-generic, x86_64: installed
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:040a]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: Dell Inc. Latitude E6410
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-13-generic root=UUID=b1f88d79-0996-40b4-b891-36ced922f7d5 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/08/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 0667CC
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA04:bd07/08/2010:svnDellInc.:pnLatitudeE6410:pvr0001:rvnDellInc.:rn0667CC:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E6410
dmi.product.version: 0001
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu5
version.ia32-libs: ia32-libs 20090808ubuntu26
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

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


** Tags: amd64 apport-bug compiz-0.9 oneiric running-unity ubuntu
-- 
Blank screen after disabling monitor in unity 3d
https://bugs.launchpad.net/bugs/886646
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