Image on external monitor is broken when only the external monitor is enabled

[Adi Roiban]

Binary package hint: xserver-xorg-video-intel

I have this strange regression in Natty. Everything was fine in Maverick.

I have an intel core i3 CPU with the default video card.

I connect the external monitor using the D-SUB (VGA) connector.

First time when I have connected the external monitor, Ubuntu was trying to be smart and automatically enabled the external monitor and disabled the builtin monitor. The image on the external monitor was broken, flickering very hard and it was not possible to see anything on the screen.

I pressed the "external monitor" key from the keyboard and `Display properties" windows was opened with both monitors enabled. Now the image was stable on the external monitor.

I tried various configurations, it it looks like the image on the external monitor is only broken when the internal monitor is turned off.

Thanks,
Adi

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelModules: wl
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,gnomecompat,staticswitcher,imgpng,mousepoll,vpswitch,place,wall,move,snap,unitymtgrabhandles,session,regex,animation,resize,grid,workarounds,expo,fade,scale,unityshell]
CompositorRunning: None
DRM.card0.DP.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1366x768
 edid-base64: AP///////wAw5MQBAAAAAAATAQOAHRF4CtXVlllWjCcfUFQAAAABAQEBAQEBAQEBAQEBAQEBPhxWoFAAFjAwIDYAJqYQAAAbPhxWoFAAFjAwIDYAJqYQAAAbAAAA/gBNMjcxUIAxMzNXSDEKAAAAAAAAAAAAAAAAAAEBCiAgADk=
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: Off
 modes: 1680x1050 1280x1024 1280x1024 1440x900 1440x900 1280x960 1152x864 1024x768 1024x768 832x624 800x600 800x600 800x600 640x480 640x480 720x400
 edid-base64: AP///////wAebTZW/LwAAAURAQNqLx146tQlpFVJmycTUFSna4CVD5UAgYCBQHFPAQEBAQEBITmQMGIaJ0BosDYA2SgRAAAcAAAA/QA4SxxTDwAKICAgICAgAAAA/ABMMjI2V0EKICAgICAgAAAA/AAKICAgICAgICAgICAgAPM=
Date: Wed Apr 27 12:19:38 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus: bcmwl, 5.100.82.38+bdcom, 2.6.38-8-generic, i686: installed
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 12) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:0455]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
MachineType: Dell Inc. Inspiron N3010
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=57f7697a-1f41-45d3-b03a-cb4257e6694e ro quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/11/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 0M54MP
dmi.board.vendor: Dell Inc.
dmi.board.version: A04
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A04
dmi.modalias: dmi:bvnDellInc.:bvrA04:bd06/11/2010:svnDellInc.:pnInspironN3010:pvrA04:rvnDellInc.:rn0M54MP:rvrA04:cvnDellInc.:ct8:cvrA04:
dmi.product.name: Inspiron N3010
dmi.product.version: A04
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
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
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
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7