screen split in half when in unity and I plug in a external monitor

[Vangel Ajanovski]

Binary package hint: xorg

HP Pavilion dm4t-1100
I5 460M CPU
Intel + ATI 5470HD

When running under Unity and I plugin a second monitor the screen is split in half horizontally. The top part shows parts of windows, the bottom shows normal picture but what should be on the top. If using Gnome, everything is fine.

I have xrandr script like this:
#!/bin/sh
xrandr --output LVDS1 --off --output VGA1 --mode 1680x1050 --pos 0x0 --rotate normal

This works perfectly in Gnome, but in Unity it switches to 1027x768

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6~3ubuntu8
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1366x768 1366x768
 edid-base64: AP///////wAGrzwiAAAAAAAUAQSQHxF4Apf1m1lUjCUiUFQAAAABAQEBAQEBAQEBAQEBAQEBEhtWRlAAIzAmFjYANa0QAAAYDBJWRlAAIzAmFjYANa0QAAAYAAAAAAAAAAAAAAAAAAAAAAAAAAAAAgAMM/kKPGQfFCJuICAgAH0=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card1.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
DRM.card1.LVDS.2:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1366x768 1280x720 1152x768 1024x768 800x600 848x480 720x480 640x480
 edid-base64:
DRM.card1.VGA.2:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
Date: Tue Mar 1 01:22:02 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 5.100.82.38+bdcom, 2.6.38-5-generic, x86_64: installed
 bcmwl, 5.100.82.38+bdcom, 2.6.38-1-generic, x86_64: installed
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:1603]
 ATI Technologies Inc Manhattan [Mobility Radeon HD 5000 Series] [1002:68e0] (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:1603]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110202)
MachineType: Hewlett-Packard HP Pavilion dm4 Notebook PC
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-5-generic root=UUID=c0f3cbfa-472c-4519-a51f-00b3200315ed ro quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/21/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.23
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1603
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 58.27
dmi.chassis.asset.tag: CNU04620Q6
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.23:bd10/21/2010:svnHewlett-Packard:pnHPPaviliondm4NotebookPC:pvr058B110000242B10000020100:rvnHewlett-Packard:rn1603:rvr58.27:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion dm4 Notebook PC
dmi.product.version: 058B110000242B10000020100
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.4-0ubuntu2
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1~git20110215.cc1636b6-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu8
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu11
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu5

[Vangel Ajanovski (ajanovski)]

In fact, I was wrong. When using xrandr to switch to external screen, it is not wrong resolution, but the screen is split in half again only this time the upper part shows no garbage - only black background. The picture of the desktop is shown only in the lower left part of the screen is 1024x768 and it works OK without problems.

The mouse is able to move to the black parts on the top and right.

[Bryce Harrington (bryce)]

Yeah, I've reproduced this myself. It seems to not be X but rather the compiz/unity autoconfiguration logic for multi-head. I think it's a known issue. Bumping over to unity.