black screen on top of first monitor and all of second

[Scott Moser]

When I attach a second monitor, the only thing that displays on it is the panel. The rest of the screen is black.
Additionally, there is roughly 200 pixels of black on the first monitor.

This does not happen when I use the same settings under another window manager (tested sawfish).

I changed x resolution with xrandr of (doing so with gnome-display-properties shows same bug)
xrandr --output LVDS1 --auto --output HDMI2 --auto --right-of LVDS1

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.2.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.0.0-5.6-generic 3.0.0-rc7
Uname: Linux 3.0.0-5-generic x86_64
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
Date: Fri Jul 15 09:55:16 2011
DistUpgraded: Log time: 2010-11-15 15:19:11.183891
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 4.0.10, 3.0.0-5-generic, x86_64: installed
 virtualbox, 4.0.10, 3.0-2-generic, x86_64: installed
 virtualbox, 4.0.10, 3.0-3-generic, x86_64: installed
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:20e4]
   Subsystem: Lenovo Device [17aa:20e4]
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
MachineType: LENOVO 7417CTO
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-5-generic root=UUID=36286167-4eba-4a1e-a202-155c6baafa01 ro quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: unity
UpgradeStatus: Upgraded to oneiric on 2010-11-15 (241 days ago)
dmi.bios.date: 12/06/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 7UET91WW (3.21 )
dmi.board.name: 7417CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7UET91WW(3.21):bd12/06/2010:svnLENOVO:pn7417CTO:pvrThinkPadT400:rvnLENOVO:rn7417CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 7417CTO
dmi.product.version: ThinkPad T400
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu6
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11~1-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11~1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.0-3ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

[Scott Moser (smoser)]

Screenshot that shows the problem. I was surprised, but this actually shows the issue perfectly.
Note, the browser is cut off above the Ubuntu logo, and is not viewable at all on the second monitor (first is 1440 wide, the left).

[Scott Moser (smoser)]

One other thing to note, If i press the windows key, the launcher menu goes above the black area, but then will not go away.

[Ben Rousch (brousch)]

I have this same problem on a Dell Latitude D630 running Ubuntu 11.04.

Unity version: unity 3.8.16-0ubuntu1~natty1

Note that mirrored monitors or projectors work fine. I only have trouble when displays are not mirrored.

[Scott Moser (smoser)]

As requested by Jason, I logged out, logged back into "gnome" session (gnome shell) and I did not see the issue.

[Jean-Baptiste Lallement (jibel)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 810971, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.