that feature was called inteli-hide and have been removed on purpose
there was a long discussion on unity-design mailing list about that. Its
not coming back. About the launcher appearing on all screen there was a
survey recently wheather to display launcher on single or all screens.
the results out of that survey will help in changing of the default
behavior.
In summary currently what you are seeing is all by design.
** Changed in: unity (Ubuntu)
Status: New => Opinion
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https://bugs.launchpad.net/bugs/944880
Title:
regression: docks on both screens, and they never autohide
Status in “unity” package in Ubuntu:
Opinion
Bug description:
After today's upgrades, rebooting and logging into my dual-headed
system, I'm noticing several regressions in Unity. First, I now see a
dock on both screens, even though they aren't mirrored.
Neither dock will autohide under any action I've tried, including when
full-screening an application window.
Normally full-screened windows such as Claws, Chromium, and Firefox
will not full-screen; they'll only maximize to right of the dock,
which does not autohide.
When moving say a Terminal window from the left screen to the right,
the window will interact with the right-screen's dock, offering to
full-height maximize it when the cursor hits the dock from the left
side.
When crossing from one screen to the other, the cursor sticks at the
mid-point, requiring extra "force" to continue its travel to the other
screen.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.4.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 1.93-0ubuntu2
Architecture: amd64
CompizPlugins:
[core,bailer,detection,composite,opengl,decor,vpswitch,mousepoll,imgpng,snap,resize,wall,compiztoolbox,grid,place,session,move,gnomecompat,resizeinfo,regex,unitymtgrabhandles,animation,expo,workarounds,ezoom,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
Date: Fri Mar 2 10:09:57 2012
DistUpgraded: Log time: 2011-12-23 12:59:21.323943
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
virtualbox, 4.1.8, 3.2.0-16-generic, x86_64: installed
virtualbox, 4.1.8, 3.2.0-17-generic, x86_64: installed
EcryptfsInUse: Yes
GraphicsCard:
Advanced Micro Devices [AMD] nee ATI RV730XT [Radeon HD 4670] [1002:9490]
(prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:2542]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110705.1)
MachineType: Dell Inc. Studio XPS 435MT
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic
root=UUID=7ffae0c6-66ea-4bbd-ae3d-f98ddd9603a5 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-02-27 (3 days ago)
dmi.bios.date: 05/05/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.1.1
dmi.board.name: 0R849J
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.1.1:bd05/05/2009:svnDellInc.:pnStudioXPS435MT:pvr:rvnDellInc.:rn0R849J:rvrA03:cvnDellInc.:ct3:cvr:
dmi.product.name: Studio XPS 435MT
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu5
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.1-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.1-0ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev
1:2.6.99.901+git20120126-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:0.0.16+git20111201+b5534a1-1build2
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