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I'm running ubuntu 14.04 on a dell n7110.
The laptop has hybrid graphics: an intel (sandybrindge) and an nvidia (525m), which is optimus powered.
The built-in screen is wired to the intel card, while the HDMI port is rigged to the nvidia card.
I have nvidia-prime installed, this is in the nvidia-mode.
If logged in with default settings (HDMI being right-of built-in screen everything works fine.
Then all hell breaks loose when trying to switch them, so the HDMI display is on the left.

Two problems occur:
The panning on the HDMI display is set to the size of the whole desktop, so when I try to move my mouse to the right of the screen (onto the built-in display) the screen on the HDMI display follows the mouse cursor, scrolling, rendering half the desktop invisible.

The second problem is when I try to maximize a window on the HDMI
display. It acts like only the left of the screen (so an area like
300x1080px) is the whole display. Oddly the width of the display seems
to be about the same as the height difference between the heigth of the
two displays. If i set the top of the built-in display to be at the
half-height of the HDMI display, then the full screen width increases.
Note, that i can drag and move around my windows, but i can only resize
(by dragging the side with the mouse) them in the invalid full screen
area.

I hope my description will be clear enough, if not I'll post pictures,
or something.

These problems occur with kde, too.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Ez egy könyvtár: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  331.38  Wed Jan  8 19:32:30 PST 2014
 GCC version:  gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Thu Jul  3 00:33:24 2014
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:04c4]
 NVIDIA Corporation GF108M [GeForce GT 525M] [10de:0df5] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:04c4]
InstallationDate: Installed on 2014-03-11 (113 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140311)
MachineType: Dell Inc. Dell System Inspiron N7110
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic root=UUID=593e7c04-9f36-41cc-81c3-eb2f17c382ac ro quiet acpi_backlight=vendor splash
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/05/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A13
dmi.board.name: 09G8VY
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA13:bd09/05/2012:svnDellInc.:pnDellSystemInspironN7110:pvr:rvnDellInc.:rn09G8VY:rvr:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System Inspiron N7110
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.11.1+14.04.20140701-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Thu Jul  3 00:28:32 2014
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                 737 
 vendor                                     LGD
xserver.version: 2:1.15.1-0ubuntu2

** Affects: nvidia-graphics-drivers-331 (Ubuntu)
     Importance: Low
         Status: New


** Tags: amd64 apport-bug compiz-0.9 latest-bios-a13 trusty ubuntu
-- 
Panning and full screen window size broken when using HDMI port
https://bugs.launchpad.net/bugs/1336994
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