mouse cursor is gone,when I move it to screen top border

[hushishun]

ubuntu 15.04 vivid beta2.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-12.12-generic 3.19.3
Uname: Linux 3.19.0-12-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 346.59 Tue Mar 31 14:10:31 PDT 2015
 GCC version: gcc version 4.9.2 (Ubuntu 4.9.2-10ubuntu12)
ApportVersion: 2.17-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Apr 12 20:25:33 2015
DistUpgraded: Fresh install
DistroCodename: vivid
DistroVariant: ubuntu
DkmsStatus:
 bbswitch, 0.7, 3.19.0-12-generic, x86_64: installed
 nvidia-346, 346.59, 3.19.0-12-generic, x86_64: installed
 virtualbox, 4.3.26, 3.19.0-10-generic, x86_64: installed
 virtualbox, 4.3.26, 3.19.0-12-generic, x86_64: installed
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Samsung Electronics Co Ltd Device [144d:c606]
   Subsystem: Samsung Electronics Co Ltd Device [144d:c606]
InstallationDate: Installed on 2015-04-09 (2 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
JournalErrors: Error: command ['journalctl', '-b', '--priority', 'warning'] failed with exit code 1: No journal files were found.
MachineType: SAMSUNG ELECTRONICS CO., LTD. 300E4A/300E5A/300E7A/3430EA/3530EA
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-12-generic root=UUID=dc79c911-9c4c-4665-be52-7156bc71272a ro quiet splash
SourcePackage: xorg
Symptom: display
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/20/2012
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: 07QA
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 300E4A/300E5A/300E7A/3430EA/3530EA
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: FAB1
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr07QA:bd04/20/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn300E4A/300E5A/300E7A/3430EA/3530EA:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rn300E4A/300E5A/300E7A/3430EA/3530EA:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
dmi.product.name: 300E4A/300E5A/300E7A/3430EA/3530EA
dmi.product.version: 0.1
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
version.compiz: compiz 1:0.9.12.1+15.04.20150330-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.60-2
version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
xserver.bootTime: Sun Apr 12 23:42:44 2015
xserver.configfile: /etc/X11/xorg.conf
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 13897
 vendor SEC
xserver.version: 2:1.17.1-0ubuntu3

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[scottku (scottku)]

This also happens to me on a laptop with 15.04 installed on it. A quick test seems to indicate that it happens when I select the NVIDIA card from the nvidia-settings control panel. When I choose to use Intel integrated graphics, the mouse cursor works as expected.

[scottku (scottku)]

It appears that this bug is a duplicate of:
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-346/+bug/1440012