すみません、以下詳細です。
はじめはマウスカーソルの挙動に以上はありませんでした。

PC:
DELL XPS15
OS: Ubuntu 11.04 x86, Windows 7 x64
CPU: Intel Core i7 2630QM
RAM: DDR3-SDRAM 4GB
HDD: 640GB
GPU: Intel Integrated Graphics (CPU)
        NVIDIA GT540M

グラフィックスドライバ: i915
GT540MはOptimus Technologyでの切り替えがNVIDIA公式ドライバでサポートされていないので現時点では使えません。
プロプライエタリなドライバは使用していません。

ソフトウェア:
一部KDEのソフトをインストールしています。
ほか多数のソフトウェアをインストール済み。(apt-getやソースからコンパイルしたものなど)
gnome version 2.32.1

レポジトリ:
標準の物+
http://ppa.launchpad.net/mj-casalogic/bumblebee/ubuntu natty main
http://deb.playonlinux.com/ natty main

`lspci`
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation 2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 6 Series Chipset Family High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 1 (rev b5)
00:1c.1 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 2 (rev b5)
00:1c.3 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 4 (rev b5)
00:1c.4 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 5 (rev b5)
00:1c.5 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 6 (rev b5)
00:1d.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation HM67 Express Chipset Family LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 6 Series Chipset Family 6 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series Chipset Family SMBus Controller (rev 05)
01:00.0 VGA compatible controller: nVidia Corporation Device 0df4 (rev a1)
03:00.0 Network controller: Intel Corporation Centrino Wireless-N 1030 (rev 34)
04:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04)
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)

< /etc/X11/xorg.conf
Section "Device"
    Identifier    "Configured Video Device"
    Driver        "fbdev"
EndSection

Section "Monitor"
    Identifier    "Configured Monitor"
EndSection

Section "Screen"
    Identifier    "Default Screen"
    Monitor        "Configured Monitor"
    Device        "Configured Video Device"
EndSection