With 2560x1440 resolution, the mouse pointer jumps to x=0 when reaching x=2048

After changing the screen resolution to 2560x1440, the visible mouse pointer jumps back to x=0 when reaching x=2048 and continues to x=2560-2048, while the real mouse pointer is at the correct position. I can reach objects on the desktop past x=2048, put the pointer appears at x-2048 for x > 2048.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: cedarview-graphics-drivers 20120717-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-31.50-generic-pae 3.2.28
Uname: Linux 3.2.0-31-generic-pae i686
ApportVersion: 2.0.1-0ubuntu13
Architecture: i386
Date: Tue Oct 2 16:28:12 2012
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: cedarview-graphics-drivers
UpgradeStatus: No upgrade log present (probably fresh install)