Mouse pointer randomly stops appearing on one monitor (in a dual monitor set up)

[Rory McCann]

I have 2 monitors plugged in and using in a dual screen set up. Occasionally (~ once or twice per month), the mouse pointer will just dissappear from the left monitor. The screen still displays stuff and is updated. I can move the mouse pointer over to that monitor and i can still click on things and the clicks cause actions etc., however I can't see the pointer. This only happens to the left monitor. This is a work machine and the only sort of programmes I'm running is a webbrowser, terminal, gVim, etc., no full screen applications or game or 3d graphics or anything like this.

How do I fix this? Is there more information I can provide?

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: nouveau-firmware (not installed)
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic-pae 2.6.38.8
Uname: Linux 2.6.38-11-generic-pae i686
Architecture: i386
Date: Tue Sep 6 12:00:24 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu-Server 10.04 LTS "Lucid Lynx" - Release i386 (20100427)
ProcEnviron:
 LANGUAGE=en_IE:en
 PATH=(custom, user)
 LANG=en_IE.UTF-8
 SHELL=/bin/bash
SourcePackage: nouveau-firmware
UpgradeStatus: Upgraded to natty on 2011-06-09 (89 days ago)

[Rory McCann (rorymcc)]

I should add, that when this happens, the only solution is to log out and log back in again.