Comment 6 for bug 788607

It is a Toshiba Satellite A100-197 laptop. For the graphics lshw shows
Intel Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller.

If I reduce the resolution on the second monitor such that the virtual display is less than 2048 (or thereabouts) then the problem disappears.

The problem only appeared following an upgrade but I do not know exactly which version it appeared at. If necessary I could revert to earlier versions to determine exactly when it was introduced if someone can tell me how to do that.