No it is not. When I turn the desktop in portrait view then the mouse movement turns likewise and that is driving me completely nuts.
I can turn the view counterclockwise with nVidia driver and/or iRotate (free program). I cannot inhibit the mouse to turn also making all movements just tilted 90 degrees. There must be a solution, but I cannot find it.
Are you sure that the sakasa program cant help you? i looked in the configuration of it and it allows rotate your mouse any degrees and also invert the X and y axes. The configuration of this program is in a little yellow arrow that is placed in your traybar.
I believe you need to check the "Rotate" box, and put there the angle you need. Also you need to uncheck the invert axes, i believe.
Marce, thank you for the answers, but I was rather looking somehwere else. Another program, resting in the background, will lower the overall capacity of using Sonar, etc. So I also looked at a "registry" solution, which must be there and also which I couldn't find. Maybe the best thing is buying another mouse with more sophisticated drivers than the standard microsoft for that pre-historic PS/2 mouse.