A developer is telling me you should try our Rolling release (also OM Lx 4.2 at present) that it is much more likely that a newer version of nouveau would work. Worth a try any way.
Also if there is something we can fix so this hardware would work it would be fixed in Lx 4.2 not 4.1.
Post-edit: Actually we want to know if latest version of OM Lx works with your hardware. In general the graphic performance on older hardware of our ISO’s has gotten better since the time of Lx 4.1. Admittedly this is always going to be problematic but a lot of work has been and is being done upstream.