I can confirm this bug - had a 3-Monitor setup working with a T520 and NVidia optimus on Ubuntu 16.04 - after some update ( unfortunately I cannot track down the specific one ) - I am getting this error
I can confirm this bug - had a 3-Monitor setup working with a T520 and NVidia optimus on Ubuntu 16.04 - after some update ( unfortunately I cannot track down the specific one ) - I am getting this error