I think it is. Although I can't test it, another machine being upgraded while the driver is changed would also cause X to not start. The same thing would happen if you decide to downgrade from the nv driver to nvidia -- xorg.conf would point to the wrong driver.
I think it is. Although I can't test it, another machine being upgraded while the driver is changed would also cause X to not start. The same thing would happen if you decide to downgrade from the nv driver to nvidia -- xorg.conf would point to the wrong driver.