Do you have an iGPU as well?
If that's the case, the mx150 needs to copy over the framebuffer to that one when you use the internal display. Performance can improve with an external display, but don't expect wonders.
Do you have an iGPU as well?
If that's the case, the mx150 needs to copy over the framebuffer to that one when you use the internal display. Performance can improve with an external display, but don't expect wonders.