I've been trying to extend my DELL S2340L monitor to my Lenovo y510p laptop. It clones the display fine but does not extend it, it cannot detect it. Nvidia X server settings is also somewhat different (no X Server Display Configuration). What is the problem and how can I fix it? Thank you.
lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 750M] (rev a1)