I had purchased Dell Inspiron 15 (7559) when I entered my current job at Navigo3. I was asked to buy Dell to keep same brand with other laptops in company. I made some research and only feasible option (SSD, 16GB RAM, …) was this one. Unfortunately it is based on Intel Skylake which is not fully supported in Ubuntu 16.04 yet. It should be better with 4.8 kernel that should be backported in February 2017.
However main issue is dedicated graphics. I have experiences various issues from freezing during boot, problems with suspend, setting resolution on multiple screens, etc. Because I mostly do web development, I don’t need dedicated graphic card. So I decided to switch off dedicated card and keep only Intel HD Graphics 530. It is quite easy:
apt install bbswitch-dkms
Switch off NVIDIA card by appending following into /etc/modules
Blacklist NVIDIA by appending following into /etc/modprobe.d/blacklist.conf
And finally update initial ramdisk by running
After reboot only Intel should be enabled:
Credits: http://askubuntu.com/a/709552/93726 (Sorry, I cannot upvote because I don’t have enough reputation points)