Dell Latitude 5491

Firmware
The Linux firmware package will have to be installed, for certain components to work properly


 * iwlwifi-9000-pu-b0-jf-b0-34.ucode
 * i915/skl_dmc_ver1_27.bin

And add them space-separated in the kernel firmware selection:

Microcode
Be sure to follow the Wiki page on how to load the Intel microcode

Touchpad
To set the touchpad and keyboard knob in the kernel, do the following.

After that, the Synaptics article can be followed. Here is what is excpected:

Webcam
And add a user to the video group to access the.