Some good update for those of you using linux on this laptop.,
With Ubuntu 18.04 and latest kernel 4.17 the touchpad phisical buttons work.
I did not experience touchpad freezing at the moment on resume but on system reboot it did. The problem is solved unloading and reloading the hid_multitouch module.
The popping sound of the Intel sound card is also there at boot, sleep and resume though.