Solved upstream with kernel 4.11 RC1 from Ubuntu kernel archive. I'm back to 4.23 W instead of 8.26 W in same power conditions.
I reach PC8 power state (powertop) instead of PC3.
Hope the APST Andy's patch (I guess it's the key ?) will be backported soon to Zesty's kernel.
Solved upstream with kernel 4.11 RC1 from Ubuntu kernel archive.
I'm back to 4.23 W instead of 8.26 W in same power conditions.
I reach PC8 power state (powertop) instead of PC3.
Hope the APST Andy's patch (I guess it's the key ?) will be backported soon to Zesty's kernel.