Updating from kernel 4.4.x to kernel 4.8.12 from the unstable repository reduced idle power usage from ~15 W to 8 W.
Tuning the power usage further with values recommended by powertop reduces power usage to 6.8 W.
Which programme do you use to check these values? I'm having a few battery problems with my Yoga S1
Yeah, I digged around after posting, already setup a startup command with --auto-tune, my battery is so much better, I can't believe it! :) Thanks!
Resume from suspend works fine if you disable Vt-d from BIOS.