Comment # 13 on bug 1187195 from Sebastian Turza������ski

here's the evidence

I switched wifi off and unloaded it's module iwlwifi and now ethernet shows
high Wats
I switched internal display totally and dispaly backlight still shows high Wats

ower est.              Usage       Events/s    Category       Description
  15.9 W      0,0%                      Device         Display backlight
  11.0 W     15,9 pkts/s                Device         Network interface:
enp0s20f0u2u1i5 (cdc_ncm)
  833 mW      6,6 ms/s     694,0        Timer          tick_sched_timer
  385 mW     30,4 ms/s     320,8        Process        [PID 1937]
/usr/bin/Xorg.bin -nolisten tcp -auth
/run/sddm/{92cb42bd-59ed-4f40-8df3-0c837fb32379} -background none -noreset -di
  170 mW     23,4 ms/s     141,3        Process        [PID 2145]
/usr/bin/kwin_x11
  151 mW     52,4 ms/s     126,1        Process        [PID 2641]
/usr/bin/konsole