[Virtual-pkg-base-maintainers] Bug#784084: base: wifi powersave not working

[danerk]

Package: base
Severity: normal

Dear Maintainer,

wifi powersave doesn't work on debian jessie. im using intel wireless 5300
(iwlwifi), but i don't know whether it is related to this specific hardware.

the command "iwconfig wlan0 power on" works and iwconfig is reporting an
enabled powersave mode with "Power Management:on".

BUT: power consumption and heat emission are the same. so it only shows that
powersave mode is working but on hardware level it isn't.

i'm using a thinkpad x301 with smapi interface for meassuring power
consumption.

typical power consumption are:

wheezy:
wifi powersave off: 7,3W
wifi powersave on: 6,5W
iwlwifi module removed: 6,5W

jessie:
wifi powersave off: 7,1W
wifi powersave on: 7,1W
iwlwifi module removed: 6,3W

(meassurments taken over 5 min in idle with error +-0,1W)



-- System Information:
Debian Release: 8.0
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.7-ckt9-dan (SMP w/2 CPU cores)
Locale: LANG=de_AT.UTF-8, LC_CTYPE=de_AT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)