We are sorry to have confused you with poor English.
My wireless card is Qualcomm Atheros AR9285 Wireless Network Adapter.
kernel driver in use: ath9k driver.
Power management is OFF by Default.
but driver option is set to ps_enable=1.(ps_enable: Enable WLAN PowerSave)
$ cat /etc/modprobe.d/ath9k_powersave.conf
options ath9k ps_enable=1
# AC adapter connect & kernel 3.13.0-40-generic.
$ tail /var/log/pm-powersave.log
Running hook /etc/pm/power.d/wireless false:
Turning powersave for wlan0 off...Done. <--- off
/etc/pm/power.d/wireless false: success.
$ iwconfig
wlan0 IEEE 802.11bgn ESSID:"?????????"
Mode:Managed Frequency:2.412 GHz Access Point: ??:??:??:??:??:??
Bit Rate=1 Mb/s Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
off---> Power Management:off
Link Quality=46/70 Signal level=-64 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:2 Invalid misc:1278 Missed beacon:0
# AC adapter disconnect(battery power) & kernel 3.13.0-40-generic.
$ tail /var/log/pm-powersave.log
Running hook /etc/pm/power.d/wireless true:
Turning powersave for wlan0 on...Done. <--- on
/etc/pm/power.d/wireless true: success.
$ iwconfig
wlan0 IEEE 802.11bgn ESSID:"?????????"
Mode:Managed Frequency:2.412 GHz Access Point: ??:??:??:??:??:??
Bit Rate=1 Mb/s Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
on ---> Power Management:on
Link Quality=46/70 Signal level=-64 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:2 Invalid misc:1278 Missed beacon:0
Power management is works fine.
but kernel 3.13.0-41-generic & 3.13.0-43-generic is does not work.
# AC adapter connect & (kernel 3.13.0-41-generic or 3.13.0-43-generic).
$ tail /var/log/pm-powersave.log
Running hook /usr/lib/pm-utils/power.d/wireless true:
cat: /sys/class/net/wlan0/device/enabled: No such file or directory <--- error
/usr/lib/pm-utils/power.d/wireless true: success.
$ iwconfig
wlan0 IEEE 802.11bgn ESSID:"?????????"
Mode:Managed Frequency:2.412 GHz Access Point: ??:??:??:??:??:??
Bit Rate=1 Mb/s Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
off---> Power Management:off
Link Quality=46/70 Signal level=-64 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:2 Invalid misc:1278 Missed beacon:0
# AC adapter disconnect(battery power) & (kernel 3.13.0-41-generic or
3.13.0-43-generic).
** "ON" does not have it. **
$ tail /var/log/pm-powersave.log
cat: /sys/class/net/wlan0/device/enabled: No such file or directory <--- error
$ iwconfig
off---> Power Management:off
** a cause **
cat: /sys/class/net/wlan0/device/enabled: No such file or directory <--- error
"/sys/class/net/wlan0/device/enabled" is assumed in wireless script.
(wireless script: /usr/lib/pm-utils/power.d/wireless in pm-utils package)
but changed to "/sys/class/net/wlan0/device/enable" on kernel 3.13.0-41 &
43-generic.
(filename: enabled -> enable)
So can not control wireless script in pm-utils package.
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https://bugs.launchpad.net/bugs/1404612
Title:
Power management of the wireless LAN does not work.
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