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.
Status in linux package in Ubuntu:
Incomplete
Bug description:
wireless script(/usr/lib/pm-utils/power.d/wireless) fixed by bug:1299975
https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/1299975
/usr/lib/pm-utils/power.d/wireless
--->---> snip --->---> snip --->---> snip --->---> snip --->--->
23 [ "$(cat /sys/class/net/$1/device/enabled)" = "1" ] || return 1
--->---> snip --->---> snip --->---> snip --->---> snip --->--->
Power management works fine.
There is no problem to kernel-3.13.0-40.
but kernel-3.13.0-41 & -43 changed to /sys/class/net/wlan0/device/enable.
( enabled -> enable )
Power management does not work.
$ tail /var/log/pm-powersave.log
--->---> snip --->---> snip --->---> snip --->---> snip --->--->
Running hook /usr/lib/pm-utils/power.d/wireless false:
cat: /sys/class/net/wlan0/device/enabled: No such file or directory
/usr/lib/pm-utils/power.d/wireless false: success.
--->---> snip --->---> snip --->---> snip --->---> snip --->--->
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-43-generic 3.13.0-43.72
ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
Uname: Linux 3.13.0-43-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: yokoyama 2136 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Dec 21 15:46:21 2014
HibernationDevice: RESUME=UUID=6ff533bf-2108-48e8-a717-5551b42f6ee7
InstallationDate: Installed on 2014-04-18 (247 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: LENOVO 26897LJ
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic.efi.signed
root=UUID=4ba0cc0c-00ce-4685-ba4c-cc3ea1a9b01a ro clocksource=hpet quiet splash
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-43-generic N/A
linux-backports-modules-3.13.0-43-generic N/A
linux-firmware 1.127.10
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/12/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 62CN97WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Lenovo G580
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo G580
dmi.modalias:
dmi:bvnLENOVO:bvr62CN97WW:bd07/12/2013:svnLENOVO:pn26897LJ:pvrLenovoG580:rvnLENOVO:rnLenovoG580:rvrNotDefined:cvnLENOVO:ct10:cvrLenovoG580:
dmi.product.name: 26897LJ
dmi.product.version: Lenovo G580
dmi.sys.vendor: LENOVO
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