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Update to kernel 3.13 removed ability to set powersave on AR9462 (ath9k)
Using iw and powertop and laptop-mode-tools to turn on powersave mode for wlan chip in my laptop (which is an AR9462) fails. In powertop nothing happens, but if I run the --calibrate script the program segfaults when testing the wlan chip. As for iw it returns:
Code:
command failed: Operation not supported (-95) Code:
Error for wireless request "Set Power Management" (8B2C) : Code:
Author: Sujith Manoharan <c_manoha@qca.qualcomm.com> Here is my lspci dump for the device. Code:
03:00.0 Network controller: Atheros Communications Inc. AAR9462 Wireless Network Adapter (rev 01) |
List the possible parameters with
Code:
/sbin/modinfo ath9k Code:
modprobe -r ath9k Code:
modprobe ath9k ps_enable=1 Keep in mind any wifi issues you may experience could be caused by forcing this setting. You can make this change permanent by creating /etc/modprobe.d/ath9kps.conf containing Code:
options ath9k ps_enable=1 |
That must be a real recent update. That parm doesn't show in this Fedora 3.13.6 kernel, but does in the update I just downloaded from the repos.
And @blip was correct, it is called ps_enable. |
Thank you blip. Setting the module parameter allowed me to set turn on power save mode using the programs I mentioned. I am also happy to mention in works in the 3.14 kernel.
And @syg00, yes the kernel revision I am using is 3.13.7. But, according to the kernel mailing lists, the change occured in the 3.13.5 kernel. It's odd it didn't appear to you at first. |
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