I'm attempting to run pm-suspend on my laptop (by shutting my lid and on command line), and its putting my AR9485 wifi card into a funk (i.e. wlan0 interface seen through ifconfig never returns upon resume).
I know theres a lot to this (power management - pm-utils and kernel, wireless drivers, general linux drivers, and possibly other things), just need a little direction on which rabbit hole to start down...haha.
Ive looked through the ath9k and wireless list archives and had no luck finding the same issue. I have tried different solutions (mostly related to pm-utils) from ubuntu's forums too.
an example of where it failed /var/log/pm-powersave.log
<snip>
Running hook /usr/lib/pm-utils/power.d/wireless true:
Turning powersave for wlan0 on...Error for wireless request "Set Power Management" (8B2C) :
SET failed on device wlan0 ; Operation not supported.
Failed.
/usr/lib/pm-utils/power.d/wireless true: success.
<snip>
AND...according to https://wireless.wiki.kernel.org/en/users/documentation/dynamic-power-save
I tried:
iw dev wlan0 set power_save on
command failed: Operation not supported (-95)
This is my first post to this list, so I'm not sure what information would be useful to help find a solution (or workaround). Here goes nothing (perhaps I should attach text files next time for large diagnostic information?):
I built an upstream kernel against gregkh staging tree with a Ubuntu distro just to see if this would fix my issue and it did not. Either way, here is some information:
>> uname -a
Linux xxx 4.2.0+ #1 SMP Sun Sep 6 05:53:34 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux
>> lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty
cat /proc/version
Linux version 4.2.0+ (gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04) ) #1 SMP Sun Sep 6 05:53:34 EDT 2015
>>lspci -vvnn
<snip>
01:00.0 Network controller [0280]: Qualcomm Atheros AR9485 Wireless Network Adapter [168c:0032] (rev 01)
Subsystem: Hewlett-Packard Company AR9485/HB125 802.11bgn 1×1 Wi-Fi Adapter [103c:1838]
<snip>
I could provide more information from lspci and lshw but I'm not sure what would help (if at all). The strangest thing about the whole matter is that if I reboot, the card comes back online just fine.
Thanks again for any help you can provide!
David
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