On Thu, Sep 17, 2015 at 08:54:28AM -0400, David Scaperoth wrote:
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
Hi David, I recommend you start with the support community of your distribution, which in your case is Ubuntu. https://help.ubuntu.com/community/WifiDocs/WirelessTroubleShootingGuide That has a trouble shooting guide and a link to where to ask if the problem persists. Distribution communities are great to solve issues like this. The Kernel Newbies mailing list focuses in people new to Linux Kernel development. Hopefully your wifi works well soon :) Luis