Could not connect to wpa_supplicant: wlan0 - re-trying

[Michal Kazior]

On 15 December 2015 at 08:59, Bartlomiej Grzeskowiak
<bartlomiej.grzeskowiak at gmail.com> wrote:
> I work on embedded device and I am configuring the WLAN module
> (QCA6174 - ath10k driver) with wpa_supplicant.
>
> I load the driver modules (backports-20151120):
>
> insmod /lib/modules/3.10.65-b2196-h301/wlan/compat.ko;
> insmod lib/modules/3.10.65-b2196-h301/wlan/cfg80211.ko;
> insmod /lib/modules/3.10.65-b2196-h301/wlan/mac80211.ko;
> insmod /lib/modules/3.10.65-b2196-h301/wlan/ath.ko;
> insmod /lib/modules/3.10.65-b2196-h301/wlan/ath10k_core.ko skip_otp=y;
> insmod /lib/modules/3.10.65-b2196-h301/wlan/ath10k_pci.ko
>
> I start the wpa_supplicant (default wpa_supplicant.conf):
>
> wpa_supplicant -dd -Dwext -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf -B
> [  182.257304] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
>
> everything seems to work fine. I see the wlan0 interface,I can scan
> with iwlist, /var/run/wpa_supplicant/wlan0 exist.
>
> But I can not use wpa_cli interface:
>
>  #wpa_cli
>  wpa_cli v2.4
>  Copyright (c) 2004-2015, Jouni Malinen <j at w1.fi> and contributors
>  Selected interface 'wlan0'
>
> Interactive mode
>
> Could not connect to wpa_supplicant: wlan0 - re-trying
>
> Do you have any hints how can I track down the problem ?

I remember having trouble when I had /tmp mounted via 9p in my VM
which didn't work quite well with unix sockets. Mounting tmpfs on /tmp
helped.

Perhaps you're having a similar problem, i.e. something gets in the
way of creating a wpa_cli socket in /tmp? Or maybe it's a
permission/ownership problem?

I suggest you check wpa_supplicant logs (-dddd) to check if there are
any suspicious messages and run `strace wpa_cli -i wlan0` or `strace
wpa_cli -i wlan0 stat` to see if there's any syscall failing
(typically bind, sendto or recvfrom).


Michał