P2P: legacy devices regularly disconnect

christoph at wi-wa.net christoph
Wed Jul 9 07:34:01 PDT 2014

Hi everyone,

in the meantime I have done some tests with the same setup on a regular laptop
(the device used before was an embedded device). On the laptop, the setting
seems to work and the legacy devices do not disconnect on a regular basis. Since
the laptop has a recent 3.x kernel installed, I was wondering if the ath*
drivers could be responsible for the problem I'm experiencing on the embedded
device. Can anyone tell me please which version of the ath*-drivers is minimally
needed to get it running? Is it at all possible on a 2.6.38 kernel?


> "christoph at wi-wa.net" <christoph at wi-wa.net> hat am 7. Juli 2014 um 15:47
> geschrieben:
> Hi everyone,
> I'm trying to get a setup working which has both P2P and legacy clients. I use
> the following configuration:
> ctrl_interface=/var/run/wpa_supplicant
> network={
>         mode=3
>         disabled=2
>         ssid="DIRECT-GO-test"
>         frequency=5180
>         key_mgmt=WPA-PSK
>         proto=RSN
>         pairwise=CCMP
>         psk="mysecret"
> }
> ap_scan=1
> country=CH
> device_name=device-15
> device_type=6-0050F204-1
> serial_number=1215
> p2p_go_intent=15
> p2p_go_max_inactivity=300
> I then run wpa_supplicant with:
> wpa_supplicant -Dnl80211 -c /etc/wpa_supplicant.conf -i wlan0 -B
> and configure the P2P with:
> wpa_cli -i wlan0 p2p_group_add persistent=0 freq=5180
> This seemed to work at first since both P2P and legacy clients see the network
> and can connect to it. I then noticed, that the legacy devices get
> disconnected
> regularly after ~5-10 seconds and reconnect again afterwards. Running
> wpa_supplicant with the "-dd" option does not reveal any activity, neither
> does
> the syslog. If I constantly ping a connected device, it does not disconnect
> though until I stop pinging.
> Any ideas on what could be wrong?
> Thanks for any help!
> P.S.:
> The machine that runs the wpa_supplicant: "Linux device-15 #3 Mon Jun
> 24 18:00:26 CST 2013 armv5teb GNU/Linux"
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