I use ubuntu 14.04 and I have an Acer V3-571G laptop. I have an O2 Box 6431 modem which I have received from O2. My wifi connection works fine except when I restart ubuntu or laptop. Next time it does not connect again. I can see there is a lot going between kernel and the o2 box and I see deauthenticated in between. Here is
[34154.787149] wlan0: deauthenticated from 18:83:bf:a6:a2:fc (Reason: 3) [34154.872908] cfg80211: Calling CRDA to update world regulatory domain [34154.878624] cfg80211: World regulatory domain updated: [34154.878628] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) [34154.878630] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [34154.878632] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [34154.878633] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) [34154.878634] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [34154.878635] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [34158.386846] wlan0: authenticate with 18:83:bf:a6:a2:fc [34158.406281] wlan0: send auth to 18:83:bf:a6:a2:fc (try 1/3) [34158.408269] wlan0: authenticated [34158.409813] wlan0: associate with 18:83:bf:a6:a2:fc (try 1/3) [34158.438048] wlan0: RX AssocResp from 18:83:bf:a6:a2:fc (capab=0x411 status=0 aid=2) [34158.438127] wlan0: associated [34158.438267] cfg80211: Calling CRDA for country: DE [34158.442413] ath: EEPROM regdomain: 0x8114 [34158.442416] ath: EEPROM indicates we should expect a country code [34158.442418] ath: doing EEPROM country->regdmn map search [34158.442419] ath: country maps to regdmn code: 0x37 [34158.442421] ath: Country alpha2 being used: DE [34158.442422] ath: Regpair used: 0x37 [34158.442424] ath: regdomain 0x8114 dynamically updated by country IE [34158.442447] cfg80211: Regulatory domain changed to country: DE [34158.442448] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) [34158.442450] cfg80211: (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm) [34158.442452] cfg80211: (5150000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm) [34158.442453] cfg80211: (5250000 KHz - 5350000 KHz @ 40000 KHz), (N/A, 2000 mBm) [34158.442455] cfg80211: (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm) [34158.442457] cfg80211: (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm)
There are a number of other devices in our home network and they all work fine. Every time that this failure happens, no matter if I restart my laptop or delete wifi connection and reconnect it, it won't connect untill I restart the modem itself.
What is this problem about and how can I solve it?
P.S. Here is
wlan0 IEEE 802.11abgn ESSID:"o2-WLAN84" Mode:Managed Frequency:2.412 GHz Access Point: 18:83:BF:A6:A2:FC Bit Rate=115.6 Mb/s Tx-Power=16 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=60/70 Signal level=-50 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:127 Missed beacon:0
With more search I have found a workaround from 2011, which says:
Killing wpa_supplicant seems to resolve the issue for some people
Even though its tool old I will try it and update the question.