https://bugzilla.kernel.org/show_bug.cgi?id=70881

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https://bugs.launchpad.net/bugs/1294558

Title:
  intel 7260 failing to associate with 802.11ac AP, "changed bandwidth"
  issues

Status in “linux” package in Ubuntu:
  In Progress

Bug description:
  With latest 14.04 3.13.0-18 kernel, it can't connect to 802.11ac AP
  It keeps showing the following message in dmesg
  [ 1284.044783] cfg80211: Calling CRDA to update world regulatory domain
  [ 1284.051440] cfg80211: World regulatory domain updated:
  [ 1284.051449] cfg80211:   (start_freq - end_freq @ bandwidth), 
(max_antenna_gain, max_eirp)
  [ 1284.051456] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 
2000 mBm)
  [ 1284.051460] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 
2000 mBm)
  [ 1284.051465] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 
2000 mBm)
  [ 1284.051470] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 
2000 mBm)
  [ 1284.051475] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 
2000 mBm)
  [ 1287.459327] wlan0: authenticate with 3c:ce:73:48:04:60
  [ 1287.461299] wlan0: send auth to 3c:ce:73:48:04:60 (try 1/3)
  [ 1287.463968] wlan0: authenticated
  [ 1287.467357] wlan0: associate with 3c:ce:73:48:04:60 (try 1/3)
  [ 1287.470570] wlan0: RX AssocResp from 3c:ce:73:48:04:60 (capab=0x431 
status=0 aid=1)
  [ 1287.471799] wlan0: associated
  [ 1287.471913] cfg80211: Calling CRDA for country: TW
  [ 1287.477710] cfg80211: Regulatory domain changed to country: TW
  [ 1287.477714] cfg80211:   (start_freq - end_freq @ bandwidth), 
(max_antenna_gain, max_eirp)
  [ 1287.477717] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 
2700 mBm)
  [ 1287.477719] cfg80211:   (5270000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 
1700 mBm)
  [ 1287.477721] cfg80211:   (5735000 KHz - 5815000 KHz @ 40000 KHz), (300 mBi, 
3000 mBm)
  [ 1327.972283] cfg80211: Calling CRDA to update world regulatory domain
  [ 1327.978960] cfg80211: World regulatory domain updated:
  [ 1327.978967] cfg80211:   (start_freq - end_freq @ bandwidth), 
(max_antenna_gain, max_eirp)
  [ 1327.978972] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 
2000 mBm)
  [ 1327.978977] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 
2000 mBm)
  [ 1327.978980] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 
2000 mBm)
  [ 1327.978984] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 
2000 mBm)
  [ 1327.978987] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 
2000 mBm)
  [ 1328.104080] wlan0: authenticate with 3c:ce:73:48:0e:40
  [ 1328.106021] wlan0: send auth to 3c:ce:73:48:0e:40 (try 1/3)
  [ 1328.107116] wlan0: authenticated
  [ 1328.108184] wlan0: associate with 3c:ce:73:48:0e:40 (try 1/3)
  [ 1328.116961] wlan0: RX AssocResp from 3c:ce:73:48:0e:40 (capab=0x431 
status=0 aid=25)
  [ 1328.117946] wlan0: associated
  [ 1328.118026] cfg80211: Calling CRDA for country: TW
  [ 1328.122543] cfg80211: Regulatory domain changed to country: TW
  [ 1328.122550] cfg80211:   (start_freq - end_freq @ bandwidth), 
(max_antenna_gain, max_eirp)
  [ 1328.122555] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 
2700 mBm)
  [ 1328.122560] cfg80211:   (5270000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 
1700 mBm)
  [ 1328.122563] cfg80211:   (5735000 KHz - 5815000 KHz @ 40000 KHz), (300 mBi, 
3000 mBm)

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