Hi, Every few days I've started to get my notebook's network connection giving out. This is what the log tells me: [Sat Jun 27 17:14:38 2015] wlan0: deauthenticated from 00:xx:xx:xx:xx:xx (Reason: 7=CLASS3_FRAME_FROM_NONASSOC_STA) [Sat Jun 27 17:14:38 2015] cfg80211: Calling CRDA to update world regulatory domain [Sat Jun 27 17:14:38 2015] wlan0: authenticate with 00:xx:xx:xx:xx:xx [Sat Jun 27 17:14:38 2015] wlan0: send auth to 00:xx:xx:xx:xx:xx [Sat Jun 27 17:14:38 2015] cfg80211: World regulatory domain updated: [Sat Jun 27 17:14:38 2015] cfg80211: DFS Master region: unset [Sat Jun 27 17:14:38 2015] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) [Sat Jun 27 17:14:38 2015] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A) [Sat Jun 27 17:14:38 2015] cfg80211: (2457000 KHz - … etc. Restarting network-manager often fixes it, but not always. This is on Ubuntu 15.04, x86_64. Network card is Intel Centrino Advanced-N 6235, which may well be part of the problem. I realize that there's more info I should add, but short of dumping all of /etc on you, I don't know what else would be useful. cheers, Stewart