wireless disconnects on its own

[AnotherUser]

I think I've always had this issue on my pretty new Dell Inspiron 15R. My wireless connection works just fine ... for hours (even days sometimes), but then for no apparent reason, usually after some period of idle time (but not always), wireless gets disconnected. At this point, all I have to do is go into Network Center and reconnect my wlan0 to my home network, which works right away. Of course, the problem is that I have to do it by hand. Which brings me to my questions:

• Why is it disconnecting in the first place?
• Why isn't it reconnecting automatically after the connection is lost?
• Can I do something to improve the behavior?

Here's some relevant info from the system log:

Code: [Select]

03/04/13 07:45:47 AM localhost ntpd[2977] kernel time sync status change 4001
03/04/13 07:48:16 AM localhost klogd cfg80211: Calling CRDA to update world regulatory domain
03/04/13 07:48:17 AM localhost ifplugd(wlan0)[18818] Link beat lost.
03/04/13 07:48:17 AM localhost klogd cfg80211: World regulatory domain updated:
03/04/13 07:48:17 AM localhost klogd cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
03/04/13 07:48:17 AM localhost klogd cfg80211: Calling CRDA for country: US
03/04/13 07:48:17 AM localhost klogd cfg80211: Regulatory domain changed to country: US
03/04/13 07:48:17 AM localhost klogd cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
03/04/13 07:48:17 AM localhost klogd cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
03/04/13 07:48:23 AM localhost ifplugd(wlan0)[18818] Executing '/etc/ifplugd/ifplugd.action wlan0 down'.
03/04/13 07:48:23 AM localhost avahi-daemon[2860] Withdrawing address record for 192.168.0.7 on wlan0.
03/04/13 07:48:23 AM localhost avahi-daemon[2860] Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.0.7.
03/04/13 07:48:23 AM localhost avahi-daemon[2860] Interface wlan0.IPv4 no longer relevant for mDNS.
03/04/13 07:48:23 AM localhost avahi-daemon[2860] Withdrawing address record for fe80::6a5d:43ff:fe7d:3381 on wlan0.
03/04/13 07:48:23 AM localhost ifplugd(wlan0)[18818] Program executed successfully.
03/04/13 07:48:23 AM localhost klogd iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
03/04/13 07:48:23 AM localhost klogd iwlwifi 0000:02:00.0: Radio type=0x2-0x0-0x0
03/04/13 07:48:23 AM localhost klogd IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
03/04/13 07:49:19 AM localhost ntpd[2977] Deleting interface #25 wlan0, fe80::6a5d:43ff:fe7d:3381#123, interface stats: received=0, sent=0, dropped=0, active_time=55200 secs
03/04/13 07:49:19 AM localhost ntpd[2977] Deleting interface #26 wlan0, 192.168.0.7#123, interface stats: received=54, sent=54, dropped=0, active_time=55200 secs
03/04/13 07:50:01 AM localhost ntpd[2977] synchronized to LOCAL(0), stratum 10
03/04/13 07:50:01 AM localhost ntpd[2977] kernel time sync status change 0001

Here's what iwconfig says about my connection (when connected)

Code: [Select]

iwconfig
wlan0     IEEE 802.11bgn  ESSID:"CL_Wireless" 
          Mode:Managed  Frequency:2.412 GHz  Access Point: my:mac:address   
          Bit Rate:130 Mb/s   Tx-Power=16 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=67/70  Signal level=-43 dBm 
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:802  Invalid misc:72   Missed beacon:0

According to PCLOS control center --> hardware info, the card is an Intel Centrino Wireless-N 2230 using the iwlwifi kernel module

Let me know if I'm missing anything else that may be pertinent.

[AnotherUser]

Digging in deeper, it looks like I may not be the only one having this problem:

http://www.linuxforums.org/forum/slackware-linux/171903-avoid-calling-crda.html
http://forums.opensuse.org/english/get-technical-help-here/wireless/460700-strange-wifi-behaviour-breaks-connection-repeatedly.html
https://bbs.archlinux.org/viewtopic.php?id=149964

That last one may be interesting. It talks about the problem being somehow related to "netcfg" vs" NetworkManager". Looking into Synaptic, I see that we have something called NetworkManager in there. Is it the same thing? If so, what do I need to uninstall to remove "netcfg"?

[byourg]

I'm having the same issue with my computer Lenovo H430(PclinuxOS64RC1), I have an Atheros AR9485 Wireless Card in my desktop computer. After a few hours the icon disappears from the systray, then a little while later I loose the connection. I hope the devs can figure this out.

[zorlac]

FWIW, My laptop had initial wireless connection problems after I upgraded to a newer kernel so I dropped back and it was good again.