WiFi Link goes down

[nachiketh]

Hi Folks,
I'm using a USB WiFi dongle on my RPi, I have observed that after some time (~1Day) the WiFi goes down and requires me to reboot the rPi whenever that happens, upon going through the syslog I found the following error around the time the rPi went offline:

Code: Select all

Dec  4 10:18:24 raspberrypi ifplugd(wlan0)[388]: Link beat lost.
Dec  4 10:18:26 raspberrypi dhcpcd[2538]: wlan0: carrier lost
Dec  4 10:18:26 raspberrypi wpa_supplicant[1529]: wlan0: CTRL-EVENT-DISCONNECTED bssid=c0:4a:00:8d:ad:b2 reason=0
Dec  4 10:18:26 raspberrypi avahi-daemon[2199]: Withdrawing address record for 10.10.0.101 on wlan0.
Dec  4 10:18:26 raspberrypi avahi-daemon[2199]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 10.10.0.101.
Dec  4 10:18:26 raspberrypi avahi-daemon[2199]: Interface wlan0.IPv4 no longer relevant for mDNS.
Dec  4 10:18:26 raspberrypi dhcpcd[2538]: wlan0: deleting route to 10.10.0.0/24
Dec  4 10:18:26 raspberrypi dhcpcd[2538]: wlan0: deleting default route via 10.10.0.254
Dec  4 10:18:27 raspberrypi ntpd[2083]: Deleting interface #3 wlan0, 10.10.0.101#123, interface stats: received=151, sent=151, dropped=0, active_time=80028 secs
Dec  4 10:18:27 raspberrypi ntpd[2083]: 10.10.0.100 interface 10.10.0.101 -> (none)
Dec  4 10:18:27 raspberrypi ntpd[2083]: peers refreshed
Dec  4 10:18:32 raspberrypi wpa_supplicant[1529]: wlan0: Trying to associate with c0:4a:00:8d:ad:b2 (SSID='TP-LINK_POCKET_3020_8DADB2' freq=2462 MHz)
Dec  4 10:18:32 raspberrypi wpa_supplicant[1529]: wlan0: Association request to the driver failed
Dec  4 10:18:34 raspberrypi ifplugd(wlan0)[388]: Executing '/etc/ifplugd/ifplugd.action wlan0 down'.
Dec  4 10:18:34 raspberrypi wpa_supplicant[1529]: wlan0: CTRL-EVENT-TERMINATING - signal 15 received
Dec  4 10:18:34 raspberrypi ifplugd(wlan0)[388]: Program executed successfully.

So if any of you have any of you have faced a similar problem on the rPi, please let me know.
TIA!

[ryansinglehurst]

There are two primary methods to enable a passenger Internet connection on an airplane: satellite and air-to-ground. I'll talk about some of the key points on each of those, then talk about the in-cabin WiFi access point part.

[DougieLawson]

Have you disabled the power saving mode for your WiFi dongle?
viewtopic.php?p=855239#p855239

[nachiketh]

Have you disabled the power saving mode for your WiFi dongle?
viewtopic.php?p=855239#p855239

I'm unable to find the modprobe file for my adapter. The following is USB device details:

Code: Select all

Bus 001 Device 007: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)

also upon running iwconfig, it says power management is already off.

Code: Select all

pi@raspberrypi ~/LNC $ iwconfig 
wlan0     IEEE 802.11bgn  ESSID:XXXXX  Nickname:XXXX
          Mode:Managed  Frequency:2.462 GHz  Access Point:XXXX
          Bit Rate:150 Mb/s   Sensitivity:0/0  
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=98/100  Signal level=24/100  Noise level=0/100
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0