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Wireless problems

  • 23-06-2011 11:31PM
    #1
    tetsujin1979
    Registered Users, Registered Users 2 Posts: 495 ✭✭


    bought a Dell N7010 machine a few weeks ago, and installed Natty on it.
    Was having no problems at all until earlier this week when the wireless performance started degrading.

    The wireless connector is an Intel Centrino Wireless-N 1000, and it appears that there have been some issues with it with Ubuntu in the past, but they had been resolved, see http://ubuntuforums.org/showthread.php?t=1715785

    When I boot up, the speed is fine, but it slowly degrades to the point where it's unusable. I've discovered a workaround of sorts where I can disable networking, delete the connection from connections, and then re-enable networking and create a new connection, and then it starts all over again.
    iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"MyWirelessNetwork"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:25:9C:1D:A6:EC   
          Bit Rate=1 Mb/s   Tx-Power=14 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=53/70  Signal level=-57 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:180  Invalid misc:0   Missed beacon:0
    The bit rate can vary greatly: 
    iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"MyWirelessNetwork"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:25:9C:1D:A6:EC   
          [B]Bit Rate=121.5 Mb/s[/B]   Tx-Power=14 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=56/70  Signal level=-54 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:53  Invalid misc:0   Missed beacon:0

    there are no hardware or software issus that I can see 
    sudo rfkill list
0: dell-wifi: Wireless LAN
	Soft blocked: no
	Hard blocked: no
1: dell-bluetooth: Bluetooth
	Soft blocked: no
	Hard blocked: no
2: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
3: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no

    Has anyone had a similar problem, or know of a solution?


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