Lost wlan access after upgrade

Please first connect your network card to the wireless router using an ethernet cable (also known as a LAN cable).

In order to gather essential troubleshooting information about your wireless card, please follow this procedure:

Step 1: Open Terminal from "Applications->Accessories->Terminal"

Step 2: Run the following command. The command STARTS with the word sudo and ENDS with the word restart. So please copy-paste the ENTIRE command below into a Terminal, press enter, then enter password when sudo asks for password, then press enter again.

sudo lshw -C network; sudo iwlist scanning; cat /etc/network/interfaces; cat /etc/lsb-release; lspci -nn; lsusb; uname -a; dmesg | grep ound; dmesg | grep b43; dmesg | grep iwl; iwconfig; sudo /etc/init.d/networking restart

Step 3: Please post results (copy/paste terminal output) on this thread

Thank you

dan@dan-laptop:~$ sudo lshw -C network; sudo iwlist scanning; cat /etc/network/interfaces;
[sudo] password for dan:
  *-network:0
       description: Wireless interface
       product: PRO/Wireless 2200BG [Calexico2] Network Connection
       vendor: Intel Corporation
       physical id: 5
       bus info: pci@0000:02:05.0
       logical name: eth1
       version: 05
       serial: 00:0e:35:47:d2:74
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=ipw2200 driverversion=1.2.2kmprq firmware=ABG:9.0.2.6 (Mar 22 2005) latency=64 link=no maxlatency=24 mingnt=3 module=ipw2200 multicast=yes wireless=unassociated
  *-network:1
       description: Ethernet interface
       product: 82801DB PRO/100 VE (MOB) Ethernet Controller
       vendor: Intel Corporation
       physical id: 8
       bus info: pci@0000:02:08.0
       logical name: eth0
       version: 83
       serial: 00:0e:7b:2a:8c:17
       size: 100MB/s
       capacity: 100MB/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e100 driverversion=3.5.23-k6-NAPI duplex=full firmware=N/A ip=192.168.1.67 latency=66 link=yes maxlatency=56 mingnt=8 module=e100 multicast=yes port=MII speed=100MB/s
  *-network DISABLED
       description: Ethernet interface
       physical id: 2
       logical name: pan0
       serial: 22:ad:88:55:b1:72
       capabilities: ethernet physical
       configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A link=yes multicast=yes
lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

eth1 Scan completed :
          Cell 01 - Address: 00:1B:5B:D2:E1:01
                    ESSID:"2WIRE513"
                    Protocol:IEEE 802.11bg
                    Mode:Master
                    Frequency:2.412 GHz (Channel 1)
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Quality=48/100 Signal level=-27 dBm
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (1) : PSK
                    Extra: Last beacon: 184ms ago
          Cell 02 - Address: 00:0D:72:4E:06:39
                    ESSID:"2WIRE499"
                    Protocol:IEEE 802.11b
                    Mode:Master
                    Frequency:2.437 GHz (Channel 6)
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                    Quality=48/100 Signal level=-72 dBm
                    Extra: Last beacon: 68ms ago
          Cell 03 - Address: 00:21:7C:A0:7C:C1
                    ESSID:"2WIRE795"
                    Protocol:IEEE 802.11bg
                    Mode:Master
                    Frequency:2.462 GHz (Channel 11)
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Quality=27/100 Signal level=-83 dBm
                    Extra: Last beacon: 6392ms ago
          Cell 04 - Address: 00:11:50:AC:ED:18
                    ESSID:"belkin54g"
                    Protocol:IEEE 802.11bg
                    Mode:Master
                    Frequency:2.462 GHz (Channel 11)
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Quality=27/100 Signal level=-83 dBm
                    Extra: Last beacon: 2388ms ago
          Cell 05 - Address: 00:1A:70:78:33:F5
                    ESSID:"Capers Net"
                    Protocol:IEEE 802.11bg
                    Mode:Master
                    Frequency:2.452 GHz (Channel 9)
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Quality=33/100 Signal level=-80 dBm
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (1) : PSK
                    Extra: Last beacon: 700ms ago
          Cell 06 - Address: 00:22:3F:D4:A5:18
                    ESSID:"NETGEAR7"
                    Protocol:IEEE 802.11bg
                    Mode:Master
                    Frequency:2.462 GHz (Channel 11)
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Quality=27/100 Signal level=-83 dBm
                    Extra: Last beacon: 256ms ago

pan0 Interface doesn't support scanning.

auto lo
iface lo inet loopback

dan@dan-laptop:~$ AAAAAAAA

Hi,

Try rebooting your pc. Press ESC immediately after the BIOS information is displayed. This will let you access the GRUB boot menu. In the GRUB boot menu, choose the oldest available Ubuntu kernel and boot that one.

It is likely that one of the latest updates you installed was a newer Linux kernel that does not want to play nicely with your wireless card.

Regards,

Mark