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[SOLVED]After upgrade from 11.04 to 11.10, cannot see wireless network

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    #1

    [SOLVED]After upgrade from 11.04 to 11.10, cannot see wireless network

    Just upgraded my laptop from 11.04 to 11.10 and while there were a few problems, got everything solved except that my laptop cannot see my wireless router (something it did without a hitch in 11.04). My wireless card is a Broadcom bcm4312.

    I click on the network settings applet, click on wireless->add->scan and my router is nowhere to be seen. I'm a complete noob on wireless networking, so I have no idea how to fix it.
    Hyperbole is the worst thing EVER.
    Tags: None
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    #2
    Re: After upgrade from 11.04 to 11.10, cannot see wireless network

    Maybe Re: bcm4312
    Windows no longer obstructs my view.
    Using Kubuntu Linux since March 23, 2007.
    "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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      #3
      Re: After upgrade from 11.04 to 11.10, cannot see wireless network

      Originally posted by Snowhog
      Maybe Re: bcm4312
      Thanks for your response. That solution did not work for me.
      Hyperbole is the worst thing EVER.
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        #4
        Re: After upgrade from 11.04 to 11.10, cannot see wireless network

        I don't know what kind of laptop you have and this is probably a shot in the dark; however, I'll shoot anyway. It sounds as though your wireless card is turned off. I don't know about your notebook, but mine has a switch on the side which turns the wireless card off. Sometimes, I inadvertently move that switch to the off position when doing something like packing up my notebook for transport. When this happens and I boot up, I got no wireless.

        This sounds sort of like, "Did you plug it in?", but, well, did you?

        Just trying to help...
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          #5
          Re: After upgrade from 11.04 to 11.10, cannot see wireless network

          Thank you, Lee, for the suggestion. I have a Dell Inspiron laptop and have checked and double-checked the hotkeys for toggling wireless. That is not the problem either. In the meantime, I have tried this solution: http://ubuntuforums.org/showthread.php?t=1859749, but that also was ineffective. I got to the point where I just decided to reinstall kubuntu 11.10 from scratch, but after doing so, the problem persists. My next step is to try another distro. Any suggestions?
          Hyperbole is the worst thing EVER.
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            #6
            Re: After upgrade from 11.04 to 11.10, cannot see wireless network

            What's the output of this command:

            Code:
            rfkill list
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              #7
              Re: After upgrade from 11.04 to 11.10, cannot see wireless network

              Originally posted by manwithcake
              Thank you, Lee, for the suggestion. I have a Dell Inspiron laptop and have checked and double-checked the hotkeys for toggling wireless. That is not the problem either. In the meantime, I have tried this solution: http://ubuntuforums.org/showthread.php?t=1859749, but that also was ineffective. I got to the point where I just decided to reinstall kubuntu 11.10 from scratch, but after doing so, the problem persists. My next step is to try another distro. Any suggestions?
              Actually, I'm not talking about hot-keys. I have a Dell Latitude and there is a switch on one end of my computer that slides back and forth turning the wireless on / off. I'm not familiar with the Inspiron, but do you have any kind of light visible from the top that indicates the wireless is powered up? All the Dells I've had in the past including this one have some sort of light indicating that the wireless is powered up. If you have a light, then I don't have anything else to offer as I am more of a programmer than a systems geek. If you don't have a light, check the switch. Should be on one end or the other.
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                #8
                Re: After upgrade from 11.04 to 11.10, cannot see wireless network

                Originally posted by SteveRiley
                What's the output of this command:

                Code:
                rfkill list
                0: brcmwl-0: Wireless LAN
                Soft blocked: no
                Hard blocked: no
                1: dell-wifi: Wireless LAN
                Soft blocked: no
                Hard blocked: no
                Hyperbole is the worst thing EVER.
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                  #9
                  Re: After upgrade from 11.04 to 11.10, cannot see wireless network

                  I don't have a Dell laptop, so I can't verify, but from the output below, it appears you have two wireless cards. Would you mind showing us the output of a few more commands? Yes, these are some of the same commands from the Ubuntu forum post you referenced.

                  Code:
                  lspci -nn

lsusb

ifconfig

iwconfig

iwlist scan

cat /etc/network/interfaces
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                    #10
                    Re: After upgrade from 11.04 to 11.10, cannot see wireless network

                    lspci -nn
                    00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07)
                    00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
                    00:02.1 Display controller [0380]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a43] (rev 07)
                    00:1a.0 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 [8086:2937] (rev 03)
                    00:1a.1 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 [8086:2938] (rev 03)
                    00:1a.2 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 [8086:2939] (rev 03)
                    00:1a.7 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 [8086:293c] (rev 03)
                    00:1b.0 Audio device [0403]: Intel Corporation 82801I (ICH9 Family) HD Audio Controller [8086:293e] (rev 03)
                    00:1c.0 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 [8086:2940] (rev 03)
                    00:1c.1 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 [8086:2942] (rev 03)
                    00:1c.2 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 [8086:2944] (rev 03)
                    00:1c.4 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 [8086:2948] (rev 03)
                    00:1d.0 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 [8086:2934] (rev 03)
                    00:1d.1 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 [8086:2935] (rev 03)
                    00:1d.2 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 [8086:2936] (rev 03)
                    00:1d.7 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 [8086:293a] (rev 03)
                    00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev 93)
                    00:1f.0 ISA bridge [0601]: Intel Corporation ICH9M LPC Interface Controller [8086:2919] (rev 03)
                    00:1f.2 SATA controller [0106]: Intel Corporation ICH9M/M-E SATA AHCI Controller [8086:2929] (rev 03)
                    00:1f.3 SMBus [0c05]: Intel Corporation 82801I (ICH9 Family) SMBus Controller [8086:2930] (rev 03)
                    09:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8040 PCI-E Fast Ethernet Controller [11ab:4354] (rev 13)
                    0c:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)

                    lsusb
                    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
                    Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
                    Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
                    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
                    Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
                    Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
                    Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
                    Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
                    Bus 007 Device 002: ID 192f:0416 Avago Technologies, Pte.

                    ifconfig
                    eth0 Link encap:Ethernet HWaddr f0:4d:a2:af:58:b1
                    inet addr:192.168.2.4 Bcast:192.168.2.255 Mask:255.255.255.0
                    inet6 addr: fe80::f24d:a2ff:feaf:58b1/64 Scope:Link
                    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
                    RX packets:26303 errors:0 dropped:0 overruns:0 frame:0
                    TX packets:17183 errors:0 dropped:0 overruns:0 carrier:0
                    collisions:0 txqueuelen:1000
                    RX bytes:35325192 (35.3 MB) TX bytes:1902739 (1.9 MB)
                    Interrupt:18

                    eth2 Link encap:Ethernet HWaddr 78:e4:00:e2:65:16
                    inet6 addr: fe80::7ae4:ff:fee2:6516/64 Scope:Link
                    UP BROADCAST MULTICAST MTU:1500 Metric:1
                    RX packets:0 errors:0 dropped:0 overruns:0 frame:0
                    TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
                    collisions:0 txqueuelen:1000
                    RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
                    Interrupt:17 Base address:0xc000

                    lo Link encap:Local Loopback
                    inet addr:127.0.0.1 Mask:255.0.0.0
                    inet6 addr: ::1/128 Scope:Host
                    UP LOOPBACK RUNNING MTU:16436 Metric:1
                    RX packets:8 errors:0 dropped:0 overruns:0 frame:0
                    TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
                    collisions:0 txqueuelen:0
                    RX bytes:400 (400.0 B) TX bytes:400 (400.0 B)

                    iwconfig
                    lo no wireless extensions.

                    eth0 no wireless extensions.

                    eth2 IEEE 802.11 Access Point: Not-Associated
                    Link Quality:5 Signal level:0 Noise level:0
                    Rx invalid nwid:0 invalid crypt:0 invalid misc:0

                    iwlist scan
                    lo Interface doesn't support scanning.

                    eth0 Interface doesn't support scanning.

                    eth2 Interface doesn't support scanning.

                    cat /etc/network/interfaces
                    auto lo
                    iface lo inet loopback
                    Hyperbole is the worst thing EVER.
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                      #11
                      Re: After upgrade from 11.04 to 11.10, cannot see wireless network

                      I have a Dell Latitude and the output from the command on my machine is very similar to his:
                      terry@genesis:~$ rfkill list
                      0: dell-wifi: Wireless LAN
                      Soft blocked: no
                      Hard blocked: no
                      1: phy0: Wireless LAN
                      Soft blocked: no
                      Hard blocked: no

                      I don't have two wireless cards and he probably doesn't either.
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                        #12
                        Re: After upgrade from 11.04 to 11.10, cannot see wireless network

                        Curious. My ThinkPad (Intel wireless) and my HP Mini (Broadcom wireless) each show only one entry in rfkill list.

                        Let's continue investigating:

                        Code:
                        sudo lshw -C network

lsmod | egrep -i 'wl|bc'
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                          #13
                          Re: After upgrade from 11.04 to 11.10, cannot see wireless network

                          sudo lshw -C network
                          *-network
                          description: Wireless interface
                          product: BCM4312 802.11b/g LP-PHY
                          vendor: Broadcom Corporation
                          physical id: 0
                          bus info: pci@0000:0c:00.0
                          logical name: eth2
                          version: 01
                          serial: 78:e4:00:e2:65:16
                          width: 64 bits
                          clock: 33MHz
                          capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                          configuration: broadcast=yes driver=wl0 driverversion=5.100.82.38 latency=0 multicast=yes wireless=IEEE 802.11bg
                          resources: irq:17 memory:f69fc000-f69fffff
                          *-network
                          description: Ethernet interface
                          product: 88E8040 PCI-E Fast Ethernet Controller
                          vendor: Marvell Technology Group Ltd.
                          physical id: 0
                          bus info: pci@0000:09:00.0
                          logical name: eth0
                          version: 13
                          serial: f0:4d:a2:af:58:b1
                          size: 100Mbit/s
                          capacity: 100Mbit/s
                          width: 64 bits
                          clock: 33MHz
                          capabilities: pm msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
                          configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.28 duplex=full firmware=N/A ip=192.168.2.4 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
                          resources: irq:44 memory:f68fc000-f68fffff ioport:de00(size=256)

                          lsmod | egrep -i 'wl|bc'
                          wl 2568210 0
                          lib80211 14991 2 lib80211_crypt_tkip,wl
                          Hyperbole is the worst thing EVER.
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                            #14
                            Re: [SOLVED]After upgrade from 11.04 to 11.10, cannot see wireless network

                            In one of those "DOH!" moments, I logged onto the web gui for the router and discovered that in changing a couple of the settings, I had inadvertently unchecked a box by "Broadcast this network?" which meant it was invisible. After checking the box, Kubuntu sees the router and connects fine.

                            Sorry for the bone-headedness.
                            Hyperbole is the worst thing EVER.
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                              #15
                              Re: [SOLVED]After upgrade from 11.04 to 11.10, cannot see wireless network

                              Wow. Glad you got that sorted, because my next suggestion was going to involve minor surgery of your operating system!
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