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Thread: Wireless connection has disappeared - again! Ubuntu 12.04 LTS on Advent T1600

  1. #1
    Join Date
    Aug 2012
    Beans
    25

    Wireless connection has disappeared - again! Ubuntu 12.04 LTS on Advent T1600

    Hi all,

    My wireless connection has dropped off (for the third time in 12 months) this week. Last time I posted here

    HTML Code:
    http://ubuntuforums.org/showthread.php?t=2203285
    and found that running 13.04 off a USB boot stick brought it back to life, even when I reverted back to 12.04. I have no idea why that happened, but I was happy that it worked and just went with it.

    Now it has happened again, and my ethernet has also failed, so I cannot access the net at all on that device. I'll not post the outputs again, as they are the same as on the original thread, unless it would help to have them all here?

    Can anyone help or provide any ideas?

    Thanks

  2. #2
    Join Date
    Oct 2009
    Location
    Reykjavk, sland
    Beans
    9,476
    Distro
    Lubuntu 14.04 Trusty Tahr

    Re: Wireless connection has disappeared - again! Ubuntu 12.04 LTS on Advent T1600

    13.04 is out of support.
    In stead of going further with this one I suggest a fresh install of 13.10. Remember to use wired internet access while installing.
    About problems due to upgrading
    Bringing old hardware back to life.
    Please visit Quick Links -> Unanswered Posts

  3. #3
    Join Date
    Aug 2012
    Beans
    25

    Re: Wireless connection has disappeared - again! Ubuntu 12.04 LTS on Advent T1600

    Thanks. I've tried 13.10 and no joy. I also tried running LinuxMint from a USB, just to see if there was some sort of compatibility error with newer versions of Ubuntu, but it didn't see any networks there, and went into the same cycle of repeatedly requesting authentication when I tried to "connect to a hidden wireless network".

    I will confess my poor technical knowledge, but logically if there is the same issue with Ubuntu and LinuxMint, would this suggest a hardware problem rather than software? Or do the two systems have enough of a crossover that the same problem could apply to both? I'm looking at buying a little USB wifi dongle to see if that solves the issues.

  4. #4
    Join Date
    Oct 2009
    Location
    Reykjavk, sland
    Beans
    9,476
    Distro
    Lubuntu 14.04 Trusty Tahr

    Re: Wireless connection has disappeared - again! Ubuntu 12.04 LTS on Advent T1600

    I wasn't expecting 13.10 to work wirelessly in first attempt. The idea was installing a stable and updated system which people with more knowledge than me could use for further troubleshooting.

    Yes, a wifi dongle could be a good solution if everything else fails.
    About problems due to upgrading
    Bringing old hardware back to life.
    Please visit Quick Links -> Unanswered Posts

  5. #5
    Join Date
    Aug 2012
    Beans
    25

    Re: Wireless connection has disappeared - again! Ubuntu 12.04 LTS on Advent T1600

    Thanks. I hadn't been able to connect via ethernet previously, so I've run the 13.10 trial install again with it tethered to my mobile phone - but no change unfortunately.

    Are there any further things I should be trying? I've noticed lots of other networking problems which seem to be affecting people in the same way (cycling through requests for authentication) but they all seem to be very device-specific and I can't see any guides which I could try by myself without the assistance of someone much more knowledgable.

    Thanks again,

    C

  6. #6
    Join Date
    Aug 2012
    Beans
    25

    Re: Wireless connection has disappeared - again! Ubuntu 12.04 LTS on Advent T1600

    Bought a TRENDnet N150 USB adapter based on other posts which indicated plug & play capability. Ubuntu is recognising it and I can select it to make an attempt to connect, but the same cycle of requiring authentication is happening!

    There isn't any issue with the router itself, as I have another laptop running 12.04 which connects without any issues, and all my other mobile devices are working (mobile phones and Android tablet). I can connect this laptop using my mobile telephone via USB tethering, but nothing seems to be working when I connect via Ubuntu itself.

    I am totally stumped, any help would be appreciated!

  7. #7
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    5,539
    Distro
    Xubuntu 12.04 Precise Pangolin

    Re: Wireless connection has disappeared - again! Ubuntu 12.04 LTS on Advent T1600

    Please show the outputs of:
    Code:
    uname -a
    lspci -nnk | grep -iA2 net
    lsusb
    lsmod
    ifconfig -a
    iwconfig
    cat /etc/resolv.conf
    iwlist chan
    sudo iwlist scan
    Does LAN work?

  8. #8
    Join Date
    Aug 2012
    Beans
    25

    Re: Wireless connection has disappeared - again! Ubuntu 12.04 LTS on Advent T1600

    Hello, and thanks...

    No connection to the internet is available except via USB tethering.

    uname -a gives:

    Code:
    Linux chris-DIXONSXP 3.2.0-60-generic #91-Ubuntu SMP Wed Feb 19 03:55:18 UTC 2014 i686 i686 i386 GNU/Linux
    lspci -nnk | grep -iA2 net gives:

    Code:
    04:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8187SE Wireless LAN Controller [10ec:8199] (rev 22)
        Subsystem: Realtek Semiconductor Co., Ltd. RTL8187SE Wireless LAN Controller [10ec:8199]
        Kernel driver in use: r8180
    --
    05:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 02)
        Subsystem: Elitegroup Computer Systems Device [1019:90b3]
        Kernel driver in use: r8169
    lsusb gives:

    Code:
    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 001 Device 003: ID 0bda:0158 Realtek Semiconductor Corp. USB 2.0 multicard reader
    Bus 001 Device 004: ID 0bda:8171 Realtek Semiconductor Corp. RTL8188SU 802.11n WLAN Adapter
    Bus 002 Device 003: ID 0fce:71a7 Sony Ericsson Mobile Communications AB
    lsmod gives:

    Code:
    Module                  Size  Used by
    rndis_host             13560  0 
    cdc_ether              13312  1 rndis_host
    usbnet                 25214  2 rndis_host,cdc_ether
    pci_stub               12550  1 
    vboxpci                22911  0 
    vboxnetadp             25616  0 
    vboxnetflt             27240  0 
    vboxdrv               285013  3 vboxpci,vboxnetadp,vboxnetflt
    joydev                 17393  0 
    snd_hda_codec_hdmi     31823  1 
    snd_hda_codec_realtek   174313  1 
    snd_hda_intel          32719  3 
    snd_hda_codec         109562  3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
    snd_hwdep              13276  1 snd_hda_codec
    snd_pcm                80916  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
    snd_seq_midi           13132  0 
    snd_rawmidi            25424  1 snd_seq_midi
    r8712u                163880  0 
    snd_seq_midi_event     14475  1 snd_seq_midi
    psmouse                96744  0 
    snd_seq                51592  2 snd_seq_midi,snd_seq_midi_event
    serio_raw              13027  0 
    snd_timer              28931  2 snd_pcm,snd_seq
    snd_seq_device         14172  3 snd_seq_midi,snd_rawmidi,snd_seq
    r8187se               157152  0 
    eeprom_93cx6           12687  1 r8187se
    snd                    62218  16 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
    uvcvideo               67203  0 
    videodev               86588  1 uvcvideo
    soundcore              14635  1 snd
    snd_page_alloc         14115  2 snd_hda_intel,snd_pcm
    bnep                   17830  2 
    rfcomm                 38139  0 
    parport_pc             32114  0 
    bluetooth             158447  10 bnep,rfcomm
    ppdev                  12849  0 
    i915                  428282  4 
    drm_kms_helper         45466  1 i915
    drm                   197641  5 i915,drm_kms_helper
    binfmt_misc            17292  1 
    i2c_algo_bit           13199  1 i915
    video                  19115  1 i915
    mac_hid                13077  0 
    lp                     17455  0 
    parport                40930  3 parport_pc,ppdev,lp
    ums_realtek            17920  0 
    usb_storage            39646  1 ums_realtek
    r8169                  56396  0
    ifconfig -a gives:

    Code:
    eth0      Link encap:Ethernet  HWaddr 00:03:0d:ba:b3:fb  
              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:44 Base address:0x8000 
    
    
    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:1191 errors:0 dropped:0 overruns:0 frame:0
              TX packets:1191 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:88415 (88.4 KB)  TX bytes:88415 (88.4 KB)
    
    
    usb0      Link encap:Ethernet  HWaddr 02:1b:1b:03:0c:7a  
              inet addr:192.168.42.234  Bcast:192.168.42.255  Mask:255.255.255.0
              inet6 addr: fe80::1b:1bff:fe03:c7a/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:3237 errors:0 dropped:0 overruns:0 frame:0
              TX packets:3337 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:2099306 (2.0 MB)  TX bytes:686881 (686.8 KB)
    
    
    wlan0     Link encap:Ethernet  HWaddr 00:22:5f:48:2a:7c  
              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 Memory:f8458000-f8458100 
    
    
    wlan1     Link encap:Ethernet  HWaddr d8:eb:97:22:89:71  
              UP BROADCAST MULTICAST  MTU:1500  Metric:1
              RX packets:152 errors:0 dropped:1 overruns:0 frame:0
              TX packets:68 errors:0 dropped:26 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:23137 (23.1 KB)  TX bytes:10540 (10.5 KB)
    iwconfig gives:

    Code:
    lo        no wireless extensions.
    
    
    usb0      no wireless extensions.
    
    
    wlan1     unassociated  Nickname:"rtl_wifi"
              Mode:Managed  Access Point: Not-Associated   Sensitivity:0/0  
              Retry:off   RTS thr:off   Fragment thr:off
              Power Management:off
              Link Quality:0  Signal level:0  Noise level:0
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:0   Missed beacon:0
    
    
    wlan0     802.11b/g  Mode:Managed  Frequency=2.422 GHz  
              Access Point: Not-Associated   Bit Rate:11 Mb/s   
              Retry:on   RTS thr:off   Fragment thr:off
              Power Management:off
              Link Quality=0/100  Signal level=0 dBm  Noise level=0 dBm
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:0   Missed beacon:0
    
    
    eth0      no wireless extensions.
    cat /etc/resolv.conf gives:

    Code:
    # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
    #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
    nameserver 127.0.0.1
    iwlist chan gives:

    Code:
    lo        no frequency information.
    
    
    usb0      no frequency information.
    
    
    wlan1     14 channels in total; available frequencies :
              Channel 01 : 2.412 GHz
              Channel 02 : 2.417 GHz
              Channel 03 : 2.422 GHz
              Channel 04 : 2.427 GHz
              Channel 05 : 2.432 GHz
              Channel 06 : 2.437 GHz
              Channel 07 : 2.442 GHz
              Channel 08 : 2.447 GHz
              Channel 09 : 2.452 GHz
              Channel 10 : 2.457 GHz
              Channel 11 : 2.462 GHz
              Channel 12 : 2.467 GHz
              Channel 13 : 2.472 GHz
              Channel 14 : 2.484 GHz
    wlan0     14 channels in total; available frequencies :
              Channel 01 : 2.412 GHz
              Channel 02 : 2.417 GHz
              Channel 03 : 2.422 GHz
              Channel 04 : 2.427 GHz
              Channel 05 : 2.432 GHz
              Channel 06 : 2.437 GHz
              Channel 07 : 2.442 GHz
              Channel 08 : 2.447 GHz
              Channel 09 : 2.452 GHz
              Channel 10 : 2.457 GHz
              Channel 11 : 2.462 GHz
              Channel 12 : 2.467 GHz
              Channel 13 : 2.472 GHz
              Current Channel:3
    
    
    eth0      no frequency information.
    sudo iwlist scan gives:

    Code:
    lo        Interface doesn't support scanning.
    
    
    usb0      Interface doesn't support scanning.
    
    
    wlan1     Failed to read scan data : Invalid argument
    
    
    wlan0     No scan results
    
    
    eth0      Interface doesn't support scanning.
    C

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