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Thread: My wireless internet connection keeps failing to connect

  1. #1
    Join Date
    Apr 2013
    Beans
    7

    My wireless internet connection keeps failing to connect

    I get on the internet and it is fine for a period of time. Eventually the wireless connection will drop. While I can still see the connections it won't allow me to reconnect. I've found by removing the network adapter (belkin n100) and plugging it back in it will connect again. Also restarting the computer had the same effect. Though lately it has a tendency to only stay on for a minute or two. This shorter time periods seem to happen more later in the afternoon and into the night.

    I'm using Ubuntu 12.04

  2. #2
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    6,489
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: My wireless internet connection keeps failing to connect

    Please show the terminal outputs of these commands:
    Code:
    lsusb
    lsmod
    ifconfig -a
    iwconfig
    sudo iwlist scan

  3. #3
    Join Date
    Apr 2013
    Beans
    7

    Re: My wireless internet connection keeps failing to connect

    dadalama@dadalama-System-Product-Name:~$ 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 001 Device 009: ID 050d:945a Belkin Components F7D1101 Basic Wireless USB Adapter v1000 [Realtek RTL8188SU]
    Bus 001 Device 003: ID 2080:0001 Barnes & Noble nook
    Bus 002 Device 002: ID 046d:0804 Logitech, Inc. Webcam C250
    Bus 004 Device 002: ID 046d:c312 Logitech, Inc. DeLuxe 250 Keyboard
    Bus 004 Device 003: ID 046d:c044 Logitech, Inc. LX3 Optical Mouse
    dadalama@dadalama-System-Product-Name:~$ lsmod
    Module Size Used by
    nls_iso8859_1 12713 1
    nls_cp437 16991 1
    vfat 17585 1
    fat 61512 1 vfat
    snd_hrtimer 12744 1
    rfcomm 47604 0
    bnep 18281 2
    bluetooth 180153 10 rfcomm,bnep
    binfmt_misc 17540 1
    snd_hda_codec_via 51474 1
    r8712u 189646 0
    ppdev 17113 0
    snd_hda_intel 33719 4
    snd_hda_codec 127706 2 snd_hda_codec_via,snd_hda_intel
    snd_usb_audio 122982 1
    snd_pcm 97275 4 snd_hda_intel,snd_hda_codec,snd_usb_audio
    uvcvideo 72627 0
    videodev 98259 1 uvcvideo
    v4l2_compat_ioctl32 17128 1 videodev
    snd_hwdep 17764 2 snd_hda_codec,snd_usb_audio
    snd_usbmidi_lib 29476 1 snd_usb_audio
    snd_seq_midi 13324 0
    snd_rawmidi 30748 2 snd_usbmidi_lib,snd_seq_midi
    usbhid 47238 0
    hid 99636 1 usbhid
    snd_seq_midi_event 14899 1 snd_seq_midi
    edac_core 53746 0
    snd_seq 61929 3 snd_seq_midi,snd_seq_midi_event
    k10temp 13166 0
    snd_timer 29990 3 snd_hrtimer,snd_pcm,snd_seq
    snd_seq_device 14540 3 snd_seq_midi,snd_rawmidi,snd_seq
    edac_mce_amd 23709 0
    psmouse 97485 0
    snd 79041 21 snd_hda_codec_via,snd_hda_intel,snd_hda_codec,snd_ usb_audio,snd_pcm,snd_hwdep,snd_usbmidi_lib,snd_ra wmidi,snd_seq,snd_timer,snd_seq_device
    nvidia 9367655 38
    serio_raw 13211 0
    sp5100_tco 13791 0
    soundcore 15091 1 snd
    asus_atk0110 18078 0
    parport_pc 32866 1
    i2c_piix4 13301 0
    snd_page_alloc 18529 2 snd_hda_intel,snd_pcm
    mac_hid 13253 0
    wmi 19256 0
    lp 17799 0
    parport 46562 3 ppdev,parport_pc,lp
    usb_storage 49198 1
    floppy 70207 0
    pata_atiixp 13204 0
    r8169 62154 0
    dadalama@dadalama-System-Product-Name:~$ ifconfig -a
    eth0 Link encap:Ethernet HWaddr 00:24:8c:d1:1c:7e
    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:43 Base address:0xe000

    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:52722 errors:0 dropped:0 overruns:0 frame:0
    TX packets:52722 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:4110576 (4.1 MB) TX bytes:4110576 (4.1 MB)

    wlan0 Link encap:Ethernet HWaddr 08:86:3b:23:be:48
    inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
    inet6 addr: fe80::a86:3bff:fe23:be48/64 Scope:Link
    UP BROADCAST MULTICAST MTU:1500 Metric:1
    RX packets:655 errors:0 dropped:19 overruns:0 frame:0
    TX packets:706 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:463400 (463.4 KB) TX bytes:121605 (121.6 KB)

    dadalama@dadalama-System-Product-Name:~$ iwconfig
    lo no wireless extensions.

    wlan0 unassociated Nickname:"rtl_wifi"
    Mode:Managed Access Point: Not-Associated Sensitivity:0/0
    Retryff RTS thrff Fragment thrff
    Power Managementff
    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

    eth0 no wireless extensions.

    dadalama@dadalama-System-Product-Name:~$ sudo iwlist scan
    [sudo] password for dadalama:
    lo Interface doesn't support scanning.

    wlan0 No scan results

    eth0 Interface doesn't support scanning.

  4. #4
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    6,489
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: My wireless internet connection keeps failing to connect

    Try to update the driver:
    Code:
    sudo apt-get install --reinstall linux-headers-$(uname -r) linux-headers-generic build-essential dkms
    wget http://media.cdn.ubuntu-de.org/forum/attachments/35/41/2844083-rtl8712u-2.6.6.0.2_dkms.tar.gz
    sudo tar xvf 2844083-rtl8712u-2.6.6.0.2_dkms.tar.gz -C /usr/src
    sudo dkms add -m rtl8712u -v 2.6.6.0.2
    sudo dkms build -m rtl8712u -v 2.6.6.0.2
    sudo dkms install -m rtl8712u -v 2.6.6.0.2
    echo "blacklist r8712u" | sudo tee -a /etc/modprobe.d/blacklist.conf
    Reboot and check:
    Code:
    iwconfig
    lsmod | egrep 'r81|8712'

  5. #5
    Join Date
    Apr 2013
    Beans
    7

    Re: My wireless internet connection keeps failing to connect

    dadalama@dadalama-System-Product-Name:~$ iwconfig
    lo no wireless extensions.

    wlan0 IEEE 802.11bg ESSID:"Bradshaw's" Nickname:"rtl_wifi"
    Mode:Managed Frequency:2.462 GHz Access Point: 00:24:B2:7F:4E:F4
    Bit Rate:54 Mb/s Sensitivity:0/0
    Retryff RTS thrff Fragment thrff
    Power Managementff
    Link Quality=100/100 Signal level=70/100 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

    eth0 no wireless extensions.

    dadalama@dadalama-System-Product-Name:~$ lsmod | egrep 'r81|8712'


    thanks for the help I'll let you know if it keeps dropping

  6. #6
    Join Date
    Apr 2013
    Beans
    7

    Re: My wireless internet connection keeps failing to connect

    It got worse
    It started kicking and forcing me to reinsert the network adapter every few seconds, now it's stable but I don't know for how long...

  7. #7
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    6,489
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: My wireless internet connection keeps failing to connect

    Check:
    Code:
    lsmod
    ifconfig -a
    cat /etc/resolv.conf
    route -n
    sudo iwlist scan

  8. #8
    Join Date
    Apr 2013
    Beans
    7

    Re: My wireless internet connection keeps failing to connect

    dadalama@dadalama-System-Product-Name:~$ lsmod
    Module Size Used by
    nls_iso8859_1 12713 1
    nls_cp437 16991 1
    vfat 17585 1
    fat 61512 1 vfat
    snd_hrtimer 12744 1
    rfcomm 47604 0
    bnep 18281 2
    bluetooth 180153 10 rfcomm,bnep
    binfmt_misc 17540 1
    snd_hda_codec_via 51474 1
    snd_hda_intel 33719 3
    snd_hda_codec 127706 2 snd_hda_codec_via,snd_hda_intel
    snd_usb_audio 122982 1
    snd_pcm 97275 3 snd_hda_intel,snd_hda_codec,snd_usb_audio
    ppdev 17113 0
    snd_hwdep 17764 2 snd_hda_codec,snd_usb_audio
    snd_usbmidi_lib 29476 1 snd_usb_audio
    r8712u 189646 0
    snd_seq_midi 13324 0
    snd_seq_midi_event 14899 1 snd_seq_midi
    snd_rawmidi 30748 2 snd_usbmidi_lib,snd_seq_midi
    snd_seq 61929 3 snd_seq_midi,snd_seq_midi_event
    snd_timer 29990 3 snd_hrtimer,snd_pcm,snd_seq
    uvcvideo 72627 0
    videodev 98259 1 uvcvideo
    snd_seq_device 14540 3 snd_seq_midi,snd_rawmidi,snd_seq
    v4l2_compat_ioctl32 17128 1 videodev
    snd 79041 20 snd_hda_codec_via,snd_hda_intel,snd_hda_codec,snd_ usb_audio,snd_pcm,snd_hwdep,snd_usbmidi_lib,snd_ra wmidi,snd_seq,snd_timer,snd_seq_device
    usbhid 47238 0
    sp5100_tco 13791 0
    hid 99636 1 usbhid
    psmouse 97485 0
    edac_core 53746 0
    i2c_piix4 13301 0
    soundcore 15091 1 snd
    serio_raw 13211 0
    k10temp 13166 0
    edac_mce_amd 23709 0
    snd_page_alloc 18529 2 snd_hda_intel,snd_pcm
    parport_pc 32866 1
    asus_atk0110 18078 0
    nvidia 9367655 38
    mac_hid 13253 0
    wmi 19256 0
    lp 17799 0
    parport 46562 3 ppdev,parport_pc,lp
    usb_storage 49198 1
    pata_atiixp 13204 0
    floppy 70207 0
    r8169 62154 0
    dadalama@dadalama-System-Product-Name:~$ ifconfig -a
    eth0 Link encap:Ethernet HWaddr 00:24:8c:d1:1c:7e
    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:43 Base address:0xe000

    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:1287 errors:0 dropped:0 overruns:0 frame:0
    TX packets:1287 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:92296 (92.2 KB) TX bytes:92296 (92.2 KB)

    wlan0 Link encap:Ethernet HWaddr 08:86:3b:23:be:48
    inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
    inet6 addr: fe80::a86:3bff:fe23:be48/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:5025 errors:0 dropped:96 overruns:0 frame:0
    TX packets:4523 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:4685325 (4.6 MB) TX bytes:890628 (890.6 KB)

    dadalama@dadalama-System-Product-Name:~$ cat /etc/resolv.conf
    # 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
    dadalama@dadalama-System-Product-Name:~$ route -n
    Kernel IP routing table
    Destination Gateway Genmask Flags Metric Ref Use Iface
    0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0
    169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0
    192.168.1.0 0.0.0.0 255.255.255.0 U 2 0 0 wlan0
    dadalama@dadalama-System-Product-Name:~$ sudo iwlist scan
    [sudo] password for dadalama:
    lo Interface doesn't support scanning.

    wlan0 Scan completed :
    Cell 01 - Address: 00:24:B2:7F:4E:F4
    ESSID:"Bradshaw's"
    Protocol:IEEE 802.11bg
    Mode:Master
    Frequency:2.462 GHz (Channel 11)
    Encryption keyn
    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
    24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
    12 Mb/s; 48 Mb/s
    Signal level=100/100
    Cell 02 - Address: EC:1A:59:49:19:60
    ESSID:"belkin.960"
    Protocol:IEEE 802.11bgn
    Mode:Master
    Frequency:2.412 GHz (Channel 1)
    Encryption keyn
    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
    24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
    12 Mb/s; 48 Mb/s
    Extra:rsn_ie=30140100000fac040100000fac040100000fa c020000
    IE: IEEE 802.11i/WPA2 Version 1
    Group Cipher : CCMP
    Pairwise Ciphers (1) : CCMP
    Authentication Suites (1) : PSK
    IE: Unknown: DD9D0050F204104A00011010440001021041000100103B0001 031047001000000000000000010003EC1A5949196010210012 42656C6B696E20436F72706F726174696F6E1023000946394B 31303032763410240007342E30302E30371042000E31323132 333947433432383830381054000800060050F2040001101100 1B42656C6B696E20576972656C65737320526F757465722857 464129100800020080
    Signal level=100/100
    Cell 03 - Address: 74:44:01:F2:27:76
    ESSID:"karpowecz"
    Protocol:IEEE 802.11bgn
    Mode:Master
    Frequency:2.437 GHz (Channel 6)
    Encryption keyn
    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
    24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
    12 Mb/s; 48 Mb/s
    IE: Unknown: DD0E0050F204104A0001101044000102
    Signal level=72/100
    Cell 04 - Address: E0:91:F5:60:EC0
    ESSID:"fofybrit"
    Protocol:IEEE 802.11bgn
    Mode:Master
    Frequency:2.437 GHz (Channel 6)
    Encryption keyn
    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
    24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
    12 Mb/s; 48 Mb/s
    Extra:wpa_ie=dd1c0050f20101000050f20202000050f2040 050f20201000050f2020c00
    IE: WPA Version 1
    Group Cipher : TKIP
    Pairwise Ciphers (2) : CCMP TKIP
    Authentication Suites (1) : PSK
    Extra:rsn_ie=30180100000fac020200000fac04000fac020 100000fac020c00
    IE: IEEE 802.11i/WPA2 Version 1
    Group Cipher : TKIP
    Pairwise Ciphers (2) : CCMP TKIP
    Authentication Suites (1) : PSK
    IE: Unknown: DD7C0050F204104A00011010440001021041000100103B0001 031047001088A48572B188CF6E7688D36A0FDC68F01021000D 4E4554474541522C20496E632E10230009574E523230303076 3210240009574E523230303076321042000230311054000800 060050F204000110110009574E523230303076321008000200 84
    Signal level=46/100
    Cell 05 - Address: C4:3D:C7:3A:6F:7B
    ESSID:"Salas"
    Protocol:IEEE 802.11bgn
    Mode:Master
    Frequency:2.462 GHz (Channel 11)
    Encryption keyn
    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
    24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
    12 Mb/s; 48 Mb/s
    Signal level=46/100

    eth0 Interface doesn't support scanning.

    dadalama@dadalama-System-Product-Name:~$

  9. #9
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    6,489
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: My wireless internet connection keeps failing to connect

    Try WPA2-AES (CCMP) encryption instead of (unsecure) WEP. Did you install the driver?

  10. #10
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    16,073
    Distro
    Ubuntu Mate 16.04 Xenial Xerus

    Re: My wireless internet connection keeps failing to connect

    Please use code tags - if you are using New Reply button - highlight text and use the # button in the text box header.

    If using Quick Reply then [code] at the beginning and [/code] at the end.

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