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Thread: Wifi drops out but says connected on Intel 5100 in 12.04.1 LTS

  1. #1
    Join Date
    Jan 2013
    Beans
    4

    Wifi drops out but says connected on Intel 5100 in 12.04.1 LTS

    I am running 12.04.1 LTS off of a bootable USB drive with 4GB persistent file system. On a fresh install the wireless will work as soon as I enter the password. After some time (sometimes a while 45+ minutes and sometimes just a few minutes) the connection will no longer work. The connection info will show no difference between it working and not.
    After a reboot, the connection info will say that it is connected, but the connection is in fact not working.

    I've found a similar issue in these forums that recommend the following series of commands:
    Code:
    echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf
    sudo modprobe -rfv iwlwifi
    sudo modprobe -v iwlwifi
    This series of commands will consistently get my connection working once per boot (if this got the connection working again, but then it drops out another time, re-entering the commands does not seem to consistently work a second time and I need to reboot).

    1 Dell studio 1555 laptop
    2 Intel Corp Wifi Link 5100
    3 ifconfig :
    Code:
    Link encap:Ethernet  HWaddr 00:22:fb:a6:fb:94  
              inet addr:10.0.0.2  Bcast:10.0.0.255  Mask:255.255.255.0
              inet6 addr: fe80::222:fbff:fea6:fb94/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:54 errors:0 dropped:0 overruns:0 frame:0
              TX packets:259 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:5114 (5.1 KB)  TX bytes:31459 (31.4 KB)
    iwconfig:
    Code:
    wlan1     IEEE 802.11abg  ESSID:"HOME-BB62"  
              Mode:Managed  Frequency:2.437 GHz  Access Point: 00:1D:D1:35:BB:60   
              Bit Rate=54 Mb/s   Tx-Power=15 dBm   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
              Power Management:off
              Link Quality=68/70  Signal level=-42 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:0   Missed beacon:0
    4 lsmod:
    Code:
    Module                  Size  Used by
    dm_crypt               22528  0 
    arc4                   12473  2 
    snd_hda_codec_hdmi     31775  1 
    iwlwifi               291907  0 
    snd_hda_codec_idt      60251  1 
    snd_hda_intel          32765  5 
    snd_hda_codec         109562  3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
    snd_hwdep              13276  1 snd_hda_codec
    mac80211              436455  1 iwlwifi
    snd_pcm                80845  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
    snd_seq_midi           13132  0 
    snd_rawmidi            25424  1 snd_seq_midi
    r852                   17901  0 
    cfg80211              178679  2 iwlwifi,mac80211
    sm_common              16737  1 r852
    snd_seq_midi_event     14475  1 snd_seq_midi
    nand                   49667  2 r852,sm_common
    snd_seq                51567  2 snd_seq_midi,snd_seq_midi_event
    nand_ids                8547  1 nand
    snd_timer              28931  2 snd_pcm,snd_seq
    snd_seq_device         14172  3 snd_seq_midi,snd_rawmidi,snd_seq
    mtd                    35584  2 sm_common,nand
    nand_bch               13003  1 nand
    bch                    21757  1 nand_bch
    snd                    62064  20 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
    nand_ecc               13070  1 nand
    uvcvideo               67203  0 
    r592                   17808  0 
    soundcore              14635  1 snd
    btusb                  17912  2 
    snd_page_alloc         14108  2 snd_hda_intel,snd_pcm
    memstick               15857  1 r592
    videodev               86588  1 uvcvideo
    psmouse                72919  0 
    joydev                 17393  0 
    parport_pc             32114  0 
    dell_wmi               12601  0 
    dell_laptop            17767  0 
    mac_hid                13077  0 
    ppdev                  12849  0 
    serio_raw              13027  0 
    sparse_keymap          13658  1 dell_wmi
    bnep                   17830  2 
    dcdbas                 14098  1 dell_laptop
    rfcomm                 38139  12 
    lp                     17455  0 
    parport                40930  3 parport_pc,ppdev,lp
    bluetooth             158438  23 btusb,bnep,rfcomm
    dm_multipath           22710  0 
    ext2                   67987  1 
    squashfs               36095  1 
    overlayfs              27511  1 
    nls_iso8859_1          12617  1 
    nls_cp437              12751  1 
    vfat                   17308  1 
    fat                    55605  1 vfat
    dm_raid45              76451  0 
    xor                    25987  1 dm_raid45
    dm_mirror              21822  0 
    dm_region_hash         16065  1 dm_mirror
    dm_log                 18193  3 dm_raid45,dm_mirror,dm_region_hash
    btrfs                 638208  0 
    zlib_deflate           26622  1 btrfs
    libcrc32c              12543  1 btrfs
    usbhid                 41906  0 
    hid                    77367  1 usbhid
    radeon                737789  3 
    firewire_ohci          40172  0 
    sdhci_pci              18324  0 
    sdhci                  28241  1 sdhci_pci
    firewire_core          56906  1 firewire_ohci
    crc_itu_t              12627  1 firewire_core
    ttm                    65344  1 radeon
    tg3                   141369  0 
    drm_kms_helper         45466  1 radeon
    drm                   197692  5 radeon,ttm,drm_kms_helper
    usb_storage            39646  1 
    wmi                    18744  1 dell_wmi
    video                  19068  0 
    i2c_algo_bit           13199  1 radeon
    5 dmesg | grep wlan1:
    Code:
    [   67.486042] udevd[2575]: renamed network interface wlan0 to wlan1
    [   67.667008] ADDRCONF(NETDEV_UP): wlan1: link is not ready
    [   67.667261] ADDRCONF(NETDEV_UP): wlan1: link is not ready
    [   77.547260] wlan1: authenticate with 00:1d:d1:35:bb:60 (try 1)
    [   77.549910] wlan1: authenticated
    [   77.554667] wlan1: associate with 00:1d:d1:35:bb:60 (try 1)
    [   77.561236] wlan1: RX AssocResp from 00:1d:d1:35:bb:60 (capab=0xc11 status=0 aid=1)
    [   77.561240] wlan1: associated
    [   77.566193] ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
    [   88.240021] wlan1: no IPv6 routers present
    6 sudo lshw -C network:
    Code:
     *-network               
           description: Wireless interface
           product: WiFi Link 5100
           vendor: Intel Corporation
           physical id: 0
           bus info: pci@0000:04:00.0
           logical name: wlan1
           version: 00
           serial: 00:22:fb:a6:fb:94
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
           configuration: broadcast=yes driver=iwlwifi driverversion=3.2.0-29-generic-pae firmware=8.83.5.1 build 33692 ip=10.0.0.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11abg
           resources: irq:49 memory:f8000000-f8001fff
      *-network
           description: Ethernet interface
           product: NetLink BCM5784M Gigabit Ethernet PCIe
           vendor: Broadcom Corporation
           physical id: 0
           bus info: pci@0000:08:00.0
           logical name: eth0
           version: 10
           serial: 00:26:b9:01:e1:08
           capacity: 1Gbit/s
           width: 64 bits
           clock: 33MHz
           capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
           configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.121 firmware=sb v2.17 latency=0 link=no multicast=yes port=twisted pair
           resources: irq:50 memory:fc100000-fc10ffff
    7 iwlist scan:
    Code:
     lo        Interface doesn't support scanning.
    
    wlan1     Scan completed :
              Cell 01 - Address: 00:1D:D1:35:BB:60
                        Channel:6
                        Frequency:2.437 GHz (Channel 6)
                        Quality=69/70  Signal level=-41 dBm  
                        Encryption key:on
                        ESSID:"HOME-BB62"
                        Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                                  18 Mb/s; 36 Mb/s; 54 Mb/s
                        Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                        Mode:Master
                        Extra:tsf=000000494c902145
                        Extra: Last beacon: 50604ms ago
                        IE: Unknown: 0009484F4D452D42423632
                        IE: Unknown: 010882848B961224486C
                        IE: Unknown: 030106
                        IE: Unknown: 2A0106
                        IE: Unknown: 32040C183060
                        IE: Unknown: 2D1A0C0016FFFF0000000000000000000000000000000C0000000000
                        IE: Unknown: 3D1606000100000000000000000000000000000000000000
                        IE: Unknown: 3E0100
                        IE: WPA Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : TKIP CCMP
                            Authentication Suites (1) : PSK
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : TKIP CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
                        IE: Unknown: 0B05000025127A
                        IE: Unknown: 7F0101
                        IE: Unknown: DD07000C4307000000
                        IE: Unknown: 0706555320010B10
                        IE: Unknown: DD7D0050F204104A0001101044000102103B000103104700102880288028801880A880001DD135BB6010210005415252495310230006544738363247102400065254323836301042000831323334353637381054000800060050F204000110110012415252495320544738363220526F75746572100800020084103C000101
    
    eth0      Interface doesn't support scanning.
    8 lsb_release -d:
    Code:
    Description:    Ubuntu 12.04.1 LTS
    9 uname -mr:
    Code:
     3.2.0-29-generic-pae i686
    10 sudo /etc/init.d/networking restart:
    Code:
      * Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces
     * Reconfiguring network interfaces...                                   [ OK ]
    Any help or explanation of what I am doing (wrong) or any decent explanation of anything really is greatly appreciated.

    Thank you
    -c

  2. #2
    Join Date
    Jul 2005
    Beans
    2,050

    Re: Wifi drops out but says connected on Intel 5100 in 12.04.1 LTS

    It looks like you're not using the latest kernel available - ? Have you tried updating it to latest in the repository?

    I am using a 5100 card in a couple of Dell laptops with Ubuntu 12.04.1 and have had no connections issues at all with them (one install is a 32 bit, one is 64 bit). In fact, I don't have to disable 802.11n speeds - I get good local transfer rates on my network. I'm using an 802.11n Asus router with DD-WRT, WPA2 Personal, AES. What kind of router are you connected to?

  3. #3
    Join Date
    Jan 2013
    Beans
    3

    Re: Wifi drops out but says connected on Intel 5100 in 12.04.1 LTS

    you may not even have a linux issue. Have you changed your channels at all? are you losing connection on a hard wire? are you on a cisco router?

  4. #4
    Join Date
    Jan 2013
    Beans
    4

    Re: Wifi drops out but says connected on Intel 5100 in 12.04.1 LTS

    I dont think it is an issue with any of my hardware as when I boot into windows 7 my wifi connection works flawlessly.

    My modem/router is a comcast/xfinity Arris TG862G/GT model

    How would I update my kernel?

  5. #5
    Join Date
    Jul 2005
    Beans
    2,050

    Re: Wifi drops out but says connected on Intel 5100 in 12.04.1 LTS

    In Ubuntu, kernel updates are pushed with regular updates. If you look at updates listed in Update Manager, you'll probably see a couple related to the kernel. Or you can just do all updates and that should nail it.

    I have seen issues with routers where wireless worked fine with Windows but not with Linux. One issue used to be WiFi Protected Setup; I always disable that in my routers, anyway, but I have seen cases where WPS messed up Linux connections. But that was a couple of years ago.

    I will say that I have used my Dell laptop with 5100 wireless card on dozens of WiFi hot spots over the years in coffee shops, airports, etc. and have never had a problem I can recall since I started with 10.04 LTS and not since a more recent change to 12.04 LTS. I get great connection speeds, solid connections, no real issues.

  6. #6
    Join Date
    Jan 2013
    Beans
    4

    Re: Wifi drops out but says connected on Intel 5100 in 12.04.1 LTS

    With a wired connection (after it failed when 2/3rds done on my wireless connection) I performed all updates. Following the post-update reboot, the same problem was present. I tried the series of commands I mentioned in my first post:
    Code:
    echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf
    sudo modprobe -rfv iwlwifi
    sudo modprobe -v iwlwifi
    but this time, it had bad results. Upon entering the third command I got a fatal error and my network list emptied:


    Code:
    ubuntu@ubuntu:~$ echo "options iwlwifi 11n_disable" | sudo tee /etc/modprobe.d/iwlwifi.conf
    options iwlwifi 11n_disable
    ubuntu@ubuntu:~$ sudo modprobe -rfv iwlwifi
    rmmod /lib/modules/3.2.0-29-generic-pae/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
    rmmod /lib/modules/3.2.0-29-generic-pae/kernel/net/mac80211/mac80211.ko
    rmmod /lib/modules/3.2.0-29-generic-pae/kernel/net/wireless/cfg80211.ko
    ubuntu@ubuntu:~$ sudo modprobe -v iwlwifi
    insmod /lib/modules/3.2.0-29-generic-pae/kernel/net/wireless/cfg80211.ko 
    insmod /lib/modules/3.2.0-29-generic-pae/kernel/net/mac80211/mac80211.ko 
    insmod /lib/modules/3.2.0-29-generic-pae/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko 11n_disable
    FATAL: Error inserting iwlwifi (/lib/modules/3.2.0-29-generic-pae/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko): Invalid argument
    Any ideas?
    Anyone?
    Any help is greatly appreciated. I really want to get this sorted out but I dont even know what I'm looking at or where to begin.

    Thanks again.

  7. #7
    Join Date
    Jul 2005
    Beans
    2,050

    Re: Wifi drops out but says connected on Intel 5100 in 12.04.1 LTS

    You have show options listed two different ways - what did you actually put in the modprobe conf file?

    This is correct:

    Code:
    options iwlwifi 11n_disable=1
    This below is invalid:

    Code:
    options iwlwifi 11n_disable
    Forget about the tee. Just open the file and edit it properly. In a terminal type:

    Code:
    gksu gedit /etc/modprobe.d/iwlwifi.conf
    and set the options correctly.

    Also, I see errors in "3.2.0-29" kernel. That indicates that you didn't reboot after the update or didn't do all the updates? You should be on 3.2.0-36 . 29 is the old one .
    Last edited by ahallubuntu; January 30th, 2013 at 05:45 AM.

  8. #8
    Join Date
    Jul 2005
    Beans
    2,050

    Re: Wifi drops out but says connected on Intel 5100 in 12.04.1 LTS

    I want to point out again that I have four laptops (myself + family/friends) using this 5100 card running 12.04 (three Dells, one Acer) and I have not needed this option to disable 802.11n . I get great wireless N connections all the time. I use my primary laptop on numerous access points of all types and never wireless problems.

    But, it is worth a try if you are having problems.

  9. #9
    Join Date
    Feb 2013
    Beans
    1

    Unhappy Wifi drops out but says connected on Intel 5100 in 12.10

    I have also this problem, Asus M50VC intel 5100 Ubuntu 12.10
    17.02.2013

    iwconfig show always: Bit Rate=1 Mb/s
    even if I’m standing near router
    connections freeze o_O
    Last edited by 452; February 17th, 2013 at 05:02 PM.

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