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Thread: 11.04 wireless keeps dropping, Intel 6205

  1. #1
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    Jul 2008
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    11.04 wireless keeps dropping, Intel 6205

    Hi all,

    Weird problem. Every now and then, my wireless connection just stops working. The network manager applet says I'm connected, but nothing works. I can fix the problem if I click the applet and reconnect to the network I'm on, but the problem always comes back.

    This is very irritating and I've done a few things to try to fix it. First, I disabled power management for wlan0, which seems to have helped a bit, but the problem still exists. Secondly, I've tried the compat-wireless drivers and they don't seem to fix the problem.

    Right now, I'm back to the stock driver. I am not sure what kind of information or logs I can post to help you guys diagnose the problem. However, I will say that at home, I have two APs set up with the same SSID (one is a repeater), so that might cause the problem? I haven't really used my laptop for long periods of time outside of my house yet, but I have noticed the problem in other places as well.

    Please let me know what kind of information I could provide to help fix the problem. Here's my lspci and lsmod:

    Code:
    shayan@shayan-ThinkPad-T420:~$ lspci
    00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
    00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
    00:16.0 Communication controller: Intel Corporation 6 Series Chipset Family MEI Controller #1 (rev 04)
    00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
    00:1a.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
    00:1b.0 Audio device: Intel Corporation 6 Series Chipset Family High Definition Audio Controller (rev 04)
    00:1c.0 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 1 (rev b4)
    00:1c.1 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 2 (rev b4)
    00:1c.3 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 4 (rev b4)
    00:1c.4 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 5 (rev b4)
    00:1d.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
    00:1f.0 ISA bridge: Intel Corporation 6 Series Chipset Family LPC Controller (rev 04)
    00:1f.2 SATA controller: Intel Corporation 6 Series Chipset Family 6 port SATA AHCI Controller (rev 04)
    00:1f.3 SMBus: Intel Corporation 6 Series Chipset Family SMBus Controller (rev 04)
    03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34)
    0d:00.0 System peripheral: Ricoh Co Ltd Device e823 (rev 05)
    0d:00.3 FireWire (IEEE 1394): Ricoh Co Ltd FireWire Host Controller (rev 04)
    Code:
    shayan@shayan-ThinkPad-T420:~$ lsmod
    Module                  Size  Used by
    iwlagn                333717  0 
    iwlcore               167503  1 iwlagn
    mac80211              294370  2 iwlagn,iwlcore
    cfg80211              178528  3 iwlagn,iwlcore,mac80211
    cryptd                 20510  0 
    aes_x86_64             17208  0 
    aes_generic            38279  1 aes_x86_64
    binfmt_misc            17565  1 
    vboxnetadp             13382  0 
    vboxnetflt             28297  0 
    vboxdrv               264172  2 vboxnetadp,vboxnetflt
    parport_pc             36959  0 
    ppdev                  17113  0 
    snd_hda_codec_hdmi     28167  1 
    snd_hda_codec_conexant    57511  1 
    joydev                 17606  0 
    arc4                   12529  2 
    snd_hda_intel          33211  1 
    snd_hda_codec         103804  3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
    snd_hwdep              13604  1 snd_hda_codec
    uvcvideo               72195  0 
    videodev               82052  1 uvcvideo
    v4l2_compat_ioctl32    17078  1 videodev
    i915                  514975  3 
    snd_pcm                96391  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
    snd_seq_midi           13324  0 
    tpm_tis                18537  0 
    drm_kms_helper         42136  1 i915
    thinkpad_acpi          81587  0 
    snd_rawmidi            30486  1 snd_seq_midi
    psmouse                73535  0 
    snd_seq_midi_event     14899  1 snd_seq_midi
    nvram                  14419  1 thinkpad_acpi
    snd_seq                61621  2 snd_seq_midi,snd_seq_midi_event
    tpm                    22267  1 tpm_tis
    tpm_bios               13684  1 tpm
    snd_timer              29602  2 snd_pcm,snd_seq
    serio_raw              13166  0 
    drm                   227495  4 i915,drm_kms_helper
    snd_seq_device         14462  3 snd_seq_midi,snd_rawmidi,snd_seq
    i2c_algo_bit           13400  1 i915
    video                  19438  1 i915
    snd                    67382  13 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,thinkpad_acpi,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
    soundcore              12680  1 snd
    snd_page_alloc         18529  2 snd_hda_intel,snd_pcm
    lp                     17825  0 
    parport                46458  3 parport_pc,ppdev,lp
    coretemp               13490  0 
    ahci                   25951  3 
    libahci                26642  1 ahci
    sdhci_pci              13989  0 
    sdhci                  27387  1 sdhci_pci
    firewire_ohci          40370  0 
    firewire_core          62646  1 firewire_ohci
    crc_itu_t              12707  1 firewire_core
    e1000e                159096  0 
    shayan@shayan-ThinkPad-T420:~$

  2. #2
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    Ubuntu 12.10 Quantal Quetzal

    Re: 11.04 wireless keeps dropping, Intel 6205

    Quote Originally Posted by erans View Post
    Hi all,

    Weird problem. Every now and then, my wireless connection just stops working. The network manager applet says I'm connected, but nothing works. I can fix the problem if I click the applet and reconnect to the network I'm on, but the problem always comes back.

    This is very irritating and I've done a few things to try to fix it. First, I disabled power management for wlan0, which seems to have helped a bit, but the problem still exists. Secondly, I've tried the compat-wireless drivers and they don't seem to fix the problem.

    Right now, I'm back to the stock driver. I am not sure what kind of information or logs I can post to help you guys diagnose the problem. However, I will say that at home, I have two APs set up with the same SSID (one is a repeater), so that might cause the problem? I haven't really used my laptop for long periods of time outside of my house yet, but I have noticed the problem in other places as well.

    Please let me know what kind of information I could provide to help fix the problem. Here's my lspci and lsmod:

    Code:
    shayan@shayan-ThinkPad-T420:~$ lspci
    00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
    00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
    00:16.0 Communication controller: Intel Corporation 6 Series Chipset Family MEI Controller #1 (rev 04)
    00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
    00:1a.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
    00:1b.0 Audio device: Intel Corporation 6 Series Chipset Family High Definition Audio Controller (rev 04)
    00:1c.0 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 1 (rev b4)
    00:1c.1 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 2 (rev b4)
    00:1c.3 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 4 (rev b4)
    00:1c.4 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 5 (rev b4)
    00:1d.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
    00:1f.0 ISA bridge: Intel Corporation 6 Series Chipset Family LPC Controller (rev 04)
    00:1f.2 SATA controller: Intel Corporation 6 Series Chipset Family 6 port SATA AHCI Controller (rev 04)
    00:1f.3 SMBus: Intel Corporation 6 Series Chipset Family SMBus Controller (rev 04)
    03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34)
    0d:00.0 System peripheral: Ricoh Co Ltd Device e823 (rev 05)
    0d:00.3 FireWire (IEEE 1394): Ricoh Co Ltd FireWire Host Controller (rev 04)
    Code:
    shayan@shayan-ThinkPad-T420:~$ lsmod
    Module                  Size  Used by
    iwlagn                333717  0 
    iwlcore               167503  1 iwlagn
    mac80211              294370  2 iwlagn,iwlcore
    cfg80211              178528  3 iwlagn,iwlcore,mac80211
    cryptd                 20510  0 
    aes_x86_64             17208  0 
    aes_generic            38279  1 aes_x86_64
    binfmt_misc            17565  1 
    vboxnetadp             13382  0 
    vboxnetflt             28297  0 
    vboxdrv               264172  2 vboxnetadp,vboxnetflt
    parport_pc             36959  0 
    ppdev                  17113  0 
    snd_hda_codec_hdmi     28167  1 
    snd_hda_codec_conexant    57511  1 
    joydev                 17606  0 
    arc4                   12529  2 
    snd_hda_intel          33211  1 
    snd_hda_codec         103804  3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
    snd_hwdep              13604  1 snd_hda_codec
    uvcvideo               72195  0 
    videodev               82052  1 uvcvideo
    v4l2_compat_ioctl32    17078  1 videodev
    i915                  514975  3 
    snd_pcm                96391  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
    snd_seq_midi           13324  0 
    tpm_tis                18537  0 
    drm_kms_helper         42136  1 i915
    thinkpad_acpi          81587  0 
    snd_rawmidi            30486  1 snd_seq_midi
    psmouse                73535  0 
    snd_seq_midi_event     14899  1 snd_seq_midi
    nvram                  14419  1 thinkpad_acpi
    snd_seq                61621  2 snd_seq_midi,snd_seq_midi_event
    tpm                    22267  1 tpm_tis
    tpm_bios               13684  1 tpm
    snd_timer              29602  2 snd_pcm,snd_seq
    serio_raw              13166  0 
    drm                   227495  4 i915,drm_kms_helper
    snd_seq_device         14462  3 snd_seq_midi,snd_rawmidi,snd_seq
    i2c_algo_bit           13400  1 i915
    video                  19438  1 i915
    snd                    67382  13 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,thinkpad_acpi,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
    soundcore              12680  1 snd
    snd_page_alloc         18529  2 snd_hda_intel,snd_pcm
    lp                     17825  0 
    parport                46458  3 parport_pc,ppdev,lp
    coretemp               13490  0 
    ahci                   25951  3 
    libahci                26642  1 ahci
    sdhci_pci              13989  0 
    sdhci                  27387  1 sdhci_pci
    firewire_ohci          40370  0 
    firewire_core          62646  1 firewire_ohci
    crc_itu_t              12707  1 firewire_core
    e1000e                159096  0 
    shayan@shayan-ThinkPad-T420:~$
    Do you have Ubuntu or Kubuntu?

  3. #3
    Join Date
    Jul 2008
    Beans
    109

    Re: 11.04 wireless keeps dropping, Intel 6205

    Ubuntu

  4. #4
    Join Date
    May 2010
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    Re: 11.04 wireless keeps dropping, Intel 6205

    Could you give me the output of these Terminal commands?
    Code:
    sudo ifconfig
    sudo iwconfig
    sudo nm-tool
    sudo rfkill list all
    sudo iwlist scan

  5. #5
    Join Date
    Jul 2008
    Beans
    109

    Re: 11.04 wireless keeps dropping, Intel 6205

    Quote Originally Posted by lkjoel View Post
    Could you give me the output of these Terminal commands?
    Code:
    sudo ifconfig
    sudo iwconfig
    sudo nm-tool
    sudo rfkill list all
    sudo iwlist scan
    Code:
    sudo ifconfig
    [sudo] password for shayan: 
    eth0      Link encap:Ethernet  HWaddr 00:21:cc:61:dd:ad  
              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:20 Memory:f2600000-f2620000 
    
    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:2800 errors:0 dropped:0 overruns:0 frame:0
              TX packets:2800 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:279252 (279.2 KB)  TX bytes:279252 (279.2 KB)
    
    wlan0     Link encap:Ethernet  HWaddr a0:88:b4:67:ac:f0  
              inet addr:192.168.1.106  Bcast:192.168.1.255  Mask:255.255.255.0
              inet6 addr: fe80::a288:b4ff:fe67:acf0/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:62710 errors:0 dropped:0 overruns:0 frame:0
              TX packets:45490 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:73443576 (73.4 MB)  TX bytes:7663426 (7.6 MB)
    
    shayan@shayan-ThinkPad-T420:~$ sudo iwconfig
    lo        no wireless extensions.
    
    eth0      no wireless extensions.
    
    vboxnet0  no wireless extensions.
    
    wlan0     IEEE 802.11abgn  ESSID:"grvyrbrs"  
              Mode:Managed  Frequency:2.437 GHz  Access Point: 00:16:B6:DE:0D:AA   
              Bit Rate=54 Mb/s   Tx-Power=15 dBm   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
              Encryption key:(i removed this! --erans)
              Power Management:off
              Link Quality=58/70  Signal level=-52 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:2  Invalid misc:191   Missed beacon:0
    
    shayan@shayan-ThinkPad-T420:~$ sudo nm-
    nm-applet             nm-online             
    nm-connection-editor  nm-tool               
    shayan@shayan-ThinkPad-T420:~$ sudo nm-tool
    
    NetworkManager Tool
    
    State: connected
    
    - Device: eth0 -----------------------------------------------------------------
      Type:              Wired
      Driver:            e1000e
      State:             unavailable
      Default:           no
      HW Address:        00:21:CC:61:DD:AD
    
      Capabilities:
        Carrier Detect:  yes
    
      Wired Properties
        Carrier:         off
    
    
    - Device: wlan0  [Auto grvyrbrs] -----------------------------------------------
      Type:              802.11 WiFi
      Driver:            iwlagn
      State:             connected
      Default:           yes
      HW Address:        A0:88:B4:67:AC:F0
    
      Capabilities:
        Speed:           54 Mb/s
    
      Wireless Properties
        WEP Encryption:  yes
        WPA Encryption:  yes
        WPA2 Encryption: yes
    
      Wireless Access Points (* = current AP)
        Rayos Family's Network: Infra, 00:1E:52:7C:90:E3, Freq 2412 MHz, Rate 54 Mb/s, Strength 27 WPA WPA2
        *grvyrbrs:       Infra, 00:16:B6:DE:0D:AA, Freq 2437 MHz, Rate 54 Mb/s, Strength 88 WEP
        grvyrbrs:        Infra, 02:16:B6:BC:11:8E, Freq 2437 MHz, Rate 54 Mb/s, Strength 82 WEP
    
      IPv4 Settings:
        Address:         192.168.1.106
        Prefix:          24 (255.255.255.0)
        Gateway:         192.168.1.1
    
        DNS:             208.67.222.222
        DNS:             208.67.220.220
    
    
    shayan@shayan-ThinkPad-T420:~$ sudo rfkill list all
    8: phy0: Wireless LAN
    	Soft blocked: no
    	Hard blocked: no
    shayan@shayan-ThinkPad-T420:~$ sudo iwlist scan
    lo        Interface doesn't support scanning.
    
    eth0      Interface doesn't support scanning.
    
    vboxnet0  Interface doesn't support scanning.
    
    wlan0     Scan completed :
              Cell 01 - Address: 02:16:B6:BC:11:8E
                        Channel:6
                        Frequency:2.437 GHz (Channel 6)
                        Quality=56/70  Signal level=-54 dBm  
                        Encryption key:on
                        ESSID:"grvyrbrs"
                        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
                        Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                        Mode:Master
                        Extra:tsf=000000771f3f85fc
                        Extra: Last beacon: 5270ms ago
                        IE: Unknown: 00086772767972627273
                        IE: Unknown: 010882848B96A4B0C8EC
                        IE: Unknown: 030106
                        IE: Unknown: 2A0104
                        IE: Unknown: 2F0104
                        IE: Unknown: 32048C9298E0
                        IE: Unknown: DD090010180203F0000000
                        IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
              Cell 02 - Address: 00:16:B6:DE:0D:AA
                        Channel:6
                        Frequency:2.437 GHz (Channel 6)
                        Quality=67/70  Signal level=-43 dBm  
                        Encryption key:on
                        ESSID:"grvyrbrs"
                        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
                        Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                        Mode:Master
                        Extra:tsf=000000772132d183
                        Extra: Last beacon: 130ms ago
                        IE: Unknown: 00086772767972627273
                        IE: Unknown: 010882848B96A4B0C8EC
                        IE: Unknown: 030106
                        IE: Unknown: 2A0104
                        IE: Unknown: 2F0104
                        IE: Unknown: 32048C9298E0
                        IE: Unknown: DD09001018020015000000
    
    shayan@shayan-ThinkPad-T420:~$

  6. #6
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  7. #7
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    Lubuntu Development Release

    Re: 11.04 wireless keeps dropping, Intel 6205

    As strong as your wireless AP is I would turn that repeater off and see if it stabilized my wireless. Consider the strengths getting close to the same and network manager thinks it better switch to the now stronger signal.. I really don't know if that is happening but it can't be that hard to test.

    Since both have the same ESSID you can't make either the default auto.. and lock it to just one... I have no idea if you can change the ESSID on one say the repeater but maybe you could.
    Boot Info Script
    Ubuntu User number is # 32763
    Linux User number is # 527179

  8. #8
    Join Date
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    Ubuntu 14.04 Trusty Tahr

    Re: 11.04 wireless keeps dropping, Intel 6205

    Erans, have you solved the issue? I've just upgraded to 11.10 and I'm experiencing now exactly the same problem on my Thinkpad T420 with Intel centrino 6205.

    I know it's not my AP as I have a smooth reception on windows on the same computer.

    I just wonder why it's happening to me now with the new 3.0.0-12 kernel and not before under Natty...I'm even wondering if my post is relevant in this thread...

    Apparently, LP bug (https://bugs.launchpad.net/ubuntu/+s...er/+bug/836250) reports the issue but does not provide a solution.

  9. #9
    Join Date
    Jul 2008
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    109

    Re: 11.04 wireless keeps dropping, Intel 6205

    Sorry man, can't help--I moved out of the country for research and I'm in places that either don't have wifi or don't have a billion APs with the same SSID, so I can't do any testing.

    But to answer your question, I never resolved this issue under 11.04. Not sure if I still have it under 11.10.

  10. #10
    Join Date
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    Switzerland
    Beans
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    Ubuntu 14.04 Trusty Tahr

    Re: 11.04 wireless keeps dropping, Intel 6205

    Thanks for your answer Erans.
    In the mean time, I found a temporary solution, for those who might be interested. Check the LP but report (link in my previous post) and follow instructions in comment #42.
    I hope there will soon be an upstream fix though.

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