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Thread: intermittent wireless drop

  1. #1
    Join Date
    May 2009
    Beans
    2

    intermittent wireless drop

    Hello,

    I am new to Ubuntu, having just installed 9.0.4 (2.6.28-11-generic) on an HP G60-230US with an Atheros wireless adapter (AR928X). After I defined the wireless network, it connected to my wireless network, but the signal pickup was weak - about 50% at 30 feet, and only 85% at 5 feet - and the connection dropped after a period of activity. After the connection drops, it auto connects again after a minute or two ... cycle repeats until I get tired of it and revert to Vista. Under Vista the signal strength is almost 100% and I've never had any drops.

    My wireless lan is set to WPA2-PSK, no-broadcast of the ssid, and auto channel.

    I've checked some of the forums posts about intermittent connection problems, but the config of my system doesn't ever seem to completely match up with what was in the problem and/or resolution. I was tempted to try the windows driver work-around (ndiswrapper?), but thought I'd ask for advice first. Anyone have any ideas?

    Some data I collected is below (sorry if too much info, and someone please tell me if I've just published my hidden ssid and password for the whole world to see).

    Thanks in advance.


    /etc/network/interfaces

    auto lo
    iface lo inet loopback


    iwconfig output
    lo no wireless extensions.
    eth0 no wireless extensions.
    wmaster0 no wireless extensions.
    wlan0 IEEE 802.11abgn Mode:Managed Frequency:2.417 GHz
    Access Point: 00:11:22:8E:06:91 Bit Rate=1 Mb/s Tx-Power=20 dBm
    Retry min limit:7 RTS thr:off Fragment thr=2352 B
    Power Management:off
    Link Quality=42/100 Signal level:-89 dBm Noise level=-116 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:0 Invalid misc:0 Missed beacon:0
    pan0 no wireless extensions.


    lshw -C network output
    *-network
    description: Wireless interface
    product: AR928X Wireless Network Adapter (PCI-Express)
    vendor: Atheros Communications Inc.
    physical id: 0
    bus info: pci@0000:02:00.0
    logical name: wmaster0
    version: 01
    serial: 00:24:2b:ad:84:84
    width: 64 bits
    clock: 33MHz
    capabilities: bus_master cap_list logical ethernet physical wireless
    configuration: broadcast=yes driver=ath9k ip=192.168.1.6 latency=0 module=ath9k multicast=yes wireless=IEEE 802.11abgn


    iwlist scan output
    lo Interface doesn't support scanning.
    eth0 Interface doesn't support scanning.
    wmaster0 Interface doesn't support scanning.
    wlan0 Scan completed :
    Cell 01 - Address: 00:11:22:8E:06:91
    ESSID:""
    Mode:Master
    Channel:2
    Frequency:2.417 GHz (Channel 2)
    Quality=46/100 Signal level:-86 dBm Noise level=-116 dBm
    Encryption key:on
    IE: Unknown: 0000
    IE: Unknown: 010882848B960C121824
    IE: Unknown: 030102
    IE: Unknown: 050400010000
    IE: Unknown: 0706555320010B1B
    IE: Unknown: 200100
    IE: Unknown: 2A0100
    IE: IEEE 802.11i/WPA2 Version 1
    Group Cipher : CCMP
    Pairwise Ciphers (1) : CCMP
    Authentication Suites (1) : PSK
    IE: Unknown: 32043048606C
    IE: Unknown: DD180050F2020101020003A4000027A4000042435E0062322F 00
    IE: Unknown: DD1E00904C334C101BFFFF0000000000000000000000000000 00000000000000
    IE: Unknown: 2D1A4C101BFFFF000000000000000000000000000000000000 000000
    IE: Unknown: DD1A00904C3402080800000000000000000000000000000000 000000
    IE: Unknown: 3D1602080800000000000000000000000000000000000000
    IE: Unknown: DD0900037F01010000FF7F
    IE: Unknown: DD0A00037F04010000000000
    IE: Unknown: DD2C0050F204104A0001101044000101105700010010470010 565AA94967C14C0EAA8FF349E6F59311103C000103
    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
    9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
    48 Mb/s; 54 Mb/s
    Extra:tsf=000000caaed5b180
    Extra: Last beacon: 20ms ago
    pan0 Interface doesn't support scanning.


    lsmod output
    Module Size Used by
    nls_iso8859_1 12032 1
    nls_cp437 13696 1
    vfat 18816 1
    fat 58272 1 vfat
    aes_i586 15744 3
    aes_generic 35880 1 aes_i586
    i915 65540 2
    drm 96296 3 i915
    binfmt_misc 16776 1
    ppdev 15620 0
    bridge 56340 0
    stp 10500 1 bridge
    bnep 20224 2
    input_polldev 11912 0
    joydev 18368 0
    lp 17156 0
    parport 42220 2 ppdev,lp
    arc4 9856 2
    ecb 10752 2
    ath9k 263224 0
    snd_hda_intel 435636 2
    snd_pcm_oss 46336 0
    snd_mixer_oss 22656 1 snd_pcm_oss
    mac80211 217208 1 ath9k
    snd_pcm 82948 2 snd_hda_intel,snd_pcm_oss
    snd_seq_dummy 10756 0
    snd_seq_oss 37760 0
    snd_seq_midi 14336 0
    snd_rawmidi 29696 1 snd_seq_midi
    snd_seq_midi_event 15104 2 snd_seq_oss,snd_seq_midi
    snd_seq 56880 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_mid i_event
    cfg80211 38032 1 mac80211
    snd_timer 29704 2 snd_pcm,snd_seq
    snd_seq_device 14988 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi ,snd_seq
    uvcvideo 63240 0
    compat_ioctl32 9344 1 uvcvideo
    videodev 41600 1 uvcvideo
    v4l1_compat 21764 2 uvcvideo,videodev
    snd 62628 13 snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,sn d_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_de vice
    soundcore 15200 1 snd
    iTCO_wdt 19108 0
    psmouse 61972 0
    serio_raw 13316 0
    pcspkr 10496 0
    snd_page_alloc 16904 2 snd_hda_intel,snd_pcm
    iTCO_vendor_support 11652 1 iTCO_wdt
    led_class 12036 1 ath9k
    intel_agp 34108 1
    agpgart 42696 3 drm,intel_agp
    video 25360 0
    output 11008 1 video
    r8169 40836 0
    mii 13312 1 r8169
    usb_storage 82880 1
    fbcon 46112 0
    tileblit 10752 1 fbcon
    font 16384 1 fbcon
    bitblit 13824 1 fbcon
    softcursor 9984 1 bitblit


    lspci output
    00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
    00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
    00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
    00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
    00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
    00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
    00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
    00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
    00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
    00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
    00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
    00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
    00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
    00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
    00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
    00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03)
    00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03)
    00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
    00:1f.6 Signal processing controller: Intel Corporation 82801I (ICH9 Family) Thermal Subsystem (rev 03)
    01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
    02:00.0 Network controller: Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01)
    Last edited by fjohnson; May 19th, 2009 at 03:23 AM.

  2. #2
    Join Date
    May 2009
    Beans
    2

    Re: intermittent wireless drop

    Older posts with this type of problem have suggested trying Ndiswrapper, but that doesn't list 9.0.4 as a supported rev.

    Also, the old post suggest trying supplicant, but that seems to be built-in (in some fashion) to 9.0.4.

    Anyone have any ideas of things to try?

  3. #3
    Join Date
    May 2009
    Beans
    2

    Re: intermittent wireless drop

    hi friends these are information mostly useful for me. Thanks for sharing us. If they are all doing after problem is not solved.. What are doing that situation. If you have any suggestion then share with us. I wait for a positive response. Thanks

  4. #4
    Join Date
    Mar 2009
    Location
    Helsinki, Finland
    Beans
    650
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: intermittent wireless drop

    Looks like it's a temporary setback for the ath9k, see here for more info.

    Anyway, you can go ahead and try NDISWrapper, it does work on 9.04. Just have to find those windows drivers though. And another option is to try the Madwifi (ath_pci) driver that you can download from here, although I'm not 100% sure if it supports your chip.

  5. #5
    Join Date
    Aug 2008
    Beans
    18

    Re: intermittent wireless drop

    I had the same problem with my Ubuntu 8.10 previously.
    Then I just found out that by setting my router to broadcast only G signal it fixed the intermitten drop issue.

    Now everything looks OK with me.
    So my suggestion is set your router signal to the ones that you will be using only.

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