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Hello, I use my laptop (with Ubuntu Netbook Remix) in a public place. Same laptop, same place (precisely all saturdays morning and even same table...). However some days the wireless ...
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  1. #1
    Linux Newbie
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    wireless DHCPDISCOVER : failure ..sometimes..


    Hello,

    I use my laptop (with Ubuntu Netbook Remix) in a public place.
    Same laptop, same place (precisely all saturdays morning and even same table...).

    However some days the wireless will never connect, whatever I tried to re-start ..etc..
    This happens around once per month.
    And the week after it'll connect and work immediately.

    Can this be link to the wireless router ?
    DHCP leasing or other ?

    I found following logging wireless ..etc.. in daemon.log about dhcpdiscover and networkmanager :

    ....
    Jun 5 10:31:11 eeepc avahi-daemon[2817]: Registering new address record for fe80::215:afff:feb6:6b6e on wlan0.*.
    Jun 5 10:31:12 eeepc NetworkManager: <info> (wlan0): supplicant connection state: scanning -> associating
    Jun 5 10:31:12 eeepc NetworkManager: <info> (wlan0): supplicant connection state: associating -> associated
    Jun 5 10:31:12 eeepc NetworkManager: <info> (wlan0): supplicant connection state: associated -> completed
    Jun 5 10:31:12 eeepc NetworkManager: <info> Activation (wlan0/wireless) Stage 2 of 5 (Device Configure) successful. Connected to wireless network 'EXKiGARE1'.
    Jun 5 10:31:12 eeepc NetworkManager: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) scheduled.
    Jun 5 10:31:12 eeepc NetworkManager: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) started...
    Jun 5 10:31:12 eeepc NetworkManager: <info> (wlan0): device state change: 5 -> 7
    Jun 5 10:31:12 eeepc NetworkManager: <info> Activation (wlan0) Beginning DHCP transaction.
    Jun 5 10:31:12 eeepc dhclient: Internet Systems Consortium DHCP Client V3.1.1
    Jun 5 10:31:12 eeepc dhclient: Copyright 2004-2008 Internet Systems Consortium.
    Jun 5 10:31:12 eeepc dhclient: All rights reserved.
    Jun 5 10:31:12 eeepc dhclient: For info, please visit DHCP | Internet Systems Consortium
    Jun 5 10:31:12 eeepc dhclient:
    Jun 5 10:31:12 eeepc dhclient: wmaster0: unknown hardware address type 801
    Jun 5 10:31:12 eeepc dhclient: wmaster0: unknown hardware address type 801
    Jun 5 10:31:12 eeepc NetworkManager: <info> dhclient started with pid 3889
    Jun 5 10:31:12 eeepc NetworkManager: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) complete.
    Jun 5 10:31:12 eeepc NetworkManager: <info> DHCP: device wlan0 state changed (null) -> preinit
    Jun 5 10:31:12 eeepc dhclient: Listening on LPF/wlan0/00:15:af:b6:6b:6e
    Jun 5 10:31:12 eeepc dhclient: Sending on LPF/wlan0/00:15:af:b6:6b:6e
    Jun 5 10:31:12 eeepc dhclient: Sending on Socket/fallback
    Jun 5 10:31:13 eeepc dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 4
    Jun 5 10:31:18 eeepc dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 8
    Jun 5 10:31:26 eeepc dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 11
    Jun 5 10:31:37 eeepc dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 12
    Jun 5 10:31:49 eeepc dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 14
    Jun 5 10:31:57 eeepc NetworkManager: <info> Device 'wlan0' DHCP transaction took too long (>45s), stopping it.
    Jun 5 10:31:57 eeepc NetworkManager: <info> wlan0: canceled DHCP transaction, dhcp client pid 3889
    Jun 5 10:31:57 eeepc NetworkManager: <info> Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) scheduled...
    Jun 5 10:31:57 eeepc NetworkManager: <info> Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) started...
    Jun 5 10:31:57 eeepc NetworkManager: <info> (wlan0): device state change: 7 -> 9
    Jun 5 10:31:57 eeepc NetworkManager: <info> Activation (wlan0) failed for access point (EXKiGARE1)
    Jun 5 10:31:57 eeepc NetworkManager: <info> Marking connection 'EXKiGARE1' invalid.
    Jun 5 10:31:57 eeepc NetworkManager: <info> Activation (wlan0) failed.
    Jun 5 10:31:57 eeepc NetworkManager: <info> Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) complete.
    Jun 5 10:31:57 eeepc NetworkManager: <info> (wlan0): device state change: 9 -> 3
    Jun 5 10:31:57 eeepc NetworkManager: <info> (wlan0): deactivating device (reason: 0).

    .....

    Thanks for attention.
    Bye,
    Bruno

  2. #2
    Linux Guru rokytnji's Avatar
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    I can't speak for the Ubuntu Netbook Remixes or even Network Manager since I don't use wither one.

    On my wireless Netbook and Wireless Laptop I run AntiX instead using Wicd instead of Network manager. On my setup. I have in Wicd preferences the choice of running Automatic (which is like your auto dhcp I guess in Network manager).
    Another option in Wicd preferences is I can run just straight dhclient.

    I get dropped connections running Automatic. But since I switched to just straight dhclient. No more dropped connections. So I stick with straight dhclient instead of Automatic. But I run Wicd in AntiX. YMMV.
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  3. #3
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    What is the difference between 'automatic' and 'straight client' in wicd ?

    Does the straight client still use dhcp from the router to gain the IP address of the laptop ?
    Or is it related to the use of static address ?

    Bye,
    Bruno

  4. #4
    Linux Guru rokytnji's Avatar
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    Does the straight client still use dhcp from the router to gain the IP address of the laptop ?
    Yes

    Or is it related to the use of static address ?
    No


    I can see I am confusing you because I am from the South. When I say straight dhclient. It is my hillbilly way of just saying dhclient option.
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  5. #5
    Linux Engineer MASONTX's Avatar
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    Glad you clarified that, I was going to ask you what the difference was between a straight client and a gay one.

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