#3 Lots of traffic causes DWL-520+ driver to hang.


I'm not certain how to describe this, or what files to
send, but here's the phenomology:
OS: Mandrake 9.1 with default kernel (2.4.21-0.13mdk)
Problem: When I atttempt to make a large number of
network calls (?) the driver hangs and I lose
connectivity. An example would be using scp to copy 20
or so files to another machine on my lan.

The only way I can re-establish the link is to reload
the module (after removing it).

Could this be a bug? How can I help to fix it?


  • Andreas Mohr

    Andreas Mohr - 2003-10-03

    Logged In: YES

    You haven't included a log yet, but I guess that the driver
    does NOT hang (or at least I haven't heard of that yet), but
    instead it has ring buffer problems (which should still be
    there even with 0.2.0pre3, unfortunately).
    This needs fixing.

  • Andreas Mohr

    Andreas Mohr - 2003-10-08

    Logged In: YES

    0.2.0pre4 should make sure this problem is fixed again,
    please try.

  • Olivier Fauchon

    Olivier Fauchon - 2003-10-14

    Logged In: YES

    Same for me (kernel 2.4.22) & 1 weeks-old CVS co.
    After a few minutes of net trafic ( browsing for example ) ,
    the driver hangs, and network is down.

    I use this dirty script to re-enable periodically my wlan0:

    olivier@aurora:~/scripts/wifi$ cat dwl520keepUp.sh
    while true; do
    iwconfig wlan0 essid mtice mode managed;
    sleep 60;

    /var/log/messages report bunch of:
    Oct 13 15:56:44 aurora kernel: NETDEV WATCHDOG: wlan0:
    transmit timed out.

    i'll try to update my sources today.

  • Nobody/Anonymous

    Logged In: NO

    I got same exectly situation! And even more. If the driver no
    active for some time -- about 10 - 20 min, connection lost!
    I had stop syslog on my comp -- Mandrake 9.1 with 2.4.21-
    0.13 kernel, becouse the log file become too huge -- ~2GB!

  • Imanol Martín

    Imanol Martín - 2003-10-25

    Logged In: YES

    I'm also getting that annoying problem, my wireless interface
    loses connectivity after a while of being up. The solution: just
    executing "iwconfig essid XXXXXX mode Managed..." every 5
    minutes (or the time you need), introducing it as a new line in
    crontab (with it's propper format, more info "man crontab"),
    and cron daemon takes care of geting my interface up every
    5 minutes. Just another momentary solution, while the
    problem is solved.


  • Andreas Mohr

    Andreas Mohr - 2003-11-10

    Logged In: YES

    Hmm, does 0.2.0pre5 fix it, by chance?
    If not, then please attach a log with debug 0x109b.


  • Nobody/Anonymous

    Logged In: NO

    The last pre6 driver still hang up on 2.4.22 kernel and couse a
    lot traffic. Is the any work around to keep driver up?
    For some reason renew essid & mode for iwconfig doesn't help!
    and I must unload --> load driver. Distributive Gentoo 1.4,
    gcc -03, pentium4.

  • Bill Waggoner

    Bill Waggoner - 2003-11-29

    Logged In: YES

    I've just gotten my DWL-520+ working on Slackware 9.1
    (2.4.22) and it's working well including WEP. But I, too,
    occasionally lose connection with the rest of the network
    even though there is no indication of a problem in any of the
    logs that I have found. Unloading and reloading the module
    clears the problem.

    What can I do to gather more information to help figure out
    what's happening?

  • Anonymous - 2003-11-30

    Logged In: YES

    I guess, I reported accidentally the same issue as Bug#
    850351 - I attached a logfile with debug=0x109b. Perhaps
    this helps to tackle the problem.

  • Lars Termansen

    Lars Termansen - 2004-02-03

    Logged In: YES

    I have the same problem. I am using Mandrake 9.2 with
    Craig's (http://www.houseofcraig.net/acx100_howto.php)
    precompiled driver version 0.2pre6.
    It does not necessarily happen with lots of traffic - it just
    seems to happen once in a while.

  • Lars Termansen

    Lars Termansen - 2004-02-03

    Logged In: YES

    Damn I meant the version 0.2pre7 of course...

  • nino ciurleo

    nino ciurleo - 2004-02-16

    Logged In: YES

    I try with 0.2pre7 on my slackware 9.1 and 2.4.22 kernel and
    my dwl-520+ hang after a lots of traffic... I want to help to
    fix it!

  • Christian Kirbach

    • status: open --> closed-out-of-date
  • Christian Kirbach

    Logged In: YES

    Closing due to no activity within the last 6 months.

    If you want to reopen the bug please make sure you have checked
    that the problem persists even with the latest driver.
    You can get the driver from http://lisas.de/~andi/acx100/


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