I&#39;ve already ruled-out the AP because I have several other computers running on it with no issues, from straight Debian to MintLinux to Ubuntu to Windows XP and varying many different kernels. My <b>only</b> problem occurs in Ubuntu 9.10 Karmic.<div>

<br></div><div>What&#39;s the first step for debugging the stack?</div><br><div class="gmail_quote">On Fri, Nov 20, 2009 at 2:47 PM, Dan Williams <span dir="ltr">&lt;<a href="mailto:dcbw@redhat.com">dcbw@redhat.com</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">On Fri, 2009-11-20 at 14:37 -0500, Bryan Moore wrote:<br>
&gt; I think that&#39;s where my problem is a little different, since I use<br>
&gt; neither network-manager nor wicd.<br>
<br>
</div>Then that points to either an AP issue or a driver issue.  I&#39;d first<br>
suspect the driver, but consumer-level APs are often pieces of junk that<br>
sometimes randomly fail as well.<br>
<br>
First try to reboot the AP.  If that doesn&#39;t help, then try to downgrade<br>
your kernel if you still have an older one installed.  That can help<br>
isolate driver issues.<br>
<br>
After that, well, you have to jump into debugging the kernel wireless<br>
stack, which isn&#39;t really that bad.<br>
<font color="#888888"><br>
Dan<br>
</font><div><div></div><div class="h5"><br>
&gt; On Fri, Nov 20, 2009 at 2:36 PM, Dan Williams &lt;<a href="mailto:dcbw@redhat.com">dcbw@redhat.com</a>&gt; wrote:<br>
&gt;         On Fri, 2009-11-20 at 05:25 -0500, Bryan Moore wrote:<br>
&gt;         &gt; Thanks... I figured that was going to be the answer, but was<br>
&gt;         hoping<br>
&gt;         &gt; someone would just write-back &quot;oh, it&#39;s this...&quot;<br>
&gt;         &gt; :-(<br>
&gt;<br>
&gt;<br>
&gt;         It&#39;s almost never that simple :)<br>
&gt;<br>
&gt;         &gt; Here&#39;s one I started in UbuntuForums, here&#39;s my Launchpad<br>
&gt;         bug, here&#39;s<br>
&gt;         &gt; one of the others, and I&#39;ve attached some of command outputs<br>
&gt;         specific<br>
&gt;         &gt; to my system.<br>
&gt;<br>
&gt;<br>
&gt;         The Syslog.txt in that first Launchpad bug shows a lot of:<br>
&gt;<br>
&gt;         Jul 18 17:17:28 molly kernel: [25847.724098] wlan0: no probe<br>
&gt;         response from AP 00:13:d3:81:ac:d6 - disassociating<br>
&gt;<br>
&gt;         It looks from that bug report that NM is working correctly,<br>
&gt;         but often<br>
&gt;         the driver simply disconnects you because the AP is not<br>
&gt;         responding to<br>
&gt;         probe requests, or the driver has a bug which causes it to<br>
&gt;         miss the<br>
&gt;         probe responses.<br>
&gt;<br>
&gt;         Dan<br>
&gt;<br>
&gt;<br>
&gt;         &gt; Thanks, again.<br>
&gt;         &gt;<br>
&gt;         &gt;<br>
&gt;         &gt; On Thu, Nov 19, 2009 at 6:12 PM, Jouni Malinen &lt;<a href="mailto:j@w1.fi">j@w1.fi</a>&gt;<br>
&gt;         wrote:<br>
&gt;         &gt;<br>
&gt;         &gt;         On Thu, Nov 19, 2009 at 02:52:13PM -0500, Bryan<br>
&gt;         Moore wrote:<br>
&gt;         &gt;         &gt; There are *many* questions regarding some basic<br>
&gt;         networking<br>
&gt;         &gt;         problems in<br>
&gt;         &gt;         &gt; Ubuntu Karmic Koala 9.10 and the forum<br>
&gt;         &gt;         (<a href="http://www.ubuntuforum.org/" target="_blank">http://www.ubuntuforum.org/</a>)<br>
&gt;         &gt;         &gt; provided me little direction in this single case,<br>
&gt;         so I<br>
&gt;         &gt;         thought I&#39;d go to the<br>
&gt;         &gt;         &gt; source.<br>
&gt;         &gt;         &gt;<br>
&gt;         &gt;         &gt; It would *seem* there is a problem with<br>
&gt;         wpa_supplicant in<br>
&gt;         &gt;         Ubuntu right now;<br>
&gt;         &gt;         &gt; some, me being one, are having *serious<br>
&gt;         *networking issues<br>
&gt;         &gt;         when using WPA2.<br>
&gt;         &gt;         &gt; There are some threads discussing it and a bug has<br>
&gt;         been<br>
&gt;         &gt;         filed in Launchpad,<br>
&gt;         &gt;         &gt; but most focus on a Network-Manager issue rather<br>
&gt;         than<br>
&gt;         &gt;         wpa_supplicant. Some<br>
&gt;         &gt;         &gt; have also reported the issue either greatly<br>
&gt;         diminishes or<br>
&gt;         &gt;         disappears<br>
&gt;         &gt;         &gt; completely when switching from WPA2 to WPA.<br>
&gt;         &gt;         &gt;<br>
&gt;         &gt;         &gt; Could you advise me where to begin my little<br>
&gt;         investigation?<br>
&gt;         &gt;<br>
&gt;         &gt;<br>
&gt;         &gt;         You could start by providing some more details of<br>
&gt;         the issue or<br>
&gt;         &gt;         a pointer<br>
&gt;         &gt;         to such description (like a full URL to a thread<br>
&gt;         discussing<br>
&gt;         &gt;         this or a<br>
&gt;         &gt;         specific bug in Launchpad). As far as this mailing<br>
&gt;         list is<br>
&gt;         &gt;         concerned,<br>
&gt;         &gt;         getting a verbose debug log from wpa_supplicant<br>
&gt;         (both success<br>
&gt;         &gt;         and<br>
&gt;         &gt;         failure case) and description of which driver you<br>
&gt;         are using<br>
&gt;         &gt;         would also<br>
&gt;         &gt;         be quite helpful.<br>
&gt;         &gt;<br>
&gt;         &gt;         --<br>
&gt;         &gt;         Jouni Malinen<br>
&gt;              PGP<br>
&gt;         &gt;         id EFC895FA<br>
&gt;         &gt;         _______________________________________________<br>
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&gt;         &gt;<br>
&gt;         &gt; _______________________________________________<br>
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&gt;<br>
&gt;<br>
&gt;<br>
<br>
</div></div></blockquote></div><br>