[Bug 56894] Re: WLAN disconnects repeatedly from AP when using WPA on a SMP machine

Ketil Malde ketil at ii.uib.no
Mon Jul 23 06:19:15 UTC 2007

Does "Fix Committed" mean that I shouldn't be seeing this?  'Cause I do,
this on Feisty with 2.6.20-16-generic.  Large file tranfers over wifi
break, confusing the wifi setup.  Interestingly enough, resetting the
access point allows me to restore things (by rerunning iwconfig/dhclient
on the client).  However, I've seen this happen on several different
access points now, from three different vendors (Apple, Billion, and
D-link).  Less intensive use (web browsing) cause no problems, it seems.

It may be related to encryption, I've only tested this with WEP (both
short and long keys).

Reducing the bandwidth to 2Mbit seems to alleviate the problem a bit,
but I'm unable to make the setting "stick", it gets reset to max at
regular intervals.

After the network is broken, I noticed that I couldn't make my wifi card
associate with the AP, repeated iwconfigs would mostly display "not
associated", and only occasionally the AP MAC address - which would then
disappear at the next invocation.  dhclient would broadcast, but never
get any replies.

This is on a Core 2 Duo Dell 620m.  I haven't tested the maxcpus option
to see if the problem is related to SMP.

WLAN disconnects repeatedly from AP when using WPA on a SMP machine
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