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March 2013

SCIENTIFIC-LINUX-USERS@LISTSERV.FNAL.GOV

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Subject:
From:
Steven Haigh <[log in to unmask]>
Reply To:
Steven Haigh <[log in to unmask]>
Date:
Tue, 12 Mar 2013 21:03:46 +1100
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Hi all,

I've been trying to figure out the cause of this... It seems I'll be 
using the wifi without issue, then NetworkManager will indicate that it 
is reconnecting. It seems to happen randomly with no real pattern.

iw events -t shows:
4b:d6:98:14:48 -> 00:0f:66:c5:2d:6b reason 3: Deauthenticated because 
sending station is leaving (or has left) the IBSS or ESS
1363082116.240481: wlan0 (phy #0): disconnected (local request)
....
1363082122.323703: wlan0 (phy #0): auth 00:0f:66:c5:2d:6b -> 
1c:4b:d6:98:14:48 status: 0: Successful
1363082122.344295: wlan0 (phy #0): assoc 00:0f:66:c5:2d:6b -> 
1c:4b:d6:98:14:48 status: 0: Successful
1363082122.347571: wlan0 (phy #0): connected to 00:0f:66:c5:2d:6b

Interestingly, I've only had this problem under linux. The access point 
is stable and works fine with the same card under Windows 7 - as well as 
our smart phones etc etc. The access point hasn't changed in a number of 
years (4+).

At the moment, I'm using the kernel-ml from elrepo until I can get the 
eeepc module re-enabled for 64 bit kernels from our wondering upstream 
provider. (Battery life dies to about 3.5 hours instead of 5+ with it!)

I've tried 'iwconfig wlan0 power off' to disable power management from 
the wifi adapter, but the dropouts still seem to randomly happen. The AP 
is secured with WPA2-PSK (AES+TKIP) - not sure if that makes a difference...

Does anyone have any thoughts in troubleshooting this?

-- 
Steven Haigh

Email: [log in to unmask]
Web: https://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897
Fax: (03) 8338 0299

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