Same problems (even worth) for my Thinkpad T60 2007CB5 (Intel 3945abg).
1, freeze a lot while using network-manager (every 2-5 minutes with WIFI on,
never with WIFI off)
2, freeze every 10-20 minutes while using WICD1.62 with the default WPA
supplier
2.1 By checking log iw event -t, will reconnect every 60-75 seconds.
(deauthenticated (Reason: 3))
2.2 Before freezing, there are some log as(now frozen, has to type it out):
[813. 069493] e1000e 0000:02:00.0 irq 20 for MSI/MSI-X
[813. 125177] e1000e 0000:02:00.0 irq 20 for MSI/MSI-X
[813. 126030] ADDRCONF(NETDEV_UP): eth0:link is not ready
....
[813. 757091] ADDRCONF(NETDEV_UP): wlan0:link is not ready
--
[Karmic] Intel Pro/Wireless 3945BG (driver: iwl3945) disconnects frequently at
random
https://bugs.launchpad.net/bugs/429035
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