wlan/eth bridge stops working after a while: how to diagnose?

[Alexey Yudichev]

I've got ubuntu 9.10 (hostapd 0.6.9) + compat-wireless-2009-12-11 and the
box is acting as a basic wireless internet router. Driver is ath9k and
server adapter is D-Link DWA-547. All is working fine for 2-3 days until all
of a sudden wireless client (MacBook Pro) stops pinging any hosts on a local
network. The wireless association remains and hostapd logs are not showing
anything unusual. Restarting hostapd or even networking does not help
(although I believe restarting networking does not work well on ubuntu
anyway). Only rebooting the server helps.


What would you advise to check/debug or otherwise what would be the best
approach to diagnose the problem? I don't see anything interesting in dmesg,
messages or daemon.log at this point.

Thanks!
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