Red Hat Bugzilla – Bug 468563
wireless iwl4965 kernel>=2.6.26 drops data
Last modified: 2009-07-14 10:23:45 EDT
Description of problem:
Using a ethernet wireless bridge, connects from laptop ok in adhoc mode. Pinging the other end of the link just stops gettting responses after a while. Reset the link, using ifdown/up at the laptop starts everthing working again.
Version-Release number of selected component (if applicable):
Works with kernel 2.6.25-14, fails on the all official 2.6.26's. Laptop is kept up to date on updates.
Using ipup connect to ethernet wireless bridge. All looks ok thru iwconfig.
Ping the device attached to the bridge, OK. After a short period of time (10-15 pings) the ping returns stop (though pinging continues). Same result from the device attached to the bridge (pinging back to the fedora laptop).
Happens every boot session under 2.6.26 kernels.
Looks like a data loss not a connection loss,. Iwconfig still reports connection to bridge. Laptop still sending pings but no returns.
Taking the interface down then up again with ipdown/up restarts the links with initial succesful pings. But returns stop after 10-15 pings.
Also fails on the recent released kernel-220.127.116.11
The problem appears to definitely be at the laptop (iwl4965) end!
If I setup the wireless link as before between the laptop and the ethernet wireless bridge (attached to a desktop) and ping from the desktop through the bridge to the laptop (Running in adhoc mode to the bridge) I get the following.
Running tcpdump on the laptop (through iwl4965) when the ping responses stop on the desktop, the laptop tcpdump shows that they are still arriving and that reply is being sent but are not being received!!
Again this is only occurring on fedora kernels > 2.6.26.x. I have not tried any vanilla kernels.
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