Bug 154157

Summary:	[ath] Monitor mode is broken on at least the AR9280
Product:	Base System	Reporter:	Adrian Chadd <adrian>
Component:	kern	Assignee:	Adrian Chadd <adrian>
Status:	Closed FIXED
Severity:	Affects Only Me
Priority:	Normal
Version:	Unspecified
Hardware:	Any
OS:	Any

Description Adrian Chadd freebsd_committer

2011-01-20 07:20:08 UTC

Monitor mode with if_ath on at least the AR9280 is broken. It hasn't been tried on earlier cards.

After a short period, frames stop being received.

Fix: 

Sometimes bouncing the interface is enough. Other times unloading/reloading the interface is enough.
How-To-Repeat: # ifconfig wlan0 create wlandev ath0 wlanmode monitor
# ifconfig wlan0 channel 6
# ifconfig wlan0 up
# tcpdump -ni wlan0 -y IEEE802_11_RADIO

[wait a short period]

Comment 1 Mark Linimon freebsd_committer

2011-01-20 11:23:07 UTC

Responsible Changed
From-To: freebsd-bugs->adrian

Over to maintainer.

Comment 2 Adrian Chadd freebsd_committer

2011-04-09 04:05:45 UTC

State Changed
From-To: open->closed

This turned out to be an issue with the board setup for Merlin 
and later. 

Once the register initvals were updated and the board setup code 
was synched to ath9k, all the RX stability issues disappeared.