hi, I am reading ath9k code. And try use superchannel (2312 ~ 2732) on openwrt. I have successfully opened these channels, and verified by mikrotik. But when use hostapd on these superchannel , ath9k can not send out any packets. A large number of Global Tx Timeout (GTT) and Carrier Sense Timeout (CST) were interrupted. root@OpenWrt:~# cat /sys/kernel/debug/ieee80211/phy0/ath9k/interrupt CST: 791 GTT: 660 My chip is ar9331 which is ar9003 family. I am confused by some registers in ar9003_phy.h. In ar9331 datasheet many registers are reserved. I do not know how to go on now. Can you give me a hint? Regards