HT40 mode does not work, HT20 slow using ath9k

[Slowmo <slowmo@…>]

When selecting 40MHz HT mode on my WRT350Nv2, wireless clients can not authenticate anymore. When 20MHz HT mode is used, everything is fine except transfer speed is roughly the same as for G mode both when very close to router and couple of rooms farther (I did comparison test using PCATTCP). I am getting around 2000 KB/sec when far and 2500 KB/sec when close to the router. Even when far, link speed was reported to be 130Mbps, but wireless to wired transfer speed was nothing like 130Mbps.

And here is a system log when HT40 mode is set.

Nov 27 00:10:39 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:10:45 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: associated (aid 1)
Nov 27 00:10:50 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df WPA: pairwise key handshake completed (RSN)
Nov 27 00:10:53 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:11:06 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:11:11 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:11:20 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:11:20 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:11:56 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: authenticated
Nov 27 00:11:57 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: associated (aid 1)
Nov 27 00:11:57 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: associated (aid 1)
Nov 27 00:11:59 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df WPA: received EAPOL-Key 2/4 Pairwise with unexpected replay counter
Nov 27 00:11:59 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df WPA: received EAPOL-Key 2/4 Pairwise with unexpected replay counter
Nov 27 00:11:59 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: deauthenticated due to local deauth request
Nov 27 00:12:01 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: authenticated
Nov 27 00:12:02 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: associated (aid 1)
Nov 27 00:12:04 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df WPA: pairwise key handshake completed (RSN)
Nov 27 00:12:30 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:12:35 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:12:35 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:12:40 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: associated (aid 1)
Nov 27 00:12:41 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df WPA: received EAPOL-Key 2/4 Pairwise with unexpected replay counter
Nov 27 00:12:42 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df WPA: pairwise key handshake completed (RSN)
Nov 27 00:12:54 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:12:54 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:13:07 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:13:24 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:13:34 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:13:48 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:13:53 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:14:04 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:14:14 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:14:20 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:14:45 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:14:50 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:15:01 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:15:01 OpenWrt daemon.info hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: deauthenticated due to local deauth request
Nov 27 00:15:10 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response
Nov 27 00:15:19 OpenWrt daemon.notice hostapd: wlan0: STA 00:0e:2e:af:6f:df IEEE 802.11: did not acknowledge authentication response

[nbd]

Stability issues are tracked in #8830, please try the latest version