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TP-Link card not working at 802.11n speed [solved]
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Tom_
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Joined: 20 May 2004
Posts: 385
Location: France

PostPosted: Sat Jan 18, 2014 2:33 pm    Post subject: TP-Link card not working at 802.11n speed [solved] Reply with quote

Hi,

My wifi card is not working at 802.11n speed :
Code:
thomas@gentoo ~ % sudo iwlist scan :
..
  Cell 04 - Address: 7A:04:32:69:25:0C
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=53/70  Signal level=-57 dBm 
                    Encryption key:on
                    ESSID:"SophieThomas"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                              18 Mb/s; 36 Mb/s; 54 Mb/s[
                    Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000017b307eb225
                    Extra: Last beacon: 36ms ago
                    IE: Unknown: 000C536F7068696554686F6D6173
                    IE: Unknown: 010882848B961224486C
                    IE: Unknown: 03010B
                    IE: Unknown: 2A0104
                    IE: Unknown: 32040C183060
                    IE: Unknown: 2D1A6E1017FFFF000001000000000000000000000000000000000000
                    IE: Unknown: 3D160B070700000000000000000000000000000000000000
                    IE: Unknown: 3E0100
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
                    IE: Unknown: 7F0101
                    IE: Unknown: DD07000C4300000000
                    IE: Unknown: DD1E00904C336E1017FFFF000001000000000000000000000000000000000000
                    IE: Unknown: DD1A00904C340B070700000000000000000000000000000000000000


My access point supports 802.11n (http://www.free.fr/adsl/freebox-crystal.html) as well as my wifi card (TP-Link TL-WN851N).

Additional informations about my setup :
Code:
thomas@gentoo ~ % uname -a
Linux gentoo 3.10.9 #1 SMP Sun Aug 25 16:39:47 CEST 2013 x86_64 Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz GenuineIntel GNU/Linux
thomas@gentoo ~ % lsmod | grep ath9
ath9k                  88366  0
ath9k_common            2655  1 ath9k
ath9k_hw              390469  2 ath9k_common,ath9k
ath                    16966  3 ath9k_common,ath9k,ath9k_hw
mac80211              440737  1 ath9k
cfg80211              456283  3 ath,ath9k,mac80211
thomas@gentoo linux % grep ATH9 .config
CONFIG_ATH9K_HW=m
CONFIG_ATH9K_COMMON=m
CONFIG_ATH9K_BTCOEX_SUPPORT=y
CONFIG_ATH9K=m
CONFIG_ATH9K_PCI=y
# CONFIG_ATH9K_AHB is not set
# CONFIG_ATH9K_DEBUGFS is not set
# CONFIG_ATH9K_LEGACY_RATE_CONTROL is not set
# CONFIG_ATH9K_HTC is not set
thomas@gentoo linux % grep 802 .config
# CONFIG_VLAN_8021Q is not set
# CONFIG_IEEE802154 is not set
CONFIG_CFG80211=m
# CONFIG_NL80211_TESTMODE is not set
# CONFIG_CFG80211_DEVELOPER_WARNINGS is not set
# CONFIG_CFG80211_REG_DEBUG is not set
# CONFIG_CFG80211_CERTIFICATION_ONUS is not set
CONFIG_CFG80211_DEFAULT_PS=y
# CONFIG_CFG80211_DEBUGFS is not set
# CONFIG_CFG80211_INTERNAL_REGDB is not set
CONFIG_CFG80211_WEXT=y
# CONFIG_LIB80211 is not set
CONFIG_MAC80211=m
CONFIG_MAC80211_HAS_RC=y
# CONFIG_MAC80211_RC_PID is not set
CONFIG_MAC80211_RC_MINSTREL=y
CONFIG_MAC80211_RC_MINSTREL_HT=y
CONFIG_MAC80211_RC_DEFAULT_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT="minstrel_ht"
# CONFIG_MAC80211_MESH is not set
CONFIG_MAC80211_LEDS=y
# CONFIG_MAC80211_DEBUGFS is not set
# CONFIG_MAC80211_MESSAGE_TRACING is not set
# CONFIG_MAC80211_DEBUG_MENU is not set
# CONFIG_APDS9802ALS is not set
# CONFIG_MAC80211_HWSIM is not set
# CONFIG_LEDS_BD2802 is not set
# CONFIG_RTC_DRV_RX8025 is not set
# CONFIG_RTC_DRV_BQ4802 is not set


I don't know what's wrong here.

Could you help me ?

Thank you
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Tom_
Guru
Guru


Joined: 20 May 2004
Posts: 385
Location: France

PostPosted: Wed Jan 22, 2014 7:20 pm    Post subject: Reply with quote

I solved the problem.

I was using tkip which isn't supported for 802.11n. I switched to aes/ccmp and now my card is working at 802.11n speed.
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