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[Solved] iwconfig wlan0 : no wireless extensions
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double_crane
Tux's lil' helper
Tux's lil' helper


Joined: 11 Dec 2011
Posts: 119
Location: JiangSu,China

PostPosted: Mon Jul 22, 2013 3:19 am    Post subject: [Solved] iwconfig wlan0 : no wireless extensions Reply with quote

my laptop has these two net cards

Code:

#~: lspci:
:Network controller: Realtek Semiconductor Co., Ltd. RTL8723AE PCIe Wireless Network Adapter

:Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller (rev 0a)


now eth0 use correctly.but wlan0 not.

in kernel, drivers, network,wireless LAN , I have choosed CONFIG_RTL8723AE
and I 've copy realtek firmware in /lib/firmware/

Code:


~#: dmesg:
[    0.226352] pci 0000:04:00.0: [10ec:8723] type 00 class 0x028000
[    3.092680] rtl8723ae: Using firmware rtlwifi/rtl8723fw_B.bin


now wlan0 inode exist in ifconfig
Code:

~$:ifconfig:
wlan0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 24:fd:52:7b:ba:e1  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0



but wlan0 is still not able to use.
Here are the ERRORS

Code:

localhost ~ # iwconfig
eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     no wireless extensions.

localhost ~ # iwlist wlan0 scan
wlan0     Interface doesn't support scanning.




Any ideas?


Last edited by double_crane on Mon Jul 22, 2013 7:45 am; edited 1 time in total
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double_crane
Tux's lil' helper
Tux's lil' helper


Joined: 11 Dec 2011
Posts: 119
Location: JiangSu,China

PostPosted: Mon Jul 22, 2013 6:31 am    Post subject: Reply with quote

related CONFIGs my kernel

networking support---Wireless-->

Code:

CONFIG_WIRELESS=y
CONFIG_CFG80211=y
# CONFIG_NL80211_TESTMODE is not set
# CONFIG_CFG80211_DEVELOPER_WARNINGS is not set
# CONFIG_CFG80211_REG_DEBUG is not set
CONFIG_CFG80211_DEFAULT_PS=y
# CONFIG_CFG80211_DEBUGFS is not set
# CONFIG_CFG80211_INTERNAL_REGDB is not set
# CONFIG_CFG80211_WEXT is not set
# CONFIG_LIB80211 is not set
CONFIG_MAC80211=y
CONFIG_MAC80211_HAS_RC=y
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_DEBUGFS is not set
# CONFIG_MAC80211_MESSAGE_TRACING is not set
# CONFIG_MAC80211_DEBUG_MENU is not set
# CONFIG_WIMAX is not set
CONFIG_RFKILL=y
CONFIG_RFKILL_INPUT=y
# CONFIG_NET_9P is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set
# CONFIG_NFC is not set
CONFIG_HAVE_BPF_JIT=y



Device drivers-->network device support---wireless lan

Code:

CONFIG_WLAN=y
CONFIG_RTL8723AE=y
# CONFIG_RTL8192CU is not set
CONFIG_RTLWIFI=y

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double_crane
Tux's lil' helper
Tux's lil' helper


Joined: 11 Dec 2011
Posts: 119
Location: JiangSu,China

PostPosted: Mon Jul 22, 2013 7:44 am    Post subject: Reply with quote

Solved.

see this webpage

http://www.linuxquestions.org/questions/linux-wireless-networking-41/wlan0-no-wireless-extension-907830/

it's useful

Code:

Gentoo linux # iw wlan0 scan
BSS 00:21:27:60:73:74(on wlan0)
   TSF: 76338278785 usec (0d, 21:12:18)
   freq: 2437
   beacon interval: 100 TUs
   capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
   signal: -54.00 dBm
   last seen: 390 ms ago
   Information elements from Probe Response frame:
   SSID: TP-LINK
   Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 12.0 24.0 36.0
   DS Parameter set: channel 6
   Country: CN   Environment: Indoor/Outdoor
      Channels [1 - 13] @ 20 dBm
   ERP: Use_Protection
   Extended supported rates: 9.0 18.0 48.0 54.0
   RSN:    * Version: 1
       * Group cipher: TKIP
       * Pairwise ciphers: TKIP CCMP
       * Authentication suites: PSK
       * Capabilities: PreAuth (0x0001)
   WPA:    * Version: 1
       * Group cipher: TKIP
       * Pairwise ciphers: TKIP CCMP
       * Authentication suites: PSK
BSS bc:d1:77:a7:24:3e(on wlan0)
   TSF: 12644354701 usec (0d, 03:30:44)
   freq: 2437
   beacon interval: 100 TUs
   capability: ESS Privacy ShortPreamble SpectrumMgmt (0x0131)
   signal: 16.00 dBm
   last seen: 432 ms ago
   Information elements from Probe Response frame:
   SSID: ISO60
   Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
   DS Parameter set: channel 6
   ERP: NonERP_Present
   RSN:    * Version: 1
       * Group cipher: TKIP
       * Pairwise ciphers: CCMP TKIP
       * Authentication suites: PSK
       * Capabilities: (0x0000)
   Extended supported rates: 24.0 36.0 48.0 54.0
   HT capabilities:
      Capabilities: 0x106e
         HT20/HT40
         SM Power Save disabled
         RX HT20 SGI
         RX HT40 SGI
         No RX STBC
         Max AMSDU length: 3839 bytes
         DSSS/CCK HT40
      Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
      Minimum RX AMPDU time spacing: No restriction (0x00)
      HT RX MCS rate indexes supported: 0-15
      HT TX MCS rate indexes are undefined
   HT operation:
       * primary channel: 6
       * secondary channel offset: below
       * STA channel width: any
       * RIFS: 0
       * HT protection: non-HT mixed
       * non-GF present: 1
       * OBSS non-GF present: 1
       * dual beacon: 0
       * dual CTS protection: 0
       * STBC beacon: 0
       * L-SIG TXOP Prot: 0
       * PCO active: 0
       * PCO phase: 0
   WMM:    * Parameter version 1
       * BE: CW 15-1023, AIFSN 3
       * BK: CW 15-1023, AIFSN 7
       * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
       * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
   WPS:    * Version: 1.0
       * Wi-Fi Protected Setup State: 2 (Configured)
       * Response Type: 3 (AP)
       * UUID: 00000000-0000-1000-0000-bcd177a7243e
       * Manufacturer: TP-LINK
       * Model: TL-WR841N
       * Model Number: 1.0
       * Serial Number: 1.0
       * Primary Device Type: 6-0050f204-1
       * Device name: Wireless N Router WR841N
       * Config methods: Ethernet, Label, PBC
       * RF Bands: 0x1
BSS 8c:21:0a:c5:47:c8(on wlan0)
   TSF: 1319566336384 usec (15d, 06:32:46)
   freq: 2437
   beacon interval: 100 TUs
   capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)
   signal: -66.00 dBm
   last seen: 434 ms ago
   Information elements from Probe Response frame:
   SSID: njhxgcrczx
   Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
   DS Parameter set: channel 6
   Country: US   Environment: Indoor/Outdoor
      Channels [1 - 13] @ 20 dBm
   ERP: <no flags>
   RSN:    * Version: 1
       * Group cipher: CCMP
       * Pairwise ciphers: CCMP
       * Authentication suites: PSK
       * Capabilities: (0x0000)
   Extended supported rates: 24.0 36.0 48.0 54.0
   HT capabilities:
      Capabilities: 0x106e
         HT20/HT40
         SM Power Save disabled
         RX HT20 SGI
         RX HT40 SGI
         No RX STBC
         Max AMSDU length: 3839 bytes
         DSSS/CCK HT40
      Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
      Minimum RX AMPDU time spacing: No restriction (0x00)
      HT RX MCS rate indexes supported: 0-7
      HT TX MCS rate indexes are undefined
   HT operation:
       * primary channel: 6
       * secondary channel offset: above
       * STA channel width: any
       * RIFS: 0
       * HT protection: nonmember
       * non-GF present: 0
       * OBSS non-GF present: 1
       * dual beacon: 0
       * dual CTS protection: 0
       * STBC beacon: 0
       * L-SIG TXOP Prot: 0
       * PCO active: 0
       * PCO phase: 0
   WPA:    * Version: 1
       * Group cipher: CCMP
       * Pairwise ciphers: CCMP
       * Authentication suites: PSK
   WMM:    * Parameter version 1
       * BE: CW 15-1023, AIFSN 3
       * BK: CW 15-1023, AIFSN 7
       * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
       * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
   WPS:    * Version: 1.0
       * Wi-Fi Protected Setup State: 2 (Configured)
       * Response Type: 3 (AP)
       * UUID: 00000000-0000-1000-0000-8c210ac547c8
       * Manufacturer: TP-LINK
       * Model: TL-WR740N
       * Model Number: 1.0
       * Serial Number: 1.0
       * Primary Device Type: 6-0050f204-1
       * Device name: Wireless N Router WR740N
       * Config methods: Ethernet, Label, PBC
       * RF Bands: 0x1




wireless extensions is being phased out progressively
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