Esta condição está associada a: link
Estou usando uma placa wifi rlt8723 com o Kubuntu 15.10.
O cartão está configurado como mostrado:
ifconfig:
wlp3s0 Link encap:Ethernet HWaddr 70:77:81:32:3b:17
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
iwconfig:
wlp3s0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
resultados de rfkill list wifi são
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
lsmod|grep rtl8723 mostra:
rtl8723be 86016 0
btcoexist 53248 1 rtl8723be
rtl8723_common 24576 1 rtl8723be
rtl_pci 28672 1 rtl8723be
rtlwifi 77824 2 rtl_pci,rtl8723be
mac80211 733184 3 rtl_pci,rtlwifi,rtl8723be
no entanto, o net-manager não detecta redes sem fio e roda
iwlist wlps30 scan as root dá "nenhum resultado".
Se eu inicializar no Windows 10, várias redes serão detectadas, o hardware funcionando corretamente.
Configurações do gerenciador de rede da ferramenta de informações sem fio:
'##### network managers ##################
Installed:
NetworkManager
Running:
root 784 1 0 19:56 ? 00:00:02 /usr/sbin /NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: wlp3s0
GENERAL.TYPE: wifi
GENERAL.NM-TYPE: NMDeviceWifi
GENERAL.VENDOR: Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT: RTL8723BE PCIe Wireless Network Adapter
GENERAL.DRIVER: rtl8723be
GENERAL.DRIVER-VERSION: 4.2.0-23-generic
GENERAL.FIRMWARE-VERSION: N/A
GENERAL.HWADDR: <MAC 'wlp3s0' [IF]>
GENERAL.MTU: 0
GENERAL.STATE: 30 (disconnected)
GENERAL.REASON: 42 (The supplicant is now available)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.2/0000:03:00.0/net/wlp3s0
GENERAL.IP-IFACE:
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: no
WIFI-PROPERTIES.WEP: yes
WIFI-PROPERTIES.WPA: yes
WIFI-PROPERTIES.WPA2: yes
WIFI-PROPERTIES.TKIP: yes
WIFI-PROPERTIES.CCMP: yes
WIFI-PROPERTIES.AP: yes
WIFI-PROPERTIES.ADHOC: yes
WIFI-PROPERTIES.2GHZ: yes
WIFI-PROPERTIES.5GHZ: no
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
SSID BSSID MODE CHAN FREQ RATE SIGNAL BARS SECURITY ACTIVE *
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
##### NetworkManager profiles ###########'
Existe outra configuração que precisa ser configurada?
Atualização 1/20/2016: usando o linux-image-4.2.0-25
tentou carregar módulo rtl8723be com:
modprobe -v rtl8723be ant_sel=1
e
modprobe -v rtl8723be ant_sel=2
não há sucesso em obter o cartão WIFI para detectar redes.
para referência veja
link