Não é possível detectar minha placa wireless em um Lenovo Ideapad Yoga 11s

Question

Sou novo no Ubuntu e queria mergulhar no novo sistema operacional para ter uma idéia do Linux. Eu instalei o Ubuntu 14.04 no meu Lenovo Ideapad Yoga 11s e instalei o google chrome e atualizações para o sistema. Quando eles terminaram de instalar, eu não conseguia mais acessar a internet. Não há nenhum ícone de Wi-Fi e nenhuma rede é mostrada nas configurações. Não há drivers adicionais que precisem ser instalados.

$ rfkill list all
0: ideapad_wlan: Wireless LAN
    Soft blocked: no
    hard blocked: no
1: ideapad_bluetooth: Bluetooth
    soft blocked: yes
    hard blocked: no
$ lspci -nn | grep 0280 
# no results

Também executei uma opção 2 do script sem fio

########## wireless info START ##########

Report from: 13 Feb 2015 19:55 EST -0500

Booted last: 13 Feb 2015 19:52 EST -0500

Script from: 20 Sep 2014 23:04 UTC +0000

##### release ###########################

Distributor ID: Ubuntu
Description:    Ubuntu 14.04.1 LTS
Release:    14.04
Codename:   trusty

##### kernel ############################

Linux 3.13.0-45-generic #74-Ubuntu SMP Tue Jan 13 19:36:28 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Parameters: ro, quiet, splash, vt.handoff=7

##### desktop ###########################

Ubuntu

##### lspci #############################

##### lsusb #############################

Bus 002 Device 005: ID 04f2:b35e Chicony Electronics Co., Ltd
Bus 002 Device 004: ID 0bda:1724 Realtek Semiconductor Corp.
Bus 002 Device 003: ID 2047:0855 Texas Instruments
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 03eb:8814 Atmel Corp.
Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 002: ID 1b1c:1a03 Corsair
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

##### PCMCIA card info ##################

##### rfkill ############################

0: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: ideapad_bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no

##### lsmod #############################

ideapad_laptop         18216  0
sparse_keymap          13948  1 ideapad_laptop
wmi                    19177  0

##### interfaces ########################

auto lo
iface lo inet loopback

##### ifconfig ##########################

##### iwconfig ##########################

lo        no wireless extensions.

##### route #############################

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

##### resolv.conf #######################

##### nm-tool ###########################

NetworkManager Tool

State: disconnected

##### NetworkManager.state ##############

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true

##### NetworkManager.conf ###############

[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq

[ifupdown]
managed=true

##### NetworkManager profiles ###########

[[/etc/NetworkManager/system-connections/dragonfly3]] (600 root)
[ipv6] method=auto
[connection] id=dragonfly3 | type=802-11-wireless
[802-11-wireless] ssid=dragonfly3 | mac-address=<MAC address>
[802-1x] system-ca-certs=true
[ipv4] method=auto

[[/etc/NetworkManager/system-connections/TiggleBittyNP]] (600 root)
[connection] id=TiggleBittyNP | type=802-11-wireless
[802-11-wireless] ssid=TiggleBittyNP | mac-address=<MAC address>
[ipv4] method=auto
[ipv6] method=auto

##### iw reg get ########################

Region: America/New_York (based on set time zone)

country 00:
    (2402 - 2472 @ 40), (6, 20)
    (2457 - 2482 @ 40), (6, 20), PASSIVE-SCAN, NO-IBSS
    (2474 - 2494 @ 20), (6, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS
    (5170 - 5250 @ 160), (6, 20), PASSIVE-SCAN, NO-IBSS
    (5250 - 5330 @ 160), (6, 20), DFS, PASSIVE-SCAN, NO-IBSS
    (5490 - 5730 @ 160), (6, 20), DFS, PASSIVE-SCAN, NO-IBSS

##### iwlist channels ###################

lo        no frequency information.

##### iwlist scan #######################

lo        Interface doesn't support scanning.

##### module infos ######################

##### module parameters #################

##### /etc/modules ######################

lp
rtc

##### modprobe options ##################

[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci

[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac

[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off

[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211

[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en

##### rc.local ##########################

exit 0

##### pm-utils ##########################

[/etc/pm/sleep.d/wakenet.sh] (755 root)
case "$1" in
thaw|resume)
nmcli nm sleep false

##### udev rules ########################

[/etc/udev/rules.d/70-persistent-net.rules]
# USB device 0x:0x (rtl8723au)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"

##### dmesg #############################

########## wireless info END ############

    

Answer 1

Seu dispositivo ID 0bda:1724 Realtek Semiconductor Corp. é acionado pelo driver 8723au. Ele não está presente nativamente no Ubuntu 14.04, pelo menos na versão do kernel 3.13.0-xx. No entanto, obviamente, ele foi compilado e foi usado aqui antes porque vemos as redes que você conectou: [/ etc / NetworkManager / system-connections / dragonfly3] por exemplo. Além disso, vemos uma regra do udev:

USB device 0x:0x (rtl8723au)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?", ATTR{address}=="",ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan", NAME="wlan0"

Se você compilou o driver da fonte, é necessário recompilar quando uma versão posterior do kernel estiver instalada, por exemplo, quando o 3.13.0-44 for atualizado para xx-45. Em um terminal:

cd ~/Downloads/rtl8723au  <---or wherever the downloaded source file is located
make clean
make
sudo make install
sudo modprobe 8723au

Repita esta sequência sempre que uma versão posterior do kernel for instalada pelo Update Manager.