网络管理器里有无线，但是连不上WiFi路由器，搜不到WiFi网络。
uname -a：
Linux alex-Lenovo-B570e 3.5.0-26-generic #42-Ubuntu SMP Fri Mar 8 23:18:20 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
iwconfig：
eth0 no wireless extensions.
eth1 IEEE 802.11abg ESSID:off/any
Mode:Managed Access Point: Not-Associated
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
lo no wireless extensions.
rfkill list：
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: no
lspci -vnn -d 14e4：
02:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01)
Subsystem: Broadcom Corporation Device [14e4:051b]
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at d0500000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: wl
Kernel modules: wl, bcma
find /lib/modules/uname -r -name '*.ko' | grep wireless：
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/airo.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/mwl8k.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/libertas/libertas.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/libertas/usb8xxx.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/libertas/libertas_spi.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/libertas/libertas_sdio.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/libertas/libertas_cs.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/p54/p54usb.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/p54/p54common.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/p54/p54spi.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/p54/p54pci.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/brcm80211/brcmsmac/brcmsmac.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/brcm80211/brcmutil/brcmutil.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/brcm80211/brcmfmac/brcmfmac.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ipw2x00/libipw.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ipw2x00/ipw2100.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ipw2x00/ipw2200.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/mwifiex/mwifiex_pcie.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/mwifiex/mwifiex_usb.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/mwifiex/mwifiex.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/mwifiex/mwifiex_sdio.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/hostap/hostap_cs.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/hostap/hostap_pci.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/hostap/hostap_plx.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/hostap/hostap.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rtl818x/rtl8180/rtl8180.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rtl818x/rtl8187/rtl8187.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/atmel.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/iwlegacy/iwl3945.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/iwlegacy/iwlegacy.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/iwlegacy/iwl4965.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ti/wlcore/wlcore_sdio.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ti/wlcore/wlcore.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ti/wlcore/wlcore_spi.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ti/wl12xx/wl12xx.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ti/wl1251/wl1251_sdio.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ti/wl1251/wl1251_spi.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ti/wl1251/wl1251.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192cu/rtl8192cu.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192se/rtl8192se.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192de/rtl8192de.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192c/rtl8192c-common.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rtlwifi/rtlwifi.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192ce/rtl8192ce.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/zd1201.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/wl3501_cs.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/mac80211_hwsim.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rndis_wlan.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/atmel_cs.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt73usb.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt2x00lib.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt2x00pci.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt61pci.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt2x00usb.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt2800lib.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt2500usb.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt2400pci.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt2500pci.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt2800pci.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/rt2x00/rt2800usb.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/zd1211rw/zd1211rw.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/iwmc3200wifi/iwmc3200wifi.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/adm8211.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ray_cs.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/airo_cs.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/b43legacy/b43legacy.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/orinoco/orinoco.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/orinoco/orinoco_nortel.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/orinoco/orinoco_usb.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/orinoco/orinoco_plx.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/orinoco/orinoco_tmd.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/orinoco/spectrum_cs.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/orinoco/orinoco_cs.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/b43/b43.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ath/ath5k/ath5k.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ath/ath6kl/ath6kl_core.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ath/ath6kl/ath6kl_sdio.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ath/ath6kl/ath6kl_usb.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ath/carl9170/carl9170.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ath/ath.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_hw.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_common.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_htc.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/libertas_tf/libertas_tf_usb.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/libertas_tf/libertas_tf.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/atmel_pci.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/net/wireless/at76c50x-usb.ko
/lib/modules/3.5.0-26-generic/kernel/drivers/tty/ipwireless/ipwireless.ko
/lib/modules/3.5.0-26-generic/kernel/net/wireless/cfg80211.ko
/lib/modules/3.5.0-26-generic/kernel/net/wireless/lib80211_crypt_tkip.ko
/lib/modules/3.5.0-26-generic/kernel/net/wireless/lib80211_crypt_ccmp.ko
/lib/modules/3.5.0-26-generic/kernel/net/wireless/lib80211.ko
/lib/modules/3.5.0-26-generic/kernel/net/wireless/lib80211_crypt_wep.ko
sudo iwlist eth1 scan:
eth1 Interface doesn't support scanning : Invalid argument
dmesg | grep -e wl -e eth1：
[ 26.975698] wl: module license 'MIXED/Proprietary' taints kernel.
[ 27.136694] INFO @wl_cfg80211_attach : Registered CFG80211 phy
[ 27.242344] eth1: Broadcom BCM4727 802.11 Hybrid Wireless Controller 6.20.155.1 (r326264)
[ 31.754180] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 35.100996] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 58.103251] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 91.107992] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 130.258875] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 133.118953] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 156.123379] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 169.119180] ERROR @wl_dev_intvar_get : error (-1)
[ 169.119191] ERROR @wl_cfg80211_get_tx_power : error (-1)
[ 189.126384] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 411.166980] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 474.181995] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 537.180742] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 1041.020134] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 1090.432811] ERROR @wl_dev_intvar_get : error (-1)
[ 1090.432822] ERROR @wl_cfg80211_get_tx_power : error (-1)
[ 1104.003465] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
[ 1166.980306] ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
答案1
尝试安装您的无线接口的驱动程序（BCM4313如您所说）。
将计算机连接到可用的以太网连接。然后执行以下操作：
- 打开
System Settings。 - 点击
Additional Drivers - 为您的无线接口安装列出的专有驱动程序。
希望这能解决你的问题！