以下是从其他论坛建议中提取的无线相关信息。看起来像是内核问题，但我不知道如何解决。感谢您的任何建议。
########## wireless info START ##########
##### release #####
Distributor ID: Ubuntu
Description: Ubuntu 14.04 LTS
Release: 14.04
Codename: trusty
##### kernel #####
Linux john-Vostro-1400 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:08:14 UTC 2014 i686 i686 i686 GNU/Linux
##### lspci #####
09:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM5906M Fast Ethernet PCI Express [14e4:1713] (rev 02)
Subsystem: Dell Device [1028:0227]
Kernel driver in use: tg3
0c:00.0 Network controller [0280]: Broadcom Corporation BCM4311 802.11b/g WLAN [14e4:4311] (rev 01)
Subsystem: Dell Wireless 1390 WLAN Mini-Card [1028:0007]
Kernel driver in use: wl
##### lsusb #####
Bus 002 Device 002: ID 05a9:2640 OmniVision Technologies, Inc. OV2640 Webcam
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
##### PCMCIA Card Info #####
##### rfkill #####
##### iw reg get #####
country 00:
(2402 - 2472 @ 40), (3, 20)
(2457 - 2482 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
(2474 - 2494 @ 20), (3, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS
(5170 - 5250 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
(5735 - 5835 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS
##### interfaces #####
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
##### iwconfig #####
##### route #####
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
##### resolv.conf #####
nameserver 127.0.1.1
search ph.cox.net
##### nm-tool #####
NetworkManager Tool
State: connected (global)
- Device: eth0 [Wired connection 1] -------------------------------------------
Type: Wired
Driver: tg3
State: connected
Default: yes
HW Address: <MAC address removed>
Capabilities:
Carrier Detect: yes
Speed: 100 Mb/s
Wired Properties
Carrier: on
IPv4 Settings:
Address: 192.168.0.105
Prefix: 24 (255.255.255.0)
Gateway: 192.168.0.1
DNS: 192.168.0.1
##### NetworkManager.state #####
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
##### NetworkManager.conf #####
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
##### iwlist #####
##### iwlist channel #####
##### lsmod #####
ssb 51854 1
wl 3999690 1
lib80211 14040 1 wl
cfg80211 409394 1 wl
##### modinfo #####
filename: /lib/modules/3.13.0-24-generic/kernel/drivers/ssb/ssb.ko
license: GPL
description: Sonics Silicon Backplane driver
srcversion: 3DE188310F77C566C2E8CB3
alias: pci:v000014E4d00004350sv*sd*bc*sc*i*
alias: pci:v000014E4d0000432Csv*sd*bc*sc*i*
alias: pci:v000014E4d0000432Bsv*sd*bc*sc*i*
alias: pci:v000014E4d00004329sv*sd*bc*sc*i*
alias: pci:v000014E4d00004328sv*sd*bc*sc*i*
alias: pci:v000014E4d00004325sv*sd*bc*sc*i*
alias: pci:v000014E4d00004324sv*sd*bc*sc*i*
alias: pci:v000014E4d0000A8D6sv*sd*bc*sc*i*
alias: pci:v000014E4d00004322sv*sd*bc*sc*i*
alias: pci:v000014E4d00004321sv*sd*bc*sc*i*
alias: pci:v000014E4d00004320sv*sd*bc*sc*i*
alias: pci:v000014E4d00004319sv*sd*bc*sc*i*
alias: pci:v000014A4d00004318sv*sd*bc*sc*i*
alias: pci:v000014E4d00004318sv*sd*bc*sc*i*
alias: pci:v000014E4d00004315sv*sd*bc*sc*i*
alias: pci:v000014E4d00004312sv*sd*bc*sc*i*
alias: pci:v000014E4d00004311sv*sd*bc*sc*i*
alias: pci:v000014E4d00004307sv*sd*bc*sc*i*
alias: pci:v000014E4d00004306sv*sd*bc*sc*i*
alias: pci:v000014E4d00004301sv*sd*bc*sc*i*
depends:
intree: Y
vermagic: 3.13.0-24-generic SMP mod_unload modversions 686
signer: Magrathea: Glacier signing key
sig_key: <MAC address removed>:96:DC:92:B0:1D:75:9D:3E:85:62:EA:32:A1:C7
sig_hashalgo: sha512
filename: /lib/modules/3.13.0-24-generic/updates/dkms/wl.ko
license: MIXED/Proprietary
srcversion: FF25FE784DC6BDFF69DAFCB
alias: pci:v*d*sv*sd*bc02sc80i*
depends: cfg80211,lib80211
vermagic: 3.13.0-24-generic SMP mod_unload modversions 686
parm: wl_txq_thresh:int
parm: oneonly:int
parm: piomode:int
parm: instance_base:int
parm: nompc:int
parm: intf_name:string
##### modules #####
lp
##### blacklist #####
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/etc/modprobe.d/blacklist-bcm43.conf]
blacklist b43
blacklist b43legacy
blacklist ssb
blacklist bcm43xx
blacklist brcm80211
blacklist brcmfmac
blacklist brcmsmac
blacklist bcma
[/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/fbdev-blacklist.conf]
blacklist arkfb
blacklist aty128fb
blacklist atyfb
blacklist radeonfb
blacklist cirrusfb
blacklist cyber2000fb
blacklist gx1fb
blacklist gxfb
blacklist kyrofb
blacklist matroxfb_base
blacklist mb862xxfb
blacklist neofb
blacklist nvidiafb
blacklist pm2fb
blacklist pm3fb
blacklist s3fb
blacklist savagefb
blacklist sisfb
blacklist tdfxfb
blacklist tridentfb
blacklist viafb
blacklist vt8623fb
##### udev rules #####
# PCI device 0x14e4:0x1713 (tg3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address removed>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
##### dmesg #####
[ 16.289874] wl: module license 'MIXED/Proprietary' taints kernel.
[ 16.302998] wl: module verification failed: signature and/or required key missing - tainting kernel
[ 16.384641] wl driver 6.30.223.141 (r415941) failed with code 21
[ 16.384690] Modules linked in: snd_pcm dell_wmi videodev wl(POF+) gpio_ich sparse_keymap snd_page_alloc snd_seq_midi nouveau(+) snd_seq_midi_event snd_rawmidi snd_seq r852 sm_common mxm_wmi snd_seq_device nand ttm snd_timer nand_ecc drm_kms_helper dell_laptop nand_bch lib80211 bch dcdbas drm snd r592 nand_ids soundcore psmouse mtd i2c_algo_bit cfg80211 memstick coretemp serio_raw lpc_ich wmi mac_hid video parport_pc ppdev lp parport firewire_ohci tg3 firewire_core ahci ptp libahci sdhci_pci crc_itu_t sdhci pps_core
[ 16.384855] EIP is at wdev_priv.part.9+0x3/0x5 [wl]
[ 16.384986] [<fc5589d7>] wl_cfg80211_detach+0xf7/0x100 [wl]
[ 16.385042] [<fc5513c3>] wl_free_if.isra.12+0x23/0xa0 [wl]
[ 16.385097] [<fc551a68>] wl_free+0x78/0x260 [wl]
[ 16.385174] [<fc551f5e>] wl_pci_probe+0x30e/0x630 [wl]
[ 16.385340] [<f84e2017>] wl_module_init+0x17/0x1000 [wl]
[ 16.385504] EIP: [<fc558fb6>] wdev_priv.part.9+0x3/0x5 [wl] SS:ESP 0068:f2cadbbc
########## wireless info END ############
答案1
Broadcom 专有驱动程序不适合您设备。请连接以太网，打开终端并执行以下操作：
sudo apt-get purge bcmwl-kernel-source
sudo apt-get update
sudo apt-get install linux-firmware-nonfree
断开以太网，重新启动并让我们听取您的报告。