我知道论坛上已经讨论过这个问题，但似乎没有具体的答案。我的 HP 台式机（Ubuntu Desktop 14.04 LTS）上有 BCM43142 无线网卡。Wifi 工作正常，但过了一段时间（6 小时以上）后，连接变得非常慢，最后无法工作。
# lspci | grep -i network
04:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)
########## wireless info START ##########
Report from: 21 Feb 2016 19:27 MST -0700
Booted last: 21 Feb 2016 19:15 MST -0700
Script from: 27 Sep 2015 00:34 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 14.04.4 LTS
Release: 14.04
Codename: trusty
##### kernel ############################
Linux 3.19.0-49-generic #55~14.04.1-Ubuntu SMP Fri Jan 22 11:24:31 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
sed: can't read /root/.dmrc: No such file or directory
Could not be determined.
##### lspci #############################
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0c)
Subsystem: Hewlett-Packard Company Device [103c:2af3]
Kernel driver in use: r8169
04:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
Subsystem: Hewlett-Packard Company Device [103c:2230]
Kernel driver in use: wl
##### lsusb #############################
Bus 004 Device 002: ID 8087:8000 Intel Corp.
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 8087:8008 Intel Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 046d:0825 Logitech, Inc. Webcam C270
Bus 001 Device 006: ID 0a5c:216c Broadcom Corp.
Bus 001 Device 005: ID 058f:6362 Alcor Micro Corp. Flash Card Reader/Writer
Bus 001 Device 004: ID 0458:0146 KYE Systems Corp. (Mouse Systems)
Bus 001 Device 002: ID 0461:4e24 Primax Electronics, Ltd
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: hci0: Bluetooth
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
##### lsmod #############################
wl 6369280 0
hp_wmi 16384 0
sparse_keymap 16384 1 hp_wmi
cfg80211 524288 1 wl
wmi 20480 1 hp_wmi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
docker0 Link encap:Ethernet HWaddr <MAC 'docker0' [IF]>
inet addr:172.17.42.1 Bcast:0.0.0.0 Mask:255.255.0.0
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:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
eth0 Link encap:Ethernet HWaddr <MAC 'eth0' [IF]>
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)
vmnet1 Link encap:Ethernet HWaddr <MAC 'vmnet1' [IF]>
inet addr:172.16.170.1 Bcast:172.16.170.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
vmnet8 Link encap:Ethernet HWaddr <MAC 'vmnet8' [IF]>
inet addr:192.168.172.1 Bcast:192.168.172.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
wlan0 Link encap:Ethernet HWaddr <MAC 'wlan0' [IF]>
inet addr:192.168.0.105 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:61457 errors:0 dropped:0 overruns:0 frame:19547
TX packets:41711 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:71225715 (71.2 MB) TX bytes:18230947 (18.2 MB)
Interrupt:19
##### iwconfig ##########################
eth0 no wireless extensions.
vmnet1 no wireless extensions.
docker0 no wireless extensions.
vmnet8 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11abg ESSID:"TP-LINK_536C"
Mode:Managed Frequency:2.417 GHz Access Point: <MAC 'TP-LINK_536C' [AC1]>
Bit Rate=72 Mb/s Tx-Power=200 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=70/70 Signal level=-38 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
##### 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 wlan0
172.16.170.0 0.0.0.0 255.255.255.0 U 0 0 0 vmnet1
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
192.168.0.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0
192.168.172.0 0.0.0.0 255.255.255.0 U 0 0 0 vmnet8
##### resolv.conf #######################
nameserver 127.0.1.1
##### network managers ##################
Installed:
NetworkManager
Running:
root 1269 1 0 19:15 ? 00:00:00 NetworkManager
##### NetworkManager info ###############
NetworkManager Tool
State: connected (global)
- Device: wlan0 [TP-LINK_536C] ------------------------------------------------
Type: 802.11 WiFi
Driver: wl
State: connected
Default: yes
HW Address: <MAC 'wlan0' [IF]>
Capabilities:
Speed: 72 Mb/s
Wireless Properties
WEP Encryption: yes
WPA Encryption: yes
WPA2 Encryption: yes
Wireless Access Points (* = current AP)
Nitin: Infra, <MAC 'Nitin' [AC5]>, Freq 2462 MHz, Rate 54 Mb/s, Strength 94 WPA WPA2
0493E6: Infra, <MAC '0493E6' [AC2]>, Freq 2412 MHz, Rate 54 Mb/s, Strength 89 WPA WPA2
ChacheNetwork: Infra, <MAC 'ChacheNetwork' [AC4]>, Freq 2462 MHz, Rate 54 Mb/s, Strength 79 WPA WPA2
HOME-EE12: Infra, <MAC 'HOME-EE12' [AC3]>, Freq 2437 MHz, Rate 54 Mb/s, Strength 75 WPA WPA2
Satnam_N: Infra, <MAC 'Satnam_N' [AN5]>, Freq 2427 MHz, Rate 54 Mb/s, Strength 70 WPA2
1C1106: Infra, <MAC '1C1106' [AC6]>, Freq 2462 MHz, Rate 54 Mb/s, Strength 55 WPA WPA2
*TP-LINK_536C: Infra, <MAC 'TP-LINK_536C' [AC1]>, Freq 2417 MHz, Rate 54 Mb/s, Strength 81 WPA WPA2
IPv4 Settings:
Address: 192.168.0.105
Prefix: 24 (255.255.255.0)
Gateway: 192.168.0.1
DNS: 192.168.0.1
- Device: eth0 -----------------------------------------------------------------
Type: Wired
Driver: r8169
State: unavailable
Default: no
HW Address: <MAC 'eth0' [IF]>
Capabilities:
Carrier Detect: yes
Wired Properties
Carrier: off
##### 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 ###########
[[/etc/NetworkManager/system-connections/TP-LINK_536C]] (600 root)
[connection] id=TP-LINK_536C | type=802-11-wireless
[802-11-wireless] ssid=TP-LINK_536C
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/TP-LINK_536C 1]] (600 root)
[connection] id=TP-LINK_536C 1 | type=802-11-wireless
[802-11-wireless] ssid=TP-LINK_536C | mac-address=<MAC 'wlan0' [IF]>
[ipv6] method=auto
[ipv4] method=auto
##### iw reg get ########################
Region: America/Phoenix (based on set time zone)
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
##### iwlist channels ###################
eth0 no frequency information.
vmnet1 no frequency information.
docker0 no frequency information.
vmnet8 no frequency information.
lo no frequency information.
wlan0 26 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Channel 14 : 2.484 GHz
Channel 36 : 5.18 GHz
Channel 38 : 5.19 GHz
Channel 40 : 5.2 GHz
Channel 42 : 5.21 GHz
Channel 44 : 5.22 GHz
Channel 46 : 5.23 GHz
Channel 48 : 5.24 GHz
Channel 149 : 5.745 GHz
Channel 153 : 5.765 GHz
Channel 157 : 5.785 GHz
Channel 161 : 5.805 GHz
Channel 165 : 5.825 GHz
Current Frequency:2.417 GHz (Channel 2)
##### iwlist scan #######################
eth0 Interface doesn't support scanning.
vmnet1 Interface doesn't support scanning.
docker0 Interface doesn't support scanning.
vmnet8 Interface doesn't support scanning.
lo Interface doesn't support scanning.
Channel occupancy:
1 APs on Frequency:2.412 GHz (Channel 1)
1 APs on Frequency:2.417 GHz (Channel 2)
1 APs on Frequency:2.437 GHz (Channel 6)
3 APs on Frequency:2.462 GHz (Channel 11)
wlan0 Scan completed :
Cell 01 - Address: <MAC 'TP-LINK_536C' [AC1]>
Channel:2
Frequency:2.417 GHz (Channel 2)
Quality=70/70 Signal level=-39 dBm
Encryption key:on
ESSID:"TP-LINK_536C"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000000000000000
Extra: Last beacon: 48ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Cell 02 - Address: <MAC '0493E6' [AC2]>
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=64/70 Signal level=-46 dBm
Encryption key:on
ESSID:"0493E6"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000000000000000
Extra: Last beacon: 48ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
Cell 03 - Address: <MAC 'HOME-EE12' [AC3]>
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=59/70 Signal level=-51 dBm
Encryption key:on
ESSID:"HOME-EE12"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
18 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000000000000000
Extra: Last beacon: 48ms ago
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : TKIP CCMP
Authentication Suites (1) : PSK
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : TKIP CCMP
Authentication Suites (1) : PSK
Cell 04 - Address: <MAC 'ChacheNetwork' [AC4]>
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=56/70 Signal level=-54 dBm
Encryption key:on
ESSID:"ChacheNetwork"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000000000000000
Extra: Last beacon: 48ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
Cell 05 - Address: <MAC 'Nitin' [AC5]>
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=62/70 Signal level=-48 dBm
Encryption key:on
ESSID:"Nitin"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000000000000000
Extra: Last beacon: 48ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
Cell 06 - Address: <MAC '1C1106' [AC6]>
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=45/70 Signal level=-65 dBm
Encryption key:on
ESSID:"1C1106"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000000000000000
Extra: Last beacon: 48ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
##### module infos ######################
[wl]
filename: /lib/modules/3.19.0-49-generic/updates/dkms/wl.ko
license: MIXED/Proprietary
srcversion: 9A49255BA90267D99664757
depends: cfg80211
vermagic: 3.19.0-49-generic SMP mod_unload modversions
parm: passivemode:int
parm: wl_txq_thresh:int
parm: oneonly:int
parm: piomode:int
parm: instance_base:int
parm: nompc:int
parm: intf_name:string
[cfg80211]
filename: /lib/modules/3.19.0-49-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: EF182B558008C23DD85EF03
depends:
intree: Y
vermagic: 3.19.0-49-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: A9:32:DC:23:78:95:A4:4D:39:59:BF:91:A3:56:6A:20:EE:21:1F:37
sig_hashalgo: sha512
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
##### module parameters #################
[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
lp
rtc
##### modprobe options ##################
[/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/blacklist-nouveau.conf]
blacklist nouveau
blacklist lbm-nouveau
options nouveau modeset=0
alias nouveau off
alias lbm-nouveau off
[/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
[/etc/modprobe.d/nouveau-kms.conf]
options nouveau modeset=0
options nouveau modeset=0
[/etc/modprobe.d/vmware-fuse.conf]
alias char-major-10-229 fuse
##### rc.local ##########################
/opt/redislabs/sbin/systune.sh
exit 0
##### pm-utils ##########################
##### udev rules ########################
[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x14e4:0x4365 (wl)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'wlan0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
##### dmesg #############################
[ 30.353103] bridge-wlan0: device is wireless, enabling SMAC
[ 30.353105] bridge-wlan0: up
[ 30.353107] bridge-wlan0: attached
########## wireless info END ############
但对我来说似乎不起作用。我需要每 6-8 小时重新启动系统。
这是我的设置-->附加驱动程序
按照我的说法，我正在使用正确的驱动程序，但为什么它会在 6-8 小时后断开连接？