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无线连不上，求大神帮忙看看什么问题...在U盘插在电脑准备装前，进入安装目录时候无线还是可以联网的，但是装好系统后无线就连不上了：
系统：Ubuntu 14.04 LTS

root@l-1215B-1215B:/home/l# sudo lshw -numeric -class network
*-network
description: Wireless interface
product: BCM4313 802.11bgn Wireless Network Adapter [14E4:4727]
vendor: Broadcom Corporation [14E4]
physical id: 0
bus info: pci@0000:01:00.0
logical name: wlan0
version: 01
serial: 48:5d:60:fd:72:7b
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.141 (r415941) latency=0 multicast=yes wireless=IEEE 802.11abg
resources: irq:16 memory:fea00000-fea03fff
*-network
description: Ethernet interface
product: AR8152 v2.0 Fast Ethernet [1969:2062]
vendor: Qualcomm Atheros [1969]
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: c1
serial: f4:6d:04:bf:7c:20
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.1-NAPI latency=0 link=no multicast=yes port=twisted pair
resources: irq:45 memory:fe900000-fe93ffff ioport:e000(size=128)
root@l-1215B-1215B:/home/l# uname -a
Linux l-1215B-1215B 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:12 UTC 2014 i686 athlon i686 GNU/Linux
root@l-1215B-1215B:/home/l# sudo ifconfig -a
eth0 Link encap:以太网 硬件地址 f4:6d:04:bf:7c:20
UP BROADCAST MULTICAST MTU:1500 跃点数:1
接收数据包:0 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:0 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:1000
接收字节:0 (0.0 B) 发送字节:0 (0.0 B)

lo Link encap:本地环回
inet 地址:127.0.0.1 掩码:255.0.0.0
inet6 地址: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 跃点数:1
接收数据包:165 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:165 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:0
接收字节:11839 (11.8 KB) 发送字节:11839 (11.8 KB)

wlan0 Link encap:以太网 硬件地址 48:5d:60:fd:72:7b
inet6 地址: fe80::4a5d:60ff:fefd:727b/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 跃点数:1
接收数据包:71 错误:0 丢弃:0 过载:0 帧数:26538
发送数据包:133 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:1000
接收字节:4611 (4.6 KB) 发送字节:26245 (26.2 KB)
中断:16

root@l-1215B-1215B:/home/l# sudo route -nv
内核 IP 路由表
目标 网关 子网掩码 标志 跃点 引用 使用 接口
root@l-1215B-1215B:/home/l# sudo dhclient -v
Internet Systems Consortium DHCP Client 4.2.4
Copyright 2004-2012 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

No broadcast interfaces found - exiting.
root@l-1215B-1215B:/home/l#
----------------
安装后：
01:00.0 Network controller: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01)
Subsystem: AzureWave Device 2047
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at fea00000 (64-bit, non-prefetchable)
Capabilities: [40] Power Management version 3
Capabilities: [58] Vendor Specific Information: Len=78 <?>
Capabilities: [48] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [d0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [13c] Virtual Channel
Capabilities: [160] Device Serial Number 00-00-60-ff-ff-fd-48-5d
Capabilities: [16c] Power Budgeting <?>
Kernel driver in use: wl
-------
安装前： 看到kernel driver in use不一样。。
01:00.0 Network controller: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01)
Subsystem: AzureWave Device 2047
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at fea00000 (64-bit, non-prefetchable)
Capabilities: [40] Power Management version 3
Capabilities: [58] Vendor Specific Information: Len=78 <?>
Capabilities: [48] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [d0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [13c] Virtual Channel
Capabilities: [160] Device Serial Number 00-00-60-ff-ff-fd-48-5d
Capabilities: [16c] Power Budgeting <?>
Kernel driver in use: bcma-pci-bridge

01:00.0 Network controller: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01)
安装后：
Kernel driver in use: wl
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.141 (r415941) latency=0 multicast=yes wireless=IEEE 802.11abg
安装前：
Kernel driver in use: bcma-pci-bridge

https://help.ubuntu.com/community/WifiD ... er/bcm43xx
1. wl 閉源驅動 支援 BCM4313
nstall either bcmwl-kernel-source (instructions below) OR the broadcom-sta (instructions at http://wiki.debian.org/wl) packages.
2. brcmsmac (a.k.a brcm80211) 開源驅動
3. 已知問題及處理方法
https://help.ubuntu.com/community/WifiD ... own_Issues
3-1. 參考 3
把 wl0 也列入載入黑名單
4. 使用 開源驅動 就好
http://wireless.kernel.org/en/users/Drivers/brcm80211

有点不太懂额。。。能帮忙解释下么。。

1. BCM4313 可以使用 開源驅動 brcmsmac 也能使用 閉源驅動 wl 但是同一時間只能使用其中一種 另外一種 需要卸除安裝或列入載入黑名單
2. 但是 閉源驅動 wl 在 BCM4313 還有需多問題 所以 建議使用 開源驅動 brcmsmac
3. 開源驅動 網頁
http://wireless.kernel.org/en/users/Drivers/brcm80211
3-1. 支援 BCM4313
http://wireless.kernel.org/en/users/Dri ... rted_Chips
3-2. 開源驅動
http://wireless.kernel.org/en/users/Dri ... mac_driver
3-3. firmware (指已經研發出來的驅動但是還沒進入 Linux Kernel)
http://wireless.kernel.org/en/users/Dri ... stallation

电脑被我整得开不了了，后来重装了下，系统自动安装成Kernel driver in use: bcma-pci-bridge
但是出现把无线断开后就连不上。
然后按照：https://help.ubuntu.com/community/WifiD ... own_Issues
---------------------------
Then you need to blacklist b43 and wl driver like this:

echo "blacklist b43" | sudo tee -a /etc/modprobe.d/blacklist.conf
echo "blacklist wl" | sudo tee -a /etc/modprobe.d/blacklist.conf

sudo modprobe -r b43 wl brcmsmac
sudo modprobe brcmsmac
echo "brcmsmac" | sudo tee -a /etc/modules
--------------------------
按上述弄了下就ok了，无线联网正常。
用上后测试了下，打开firefox浏览器打开百度图片，正常情况下cpu双核都在15%左右，开了浏览器，加载多图时候cpu就往上飙。。双核都达到五六十，高的时候八九十，产生热量大，一会儿电脑就卡死了。。。
cpu 双核1.6GHz,eeepc 1215B好像也叫做APU，2G内存。
今晚回去再打开看看。。。

恭喜你