我使用的是联想 G480，昨天刚刚安装了 Ubuntu 12.04 LTS（与 Windows 7 双启动）。我的 wifi 连接每 5 到 10 分钟就会连接和断开一次。我是 Linux 新手，我不知道如何解决这个问题。有人能帮忙吗？
lspci：
00:00.0 Host bridge: Intel Corporation Ivy Bridge DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Ivy Bridge PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09)
00:14.0 USB controller: Intel Corporation Panther Point USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation Panther Point MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 1 (rev c4)
00:1c.1 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 2 (rev c4)
00:1c.3 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 4 (rev c4)
00:1d.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Panther Point LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation Panther Point 6 port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation Panther Point SMBus Controller (rev 04)
01:00.0 VGA compatible controller: NVIDIA Corporation Device 1058 (rev a1)
03:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01)
04:00.0 Ethernet controller: Atheros Communications Inc. AR8162 Fast Ethernet (rev 10)
sudo lshw -C 网络
*-network
description: Network controller
product: BCM4313 802.11b/g/n Wireless LAN Controller
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
version: 01
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=bcma-pci-bridge latency=0
resources: irq:17 memory:eb500000-eb503fff
*-network
description: Ethernet interface
product: AR8162 Fast Ethernet
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:04:00.0
logical name: eth0
version: 10
serial: 3c:97:0e:19:f2:bf
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=alx driverversion=1.2.3 firmware=N/A latency=0 link=no multicast=yes port=twisted pair
resources: irq:19 memory:eb400000-eb43ffff ioport:2000(size=128)
*-network
description: Wireless interface
physical id: 3
logical name: wlan0
serial: 08:ed:b9:a5:9b:a1
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=brcmsmac driverversion=3.5.0-34-generic firmware=N/A ip=192.168.254.101 link=yes multicast=yes wireless=IEEE 802.11bgn
lsmod：
Module Size Used by
nls_utf8 12558 1
isofs 40307 1
snd_hda_codec_hdmi 32476 1
snd_hda_codec_realtek 79855 1
joydev 17694 0
rfcomm 47562 0
bnep 18240 2
parport_pc 32867 0
ppdev 17114 0
lp 17800 0
parport 46563 3 parport_pc,ppdev,lp
coretemp 13642 0
kvm 422160 0
ghash_clmulni_intel 13221 0
arc4 12530 2
aesni_intel 51134 2
cryptd 20531 2 ghash_clmulni_intel,aesni_intel
aes_x86_64 17256 1 aesni_intel
brcmsmac 541775 0
mac80211 555272 1 brcmsmac
brcmutil 14756 1 brcmsmac
cfg80211 208382 2 brcmsmac,mac80211
cordic 12575 1 brcmsmac
snd_hda_intel 34063 3
snd_hda_codec 135141 3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 17765 1 snd_hda_codec
snd_pcm 97523 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_seq_midi 13325 0
snd_rawmidi 30750 1 snd_seq_midi
snd_seq_midi_event 14900 1 snd_seq_midi
snd_seq 61931 2 snd_seq_midi,snd_seq_midi_event
snd_timer 29990 2 snd_pcm,snd_seq
snd_seq_device 14498 3 snd_seq_midi,snd_rawmidi,snd_seq
btusb 22432 0
bluetooth 211812 14 rfcomm,bnep,btusb
alx 73500 0
uvcvideo 78117 0
mdio 13808 1 alx
videobuf2_core 33025 1 uvcvideo
videodev 125126 2 uvcvideo,videobuf2_core
videobuf2_vmalloc 12861 1 uvcvideo
videobuf2_memops 13405 1 videobuf2_vmalloc
microcode 23030 0
snd 83674 16 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
psmouse 102506 0
serio_raw 13216 0
lpc_ich 17145 0
bcma 35762 1 brcmsmac
mei 41410 0
ideapad_laptop 18235 0
soundcore 15092 1 snd
snd_page_alloc 18573 2 snd_hda_intel,snd_pcm
sparse_keymap 13891 1 ideapad_laptop
nouveau 924024 1
ttm 88495 1 nouveau
mxm_wmi 13022 1 nouveau
mac_hid 13254 0
wmi 19257 2 nouveau,mxm_wmi
i915 535221 3
drm_kms_helper 49259 2 nouveau,i915
drm 290059 7 nouveau,ttm,i915,drm_kms_helper
i2c_algo_bit 13565 2 nouveau,i915
video 19653 2 nouveau,i915
usb_storage 49288 0
ahci 25869 2
libahci 27338 1 ahci
谢谢。非常感谢您的帮助。上帝保佑 :)
答案1
尝试安装该linux-firmware-nonfree包：
sudo apt-get install linux-firmware-nonfree