是的，有很多相同的问题，我至少读了 15 个论坛帖子。但没有结果。操作系统：12.10
我有类似这个帖子的问题，所以更新到新内核后，wifi就消失了。： Broadcom BCM4313 的无线问题
但下载并安装 Dimitar 链接的 .deb 包并没有解决问题。该wl.ko文件位于/lib/modules/3.5.0-21-generic/updates/dkms/文件夹中。
运行重新安装命令，得到以下内容：（sudo apt-get --reinstall install bcmwl-kernel-source来自官方指南）
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
calligra-l10n-engb cdparanoia k3b k3b-data k3b-i18n kde-l10n-engb
kde-l10n-zhcn kdevelop-l10n kdevelop-php-docs-l10n kdevelop-php-l10n
language-pack-kde-en libasprintf0c2:i386 libcroco3:i386 libflac++6
libgettextpo0:i386 libgomp1:i386 libk3b6 libkcddb4 libunistring0:i386
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 1 not upgraded.
Need to get 0 B/1,181 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 202169 files and directories currently installed.)
Preparing to replace bcmwl-kernel-source 5.100.82.112+bdcom-0ubuntu3 (using .../bcmwl-kernel-source_5.100.82.112+bdcom-0ubuntu3_amd64.deb) ...
Removing all DKMS Modules
Done.
Unpacking replacement bcmwl-kernel-source ...
Setting up bcmwl-kernel-source (5.100.82.112+bdcom-0ubuntu3) ...
Loading new bcmwl-5.100.82.112+bdcom DKMS files...
Building only for 3.5.0-21-generic
Building for architecture x86_64
Building initial module for 3.5.0-21-generic
Done.
wl:
Running module version sanity check.
- Original module
- No original module exists within this kernel
- Installation
- Installing to /lib/modules/3.5.0-21-generic/updates/dkms/
depmod....
DKMS: install completed.
ERROR: Module b43 does not exist in /proc/modules
ERROR: Module b43legacy does not exist in /proc/modules
ERROR: Module ssb does not exist in /proc/modules
ERROR: Module bcm43xx does not exist in /proc/modules
ERROR: Module brcm80211 does not exist in /proc/modules
ERROR: Module brcmfmac does not exist in /proc/modules
ERROR: Module brcmsmac does not exist in /proc/modules
ERROR: Module bcma does not exist in /proc/modules
FATAL: Error inserting wl (/lib/modules/3.5.0-21-generic/updates/dkms/wl.ko): Invalid argument
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools ...
update-initramfs: Generating /boot/initrd.img-3.5.0-21-generic
更多测试：
lspci -vvnn | grep 14e4：
03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01)
Subsystem: Broadcom Corporation Device [14e4:0587]
iwconfig：
eth1 no wireless extensions.
lo no wireless extensions.
rfkill list all：
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
lsmod：
Module Size Used by
nls_iso8859_1 12713 1
rfcomm 42651 0
bnep 18140 2
parport_pc 32688 0
ppdev 17073 0
bluetooth 204950 10 rfcomm,bnep
ip6t_REJECT 12574 1
usb_storage 48838 1
uas 17844 0
xt_hl 12521 6
ip6t_rt 12558 3
nf_conntrack_ipv6 14054 7
nf_defrag_ipv6 13158 1 nf_conntrack_ipv6
ipt_REJECT 12541 1
xt_LOG 17349 10
xt_limit 12711 13
xt_tcpudp 12603 18
snd_hda_codec_hdmi 32007 1
snd_hda_codec_conexant 57842 1
xt_addrtype 12635 4
binfmt_misc 17500 1
xt_state 12578 14
ip6table_filter 12815 1
ip6_tables 27207 2 ip6t_rt,ip6table_filter
nf_conntrack_netbios_ns 12665 0
nouveau 895609 0
nf_conntrack_broadcast 12589 1 nf_conntrack_netbios_ns
nf_nat_ftp 12649 0
nf_nat 25254 1 nf_nat_ftp
nf_conntrack_ipv4 14480 9 nf_nat
nf_defrag_ipv4 12729 1 nf_conntrack_ipv4
nf_conntrack_ftp 13359 1 nf_nat_ftp
nf_conntrack 82633 8 nf_conntrack_ipv6,xt_state,nf_conntrack_netbios_ns,nf_conntrack_broadcast,nf_nat_ftp,nf_nat,nf_conntrack_ipv4,nf_conntrack_ftp
uvcvideo 76749 0
iptable_filter 12810 1
ip_tables 26995 1 iptable_filter
coretemp 13400 0
videobuf2_core 32851 1 uvcvideo
videodev 120309 2 uvcvideo,videobuf2_core
snd_hda_intel 33491 3
snd_hda_codec 134212 3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
i915 520539 3
videobuf2_vmalloc 12860 1 uvcvideo
joydev 17457 0
x_tables 29711 13 ip6t_REJECT,xt_hl,ip6t_rt,ipt_REJECT,xt_LOG,xt_limit,xt_tcpudp,xt_addrtype,xt_state,ip6table_filter,ip6_tables,iptable_filter,ip_tables
videobuf2_memops 13368 1 videobuf2_vmalloc
ttm 83595 1 nouveau
kvm 414070 0
snd_hwdep 13602 1 snd_hda_codec
rts5139 356158 0
snd_pcm 96580 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
drm_kms_helper 49112 2 nouveau,i915
alx 81256 0
lib80211 14381 0
compat 14949 5 rfcomm,bnep,bluetooth,alx,lib80211
ghash_clmulni_intel 13180 0
drm 288670 6 nouveau,i915,ttm,drm_kms_helper
snd_seq_midi 13324 0
snd_rawmidi 30512 1 snd_seq_midi
snd_seq_midi_event 14899 1 snd_seq_midi
snd_seq 61521 2 snd_seq_midi,snd_seq_midi_event
snd_timer 29425 2 snd_pcm,snd_seq
snd_seq_device 14497 3 snd_seq_midi,snd_rawmidi,snd_seq
mei 40690 0
mxm_wmi 12979 1 nouveau
snd 78734 16 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
psmouse 95552 0
ideapad_laptop 18086 0
wmi 19070 2 nouveau,mxm_wmi
lpc_ich 17061 0
i2c_algo_bit 13413 2 nouveau,i915
serio_raw 13215 0
sparse_keymap 13890 1 ideapad_laptop
mac_hid 13205 0
soundcore 15047 1 snd
snd_page_alloc 18484 2 snd_hda_intel,snd_pcm
cryptd 20403 1 ghash_clmulni_intel
video 19335 2 nouveau,i915
microcode 22803 0
lp 17759 0
parport 46345 3 parport_pc,ppdev,lp
答案1
解决了我的问题。使用上面的论坛帖子，卸载 linux-backports，然后重启后，我现在又有了 wifi。因此，工作的驱动程序是 Broadcom STA，但没有 backports。http://ubuntuforums.org/showthread.php?p=12475295也感谢 chili555 在这里和数百个论坛帖子中提出的建议:)