質問: ubuntu 16.04がwifiを検出できない 私のpcはwifiを検出できません。これはsudo lshw -class networkの出力ですseng@wseng:~$ sudo lshw -class network *-network unclaimed description: network controller product: bcm43142 802.11b/g/n vendor: broadcom corporation physical id: 0 bus info: pci@0000:06:00.0 version: 01 width: 64 bits clock: 33mhz capabilities: pm msi pciexpress bus_master cap_list configuration: latency=0 resources: memory:f7200000-f7207fff *-network description: ethernet interface product: rtl8101/2/6e pci express fast/gigabit ethernet controller vendor: realtek semiconductor co., ltd. physical id: 0 bus info: pci@0000:07:00.0 logical name: enp7s0 version: 07 serial: 74:e6:e2:39:02:7c size: 100mbit/s capacity: 100mbit/s width: 64 bits clock: 33mhz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3lk-napi duplex=full firmware=rtl8106e-1_0.0.1 06/29/12 ip=192.168.1.9 latency=0 link=yes multicast=yes port=mii speed=100mbit/s resources: irq:47 ioport:e000(size=256) memory:f7100000-f7100fff memory:f2100000-f2103fff さらに情報が必要な場合はお知らせください。これはコマンドの出力ですinxi -fxseng@wseng:~$ inxi -fx system: host: wseng kernel: 4.13.0-26-generic x86_64 (64 bit gcc: 5.4.0) desktop: unity 7.4.0 (gtk 3.18.9-1ubuntu3.3) distro: ubuntu 16.04 xenial machine: system: dell (portable) product: inspiron 3543 v: a01 mobo: dell model: 04xw3r v: a00 bios: dell v: a01 date: 11/04/2014 cpu: dual core intel core i5-5200u (-ht-mcp-) cache: 3072 kb flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 8779 clock speeds: max: 2700 mhz 1: 2194 mhz 2: 2194 mhz 3: 2194 mhz 4: 2194 mhz graphics: card-1: intel broadwell-u integrated graphics bus-id: 00:02.0 card-2: nvidia gf117m [geforce 610m/710m/810m/820m / gt 620m/625m/630m/720m] bus-id: 08:00.0 display server: x.org 1.18.4 drivers: (unloaded: fbdev,vesa) failed: nouveau resolution: 1366x768@60.00hz glx renderer: mesa dri intel hd graphics 5500 (broadwell gt2) glx version: 3.0 mesa 12.0.6 direct rendering: yes audio: card-1 intel wildcat point-lp high definition audio controller driver: snd_hda_intel bus-id: 00:1b.0 card-2 intel broadwell-u audio controller driver: snd_hda_intel bus-id: 00:03.0 sound: advanced linux sound architecture v: k4.13.0-26-generic network: card-1: broadcom bcm43142 802.11b/g/n bus-id: 06:00.0 if: n/a state: n/a mac: n/a card-2: realtek rtl8101/2/6e pci express fast/gigabit ethernet controller driver: r8169 v: 2.3lk-napi port: e000 bus-id: 07:00.0 if: enp7s0 state: up speed: 100 mbps duplex: full mac: 74:e6:e2:39:02:7c drives: hdd total size: 500.1gb (27.1% used) id-1: /dev/sda model: toshiba_mq01abf0 size: 500.1gb temp: 38c partition: id-1: / size: 448g used: 116g (28%) fs: ext4 dev: /dev/sda3 id-2: swap-1 size: 11.91gb used: 0.00gb (0%) fs: swap dev: /dev/sda2 raid: no raid devices: /proc/mdstat, md_mod kernel module present sensors: system temperatures: cpu: 50.0c mobo: 27.8c fan speeds (in rpm): cpu: n/a info: processes: 242 uptime: 1 day memory: 3320.4/7889.2mb init: systemd runlevel: 5 gcc sys: 5.4.0 client: shell (bash 4.3.481) inxi: 2.2.35 seng@wseng:~$ そして、これは次のような出力via /etc/network/interfacesです。auto lo iface lo inet loopback auto eth0 iface lo inet dhcp
回答: 私はこの2つのステップでなんとか解決しました。1)bcmwl-kernel-sourceを削除しますsudo apt-get purge bcmwl-kernel-source 2)bcmwl-kernel-sourceを再インストールします。sudo apt-get update sudo apt-get install bcmwl-kernel-source