安装 Ubuntu 16.04 后没有网络设备

Question

最近买了一台预装了Windows 10的联想T470。我通过USB启动并行安装了Ubuntu 16.04。Wifi 连接不像在许多其他帖子中那样显示。

我的主目录是加密的，以防万一。

检查后，没有可用的 Wifi / 网络设备。

lspci -n -d 14e4

（ 没有反应 ）

iwconfig
enp0s31f6  no wireless extensions.
lo         no wireless extensions.

设置中也没有显示任何无线驱动程序。

我怀疑 Ubuntu 无法识别我的无线设备。是否有任何建议/需要更多信息来解决问题？

更新1：
在Pilot6的评论后，我再次检查，仍然没有回应。

lspci -knn | grep Net -A2

更新2：

lspci
00:00.0 Host bridge: Intel Corporation Device 5904 (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Device 5916 (rev 02)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI (rev 21)
00:1c.0 PCI bridge: Intel Corporation Device 9d10 (rev f1)
00:1c.6 PCI bridge: Intel Corporation Device 9d16 (rev f1)
00:1d.0 PCI bridge: Intel Corporation Device 9d18 (rev f1)
00:1d.2 PCI bridge: Intel Corporation Device 9d1a (rev f1)
00:1f.0 ISA bridge: Intel Corporation Device 9d58 (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Device 9d71 (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-V (rev 21)
04:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device b822
3e:00.0 Non-Volatile memory controller: Toshiba America Info Systems Device 0115 (rev 01)

lsusb
Bus 002 Device 002: ID 0bda:0316 Realtek Semiconductor Corp. 
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 04f2:b5ab Chicony Electronics Co., Ltd 
Bus 001 Device 003: ID 0bda:b023 Realtek Semiconductor Corp. 
Bus 001 Device 002: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

更新 3：在 LaunchPad 上询问后提供的更多信息

sudo lshw -C network
  *-network
       description: Ethernet interface
       product: Ethernet Connection (4) I219-V
       vendor: Intel Corporation
       physical id: 1f.6
       bus info: pci@0000:00:1f.6
       logical name: enp0s31f6
       version: 21
       serial: 54:e1:ad:1f:de:57
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k firmware=0.1-4 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:122 memory:ec200000-ec21ffff

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.2 LTS
Release:        16.04
Codename:       xenial

uname -a
Linux simon-ThinkPad-T470 4.8.0-36-generic #36~16.04.1-Ubuntu SMP Sun Feb 5 09:39:57 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

rfkill list
0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
1: tpacpi_bluetooth_sw: Bluetooth
        Soft blocked: no
        Hard blocked: no

Answer 1

由于您拥有 4.8 内核，请尝试

sudo apt-get install git build-essential
git clone https://github.com/rtlwifi-linux/rtlwifi-next.git
cd rtlwifi-next
make
sudo make install

重启

它应该在 4.8 内核编译时出现一些警告

让我们禁用模块中的省电功能

echo "options rtl8822be ips=N" | sudo tee /etc/modprobe.d/rtl8822be.conf

我们将使用下一个命令来阻止网络管理器尝试启用电源管理

sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

重启