我刚刚在这台机器上安装了 Linux mint，但无线连接开箱即用时无法正常工作。您可以在下面找到更多信息：
########## wireless info START ##########
Report from: 30 Apr 2019 14:50 AEST +1000
Booted last: 30 Apr 2019 00:00 AEST +1000
Script from: 22 Oct 2018 03:34 UTC +0000
##### release ###########################
Distributor ID: LinuxMint
Description: Linux Mint 19.1 Tessa
Release: 19.1
Codename: tessa
##### kernel ############################
Linux 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=1
##### desktop ###########################
Cinnamon
##### lspci #############################
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10)
Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [17aa:5068]
Kernel driver in use: r8169
05:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:b822]
Subsystem: Lenovo Device [17aa:b023]
Kernel modules: r8822be
##### lsusb #############################
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 06cb:00a2 Synaptics, Inc.
Bus 001 Device 003: ID 5986:2113 Acer, Inc
Bus 001 Device 005: ID 0bda:b023 Realtek Semiconductor Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
##### secure boot #######################
SecureBoot enabled
##### lsmod #############################
mac80211 778240 0
cfg80211 622592 1 mac80211
intel_wmi_thunderbolt 16384 0
wmi_bmof 16384 0
wmi 24576 2 wmi_bmof,intel_wmi_thunderbolt
##### interfaces ########################
[/etc/network/interfaces]
auto lo
iface lo inet loopback
##### ifconfig ##########################
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback <MAC address> brd <MAC address>
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether <MAC 'enp3s0' [IF1]> brd <MAC address>
inet 192.168.1.108/24 brd 192.168.1.255 scope global dynamic noprefixroute enp3s0
valid_lft 604321sec preferred_lft 604321sec
inet6 fe80::ca0c:476f:b4a9:ae4d/64 scope link noprefixroute
valid_lft forever preferred_lft forever
##### iwconfig ##########################
enp3s0 no wireless extensions.
lo no wireless extensions.
##### route #############################
default via 192.168.1.1 dev enp3s0 proto dhcp metric 100
169.254.0.0/16 dev enp3s0 scope link metric 1000
192.168.1.0/24 dev enp3s0 proto kernel scope link src 192.168.1.108 metric 100
##### resolv.conf #######################
[777 root '/etc/resolv.conf' -> '../run/systemd/resolve/stub-resolv.conf']
nameserver 127.0.0.53
##### network managers ##################
Installed:
NetworkManager
Running:
root 822 1 0 14:32 ? 00:00:00 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: enp3s0
GENERAL.TYPE: ethernet
GENERAL.NM-TYPE: NMDeviceEthernet
GENERAL.VENDOR: Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
GENERAL.DRIVER: r8169
GENERAL.DRIVER-VERSION: 2.3LK-NAPI
GENERAL.FIRMWARE-VERSION: --
GENERAL.HWADDR: <MAC 'enp3s0' [IF1]>
GENERAL.MTU: 1500
GENERAL.STATE: 100 (connected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.4/0000:03:00.0/net/enp3s0
GENERAL.IP-IFACE: enp3s0
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: Wired connection 1
GENERAL.CON-UUID: 69731fb2-585a-3d28-a544-fafa54a3f532
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/2
GENERAL.METERED: no (guessed)
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: 100 Mb/s
CAPABILITIES.IS-SOFTWARE: no
CAPABILITIES.SRIOV: no
WIRED-PROPERTIES.CARRIER: on
IP4.ADDRESS[1]: 192.168.1.108/24
IP4.GATEWAY: 192.168.1.1
IP4.ROUTE[1]: dst = 0.0.0.0/0, nh = 192.168.1.1, mt = 100
IP4.ROUTE[2]: dst = 192.168.1.0/24, nh = 0.0.0.0, mt = 100
IP4.ROUTE[3]: dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000
IP4.DNS[1]: 1.1.1.1
IP4.DNS[2]: 1.0.0.1
IP4.WINS[1]: 192.168.1.1
DHCP4.OPTION[1]: requested_routers = 1
DHCP4.OPTION[2]: requested_domain_search = 1
DHCP4.OPTION[3]: requested_host_name = 1
DHCP4.OPTION[4]: requested_broadcast_address = 1
DHCP4.OPTION[5]: requested_time_offset = 1
DHCP4.OPTION[6]: requested_domain_name = 1
DHCP4.OPTION[7]: requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[8]: requested_wpad = 1
DHCP4.OPTION[9]: requested_netbios_scope = 1
DHCP4.OPTION[10]: next_server = 0.0.0.0
DHCP4.OPTION[11]: broadcast_address = 192.168.1.255
DHCP4.OPTION[12]: requested_interface_mtu = 1
DHCP4.OPTION[13]: dhcp_message_type = 5
DHCP4.OPTION[14]: requested_subnet_mask = 1
DHCP4.OPTION[15]: ip_address = 192.168.1.108
DHCP4.OPTION[16]: routers = 192.168.1.1
DHCP4.OPTION[17]: requested_domain_name_servers = 1
DHCP4.OPTION[18]: subnet_mask = 255.255.255.0
DHCP4.OPTION[19]: requested_static_routes = 1
DHCP4.OPTION[20]: requested_ntp_servers = 1
DHCP4.OPTION[21]: domain_name_servers = 1.1.1.1 1.0.0.1
DHCP4.OPTION[22]: netbios_name_servers = 192.168.1.1
DHCP4.OPTION[23]: requested_ms_classless_static_routes = 1
DHCP4.OPTION[24]: requested_netbios_name_servers = 1
DHCP4.OPTION[25]: dhcp_lease_time = 604800
DHCP4.OPTION[26]: network_number = 192.168.1.0
DHCP4.OPTION[27]: expiry = 1557204171
DHCP4.OPTION[28]: dhcp_server_identifier = 192.168.1.1
IP6.ADDRESS[1]: fe80::ca0c:476f:b4a9:ae4d/64
IP6.GATEWAY: --
IP6.ROUTE[1]: dst = ff00::/8, nh = ::, mt = 256, table=255
IP6.ROUTE[2]: dst = fe80::/64, nh = ::, mt = 256
IP6.ROUTE[3]: dst = fe80::/64, nh = ::, mt = 100
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{2}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 69731fb2-585a-3d28-a544-fafa54a3f532 | Wired connection 1
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
##### NetworkManager config #############
[[/etc/NetworkManager/conf.d/default-wifi-powersave-on.conf]]
[connection]
wifi.powersave = 3
[[/etc/NetworkManager/NetworkManager.conf]]
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=false
[device]
wifi.scan-rand-mac-address=no
[[/usr/lib/NetworkManager/conf.d/10-dns-resolved.conf]]
[main]
dns=systemd-resolved
[[/usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf]]
[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:wwan
[[/usr/lib/NetworkManager/conf.d/20-connectivity-ubuntu.conf]]
[connectivity]
uri=http://connectivity-check.ubuntu.com/
[[/usr/lib/NetworkManager/conf.d/no-mac-addr-change.conf]]
[device-mac-addr-change-wifi]
match-device=driver:rtl8723bs,driver:rtl8189es,driver:r8188eu,driver:8188eu,driver:eagle_sdio,driver:wl
wifi.scan-rand-mac-address=no
wifi.cloned-mac-address=preserve
ethernet.cloned-mac-address=preserve
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/Wi-Fi connection 1]] (600 root)
[connection] id=Wi-Fi connection 1 | type=wifi | permissions=
[wifi] mac-address-blacklist= | ssid=Home
[ipv4] method=auto
[ipv6] method=auto
##### Netplan config ####################
[/etc/netplan/1-network-manager-all.yaml]
network:
version: 2
renderer: NetworkManager
##### iw reg get ########################
Region: Australia/Brisbane (based on set time zone)
global
country 00: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
(5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
(5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
(5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
(57240 - 63720 @ 2160), (N/A, 0), (N/A)
##### iwlist channels ###################
enp3s0 no frequency information.
lo no frequency information.
##### iwlist scan #######################
enp3s0 Interface doesn't support scanning.
lo Interface doesn't support scanning.
##### module infos ######################
[mac80211]
filename: /lib/modules/4.15.0-20-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: 1CEA5CF286EDB289C1D0BF8
depends: cfg80211
retpoline: Y
intree: Y
name: mac80211
vermagic: 4.15.0-20-generic SMP mod_unload
signat: PKCS#7
signer:
sig_key:
sig_hashalgo: md4
parm: minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool)
parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int)
parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)
[cfg80211]
filename: /lib/modules/4.15.0-20-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: D5B0789D4C423C81CCFB437
depends:
retpoline: Y
intree: Y
name: cfg80211
vermagic: 4.15.0-20-generic SMP mod_unload
signat: PKCS#7
signer:
sig_key:
sig_hashalgo: md4
parm: bss_entries_limit:limit to number of scan BSS entries (per wiphy, default 1000) (int)
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
##### module parameters #################
[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
minstrel_vht_only: Y
probe_wait_ms: 500
[cfg80211]
bss_entries_limit: 1000
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
##### modprobe options ##################
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac
[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off
[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
##### rc.local ##########################
grep: /etc/rc.local: No such file or directory
##### pm-utils ##########################
##### udev rules ########################
##### dmesg #############################
########## wireless info END ############
Edit1：看起来问题是缺少无线驱动程序（Realtek RTL8822BE）。我还发现这个存储库其中可能有必要的文件，但我仍然不知道如何处理它们。
编辑 2：我尝试按照 stackoverflow 中找到的以下步骤进行操作。
sudo apt install build-essential git
git clone https://github.com/rtlwifi-linux/rtlwifi-next
cd rtlwifi-next
make
sudo make install
sudo modprobe rtl8822be
但我收到了这个错误：
CC [M] /home/MYUSER/Downloads/rtlwifi-next/base.o /home/MYUSER/Downloads/rtlwifi-next/base.c：在函数“_rtl_init_deferred_work”中：/home/MYUSER/Downloads/rtlwifi-next/ base.c:460:2：错误：函数“setup_timer”的隐式声明；您的意思是“sk_stop_timer”吗？ [-Werror=隐式函数声明]
setup_timer(&rtlpriv->works.watchdog_timer, ^~~~~~~~~~~
sk_stop_timer
编辑 3：在我发布答案后，我启用了安全启动，但我的 wifi 停止工作。因此，我的 WiFi 仅在安全启动被禁用时才工作。
答案1
作为替代答案，您可以使用 MOK 密钥对驱动程序进行签名
完整的写法是这里
这样您就可以保持安全启动启用状态！
编写从下载存储库到完成的所有基础内容将如下所示：
（请注意，我签署了更多模块，然后我可能需要。我不确定哪些模块管理什么，除了 rtl8822be 是我的驱动程序，所以我签署了所有模块，前面没有 rtl，以防万一。）
#Generate a new MOK key
sudo update-secureboot-policy --new-key
#Enroll key into firmware
sudo update-secureboot-policy --enroll-key
阅读注册密钥中的说明。 重新启动计算机并按照它们进行操作。
接下来的部分与之前相同：
sudo apt install build-essential git
git clone -b extended https://github.com/lwfinger/rtlwifi_new.git
cd rtlwifi_new
make
有趣的部分来了：
sudo kmodsign sha512 \
/var/lib/shim-signed/mok/MOK.priv \
/var/lib/shim-signed/mok/MOK.der \
rtl_pci.ko
sudo kmodsign sha512 \
/var/lib/shim-signed/mok/MOK.priv \
/var/lib/shim-signed/mok/MOK.der \
rtlwifi.ko
sudo kmodsign sha512 \
/var/lib/shim-signed/mok/MOK.priv \
/var/lib/shim-signed/mok/MOK.der \
rtl8822be/rtl8822be.ko
之后我们以同样的方式完成
sudo make install
sudo modprobe rtl8822be
然后瞧，wifi 就可以工作了。
答案2
全新安装 Linux Mint 后，由于缺少 Realtek RTL8822BE 驱动程序，我的 wifi 无法工作。
要安装，我必须按照以下步骤操作：
sudo apt install build-essential git
git clone -b extended https://github.com/lwfinger/rtlwifi_new.git
cd rtlwifi_new
make
sudo make install
sudo modprobe rtl8822be
请注意，我正在克隆扩展分支，因为我的内核版本是 4.15，正如@Freddy 指出的那样。
在sudo modprobe rtl8822be我收到以下错误后：
modprobe：错误：无法插入“rtl8822be”：所需的密钥不可用
然后我需要禁用安全启动，您可以通过多种方式实现这一点这个链接尖。但对我有用的是这个答案。您需要遵循此答案的每一步才能获得正确的结果。
最后我运行sudo mobprobe rtl882be并在控制台上得到了这个输出：
modprobe：错误：无法插入“rtl8822be”：执行格式错误
然后我意识到我的无线网络已经可以工作了。