我尝试了在互联网上找到的所有解决方案，但都不起作用。我使用 5.0.0-37-generic 内核，并从我的 HP Notebook 15-db1103nm 笔记本电脑运行 Ubuntu 以下是我的无线信息：
########## wireless info START ##########
Report from: 06 Dec 2019 22:30 CET +0100
Booted last: 06 Dec 2019 00:00 CET +0100
Script from: 22 Oct 2018 03:34 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 18.04.3 LTS
Release: 18.04
Codename: bionic
##### kernel ############################
Linux 5.0.0-37-generic #40~18.04.1-Ubuntu SMP Thu Nov 14 12:06:39 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=1
##### desktop ###########################
Ubuntu
##### lspci #############################
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)
Subsystem: Hewlett-Packard Company RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [103c:85ea]
Kernel driver in use: r8169
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821]
Subsystem: Hewlett-Packard Company RTL8821CE 802.11ac PCIe Wireless Network Adapter [103c:831a]
04:00.0 Non-Volatile memory controller [0108]: Toshiba America Info Systems Device [1179:0113] (rev 01)
##### lsusb #############################
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 0bda:b00a Realtek Semiconductor Corp.
Bus 003 Device 003: ID 0408:5365 Quanta Computer, Inc.
Bus 003 Device 002: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 04f3:0235 Elan Microelectronics Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
##### secure boot #######################
'mokutil' is not installed (package "mokutil").
##### lsmod #############################
cfg80211 679936 0
compat 16384 1 cfg80211
hp_wmi 16384 0
sparse_keymap 16384 1 hp_wmi
wmi_bmof 16384 0
wmi 28672 2 hp_wmi,wmi_bmof
##### 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: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether <MAC 'eno1' [IF1]> brd <MAC address>
inet 192.168.0.21/24 brd 192.168.0.255 scope global dynamic noprefixroute eno1
valid_lft 3053sec preferred_lft 3053sec
inet6 fe80::58ef:6375:63c1:8351/64 scope link noprefixroute
valid_lft forever preferred_lft forever
##### iwconfig ##########################
lo no wireless extensions.
eno1 no wireless extensions.
##### route #############################
default via 192.168.0.1 dev eno1 proto dhcp metric 100
169.254.0.0/16 dev eno1 scope link metric 1000
192.168.0.0/24 dev eno1 proto kernel scope link src 192.168.0.21 metric 100
##### resolv.conf #######################
[777 root '/etc/resolv.conf' -> '../run/systemd/resolve/stub-resolv.conf']
nameserver 127.0.0.53
options edns0
##### network managers ##################
Installed:
NetworkManager
Running:
root 783 1 0 22:11 ? 00:00:00 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: eno1
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: --
GENERAL.FIRMWARE-VERSION: --
GENERAL.HWADDR: <MAC 'eno1' [IF1]>
GENERAL.MTU: 1500
GENERAL.STATE: 100 (connected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:01.2/0000:02:00.0/net/eno1
GENERAL.IP-IFACE: eno1
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: c83eb0c8-2e39-3bc8-9301-b6ec6bce12c4
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/4
GENERAL.METERED: no (guessed)
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: 1000 Mb/s
CAPABILITIES.IS-SOFTWARE: no
CAPABILITIES.SRIOV: no
WIRED-PROPERTIES.CARRIER: on
IP4.ADDRESS[1]: 192.168.0.21/24
IP4.GATEWAY: 192.168.0.1
IP4.ROUTE[1]: dst = 0.0.0.0/0, nh = 192.168.0.1, mt = 100
IP4.ROUTE[2]: dst = 192.168.0.0/24, 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]: 89.216.1.40
IP4.DNS[2]: 89.216.1.50
DHCP4.OPTION[1]: requested_subnet_mask = 1
DHCP4.OPTION[2]: requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[3]: subnet_mask = 255.255.255.0
DHCP4.OPTION[4]: domain_name_servers = 89.216.1.40 89.216.1.50
DHCP4.OPTION[5]: ip_address = 192.168.0.21
DHCP4.OPTION[6]: requested_static_routes = 1
DHCP4.OPTION[7]: dhcp_server_identifier = 192.168.0.1
DHCP4.OPTION[8]: default_ip_ttl = 64
DHCP4.OPTION[9]: requested_time_offset = 1
DHCP4.OPTION[10]: time_offset = 0
DHCP4.OPTION[11]: broadcast_address = 192.168.0.255
DHCP4.OPTION[12]: requested_interface_mtu = 1
DHCP4.OPTION[13]: requested_domain_name_servers = 1
DHCP4.OPTION[14]: dhcp_message_type = 5
DHCP4.OPTION[15]: dhcp_rebinding_time = 3150
DHCP4.OPTION[16]: requested_broadcast_address = 1
DHCP4.OPTION[17]: routers = 192.168.0.1
DHCP4.OPTION[18]: dhcp_renewal_time = 1800
DHCP4.OPTION[19]: requested_domain_name = 1
DHCP4.OPTION[20]: requested_routers = 1
DHCP4.OPTION[21]: expiry = 1575670888
DHCP4.OPTION[22]: requested_wpad = 1
DHCP4.OPTION[23]: requested_netbios_scope = 1
DHCP4.OPTION[24]: requested_ms_classless_static_routes = 1
DHCP4.OPTION[25]: requested_netbios_name_servers = 1
DHCP4.OPTION[26]: network_number = 192.168.0.0
DHCP4.OPTION[27]: requested_domain_search = 1
DHCP4.OPTION[28]: next_server = 192.168.0.1
DHCP4.OPTION[29]: requested_ntp_servers = 1
DHCP4.OPTION[30]: dhcp_lease_time = 3600
DHCP4.OPTION[31]: requested_host_name = 1
IP6.ADDRESS[1]: fe80::58ef:6375:63c1:8351/64
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/{1}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: c83eb0c8-2e39-3bc8-9301-b6ec6bce12c4 | 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 ###########
##### Netplan config ####################
[/etc/netplan/01-network-manager-all.yaml]
network:
version: 2
renderer: NetworkManager
##### iw reg get ########################
Region: Europe/Belgrade (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 ###################
lo no frequency information.
eno1 no frequency information.
##### iwlist scan #######################
lo Interface doesn't support scanning.
eno1 Interface doesn't support scanning.
##### module infos ######################
[cfg80211]
filename: /lib/modules/5.0.0-37-generic/updates/net/wireless/cfg80211.ko
version: iwlwifi-stack-public:master:8042:654c426c
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: BCF157A5337A326CC2937B9
depends: compat
retpoline: Y
name: cfg80211
vermagic: 5.0.0-37-generic SMP mod_unload
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 #################
[cfg80211]
bss_entries_limit: 1000
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
##### modprobe options ##################
[/etc/modprobe.d/amd64-microcode-blacklist.conf]
blacklist microcode
[/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 i2c_i801
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/intel-microcode-blacklist.conf]
blacklist microcode
[/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 #############################
[ 3.463133] r8169 0000:02:00.0 eno1: Link is Down
[ 7.742859] r8169 0000:02:00.0 eno1: Link is Up - 1Gbps/Full - flow control rx/tx
[ 7.742879] IPv6: ADDRCONF(NETDEV_CHANGE): eno1: link becomes ready
[ 517.970390] r8169 0000:02:00.0 eno1: Link is Down
[ 550.225866] r8169 0000:02:00.0 eno1: Link is Up - 100Mbps/Full - flow control rx/tx
[ 610.574063] r8169 0000:02:00.0 eno1: Link is Down
[ 619.678173] r8169 0000:02:00.0 eno1: Link is Up - 1Gbps/Full - flow control rx/tx
[ 1058.568937] iwlwifi-stack-public:master:8enter code here042:654c426c
########## wireless info END ############
答案1
这是我为 RTL8821 使用的。它运行完美。
确保您已拥有git并dkms安装了（sudo apt install dkms git）。
mkdir -p ~/build- 创建一个目录来构建。
cd ~/build- 进入该目录
git clone https://github.com/tomaspinho/rtl8821ce.git- 克隆我们需要的 repo
cd rtl8821CU- cd 进入我们刚刚克隆的新目录
sudo ./dkms-install.sh $USER- 现在构建包。
这可能需要几分钟，具体取决于您的硬件。完成后，您的 wifi 应该可以正常工作。如果没有，请发表评论，我会继续提供帮助。谢谢