我一直尝试互联网上找到的所有提示和建议，以使我的 HP 笔记本电脑型号 15-daxxx 中的 Ubuntu 18.04.02 桌面能够看到 WIFI 连接，但没有成功。
我已经完成此处列出的所有步骤未找到WiFi适配器Ubuntu18.04HP笔记本电脑 但 Ubuntu 18.04.02 桌面仍然显示“未找到 WiFi 适配器”
我也在 HP 网站上放了以下内容：HP 驱动程序笔记本电脑我的笔记本电脑的 ID 号被正确识别，我唯一可以选择的操作系统是 Windows。单击链接“我看不到我的操作系统”，我在此 HP 网页上找到：HP产品-我的操作系统，我选择了Linux ->Linux内核档案，我下载了最新的稳定内核，然后按照说明安装了 WiFi 内核 iwd-0.9。但是重启后再次出现：“未找到 Wifi 适配器”。
我该如何解决这个奇怪的问题？期待您的帮助。Marco
更新：1）
lspci -knn | grep Net -A3; rfkill list
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]
Kernel modules: wl
04:00.0 Non-Volatile memory controller [0108]: Toshiba America Info
Systems Device [1179:0113] (rev 01)
Subsystem: Toshiba America Info Systems Device [1179:0001]
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
2）按照此处的说明进行操作：网络-WiFiNotWorkingInLenovoThinkPadE570（RealTekRTL8821CE）
我通过以下方式更新了 Makefile：
#export TopDIR ?= $(srctree)/drivers/net/wireless/rtl8821ce
export TopDIR ?= $ ~/Downloads/rtl8821ce
保存更改，然后运行 make：
CC [M] /home/riccardo/Downloads/rtl8821ce/os_dep/osdep_service.o
CC [M] /home/riccardo/Downloads/rtl8821ce/os_dep/linux/os_intfs.o
/home/riccardo/Downloads/rtl8821ce/os_dep/linux/os_intfs.c:1325:22: error:
initialization from incompatible pointer type [-Werror=incompatible-
pointer-types]
.ndo_select_queue = rtw_select_queue,
^~~~~~~~~~~~~~~~
/home/riccardo/Downloads/rtl8821ce/os_dep/linux/os_intfs.c:1325:22: note:
(near initialization for ‘rtw_netdev_ops.ndo_select_queue’)
cc1: some warnings being treated as errors
scripts/Makefile.build:325: recipe for target '/home/riccardo/Downloads
/rtl8821ce/os_dep/linux/os_intfs.o' failed
make[2]: *** [/home/riccardo/Downloads/rtl8821ce/os_dep/linux/os_intfs.o]
Error 1
Makefile:1534: recipe for target '_module_/home/riccardo/Downloads
/rtl8821ce' failed
make[1]: *** [_module_/home/riccardo/Downloads/rtl8821ce] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.18.0-15-generic'
Makefile:1903: recipe for target 'modules' failed
make: *** [modules] Error 2
我重新安装了 Ubuntu 18.04.02 Desktop，删除了硬盘上所有以前的内容，以便获得更干净的环境。但是再次修改 Makefile 文件后：
#export TopDIR ?= $(srctree)/drivers/net/wireless/rtl8821ce
export TopDIR ?= $ ~/Downloads/rtl8821ce
相同的错误信息：
~/Downloads/rtl8821ce$ make
make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/4.18.0-15-generic/build
M=/home/riccardo/Downloads/rtl8821ce modules
make[1]: Entering directory '/usr/src/linux-headers-4.18.0-15-generic'
CC [M] /home/riccardo/Downloads/rtl8821ce/os_dep/linux/os_intfs.o
/home/riccardo/Downloads/rtl8821ce/os_dep/linux/os_intfs.c:1325:22: error:
initialization from incompatible pointer type [-Werror=incompatible-
pointer-types]
.ndo_select_queue = rtw_select_queue,
^~~~~~~~~~~~~~~~
/home/riccardo/Downloads/rtl8821ce/os_dep/linux/os_intfs.c:1325:22: note:
(near initialization for ‘rtw_netdev_ops.ndo_select_queue’)
cc1: some warnings being treated as errors
scripts/Makefile.build:325: recipe for target '/home/riccardo/Downloads
/rtl8821ce/os_dep/linux/os_intfs.o' failed
make[2]: *** [/home/riccardo/Downloads/rtl8821ce/os_dep/linux/os_intfs.o]
Error 1
Makefile:1534: recipe for target '_module_/home/riccardo/Downloads
/rtl8821ce' failed
make[1]: *** [_module_/home/riccardo/Downloads/rtl8821ce] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.18.0-15-generic'
Makefile:1903: recipe for target 'modules' failed
make: *** [modules] Error 2
已解决：感谢此处的指示：联想 Thinkpad E480 - 在 Ubuntu 18.04 中未找到 Wifi 适配器，并感谢插入此有用链接的人。
答案1
检查以确保 wifi 适配器没有被键盘热键或设备上的物理按钮/开关禁用。
如果处于打开状态，则应该以白色和琥珀色之间闪烁来显示活动。
键盘上启用 wifi 适配器的键位于最上面一行，如下所示：((I))