我的背景：长期使用 16.04，但仍然是个菜鸟（只是欣赏相对简单的操作系统）。新笔记本电脑，安装了 18.04，完全取代了 Windows 10。花了几个小时试图解决这个问题，但没有结果。
我的问题似乎与这个帖子，但是他们的解决方案对我来说不起作用。
模仿他们提供的信息：
sudo lshw -C network返回：
*-network UNCLAIMED
（以及以太网信息）
description: Network controller product: Realtek Semiconductor Co., Ltd. vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:07:00.0 version: 00 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress cap_list configuration: latency=0 resources: ioport:4000(size=256) memory:a4300000-a430ffff
lspci -nnk | grep 0280 -A2返回：
07:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:b822] Subsystem: Lenovo Device [17aa:b023] Kernel modules: r8822be, wl, rtl8822be
sudo modprobe wl && dmesg | grep wl返回：
[ 0.000000] ACPI Error: [TPLD] Namespace lookup failure, AE_ALREADY_EXISTS (20170831/dswload-378) [ 0.000000] ACPI Error: [TPD0] Namespace lookup failure, AE_NOT_FOUND (20170831/dswload-210) [ 0.000000] ACPI Error: [_ON_] Namespace lookup failure, AE_ALREADY_EXISTS (20170831/dswload-378) [ 19.701890] Loading modules backported from iwlwifi [ 19.701891] iwlwifi-stack-public:master:7299:2c6dbf84 [ 21.147567] WARNING: CPU: 3 PID: 550 at /home/jeremy/backport-iwlwifi/net/wireless/reg.c:2294 wiphy_apply_custom_regulatory+0xb6/0xe0 [cfg80211] [ 21.147770] WARNING: CPU: 3 PID: 550 at /home/jeremy/backport-iwlwifi/net/wireless/reg.c:2308 wiphy_apply_custom_regulatory+0xc3/0xe0 [cfg80211] [ 21.148377] WARNING: CPU: 3 PID: 550 at /home/jeremy/backport-iwlwifi/net/wireless/core.c:855 wiphy_register+0x8bf/0x8f0 [cfg80211] [ 21.682507] Modules linked in: wl(POE+) joydev snd_hda_core snd_hwdep snd_pcm btusb snd_seq_midi intel_rapl x86_pkg_temp_thermal r8822be(CE) mac80211(OE) intel_powerclamp snd_seq_midi_event btrtl coretemp hid_multitouch snd_rawmidi btbcm btintel bluetooth 8250_dw cfg80211(OE) snd_seq wmi_bmof kvm ecdh_generic irqbypass compat(OE) intel_cstate intel_wmi_thunderbolt intel_rapl_perf snd_seq_device snd_timer idma64 virt_dma snd mei_me shpchp nvidia_uvm(POE) intel_lpss_pci mei input_leds ucsi_acpi typec_ucsi serio_raw mac_hid intel_lpss soundcore typec processor_thermal_device int3403_thermal int3400_thermal intel_soc_dts_iosf intel_pch_thermal int340x_thermal_zone acpi_pad acpi_thermal_rel wmi sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi parport_pc [ 21.682575] wl_module_init+0x89/0x8b [wl] [ 21.914773] WARNING: CPU: 10 PID: 550 at /home/jeremy/backport-iwlwifi/net/mac80211/rate.c:125 ieee80211_rate_control_register+0x5e/0xf0 [mac80211] [ 21.914773] Modules linked in: rtlwifi(OE+) snd_hda_codec wl(POE) joydev snd_hda_core snd_hwdep snd_pcm btusb snd_seq_midi intel_rapl x86_pkg_temp_thermal r8822be(CE) mac80211(OE) intel_powerclamp snd_seq_midi_event btrtl coretemp hid_multitouch snd_rawmidi btbcm btintel bluetooth 8250_dw cfg80211(OE) snd_seq wmi_bmof kvm ecdh_generic irqbypass compat(OE) intel_cstate intel_wmi_thunderbolt intel_rapl_perf snd_seq_device snd_timer idma64 virt_dma snd mei_me shpchp nvidia_uvm(POE) intel_lpss_pci mei input_leds ucsi_acpi typec_ucsi serio_raw mac_hid intel_lpss soundcore typec processor_thermal_device int3403_thermal int3400_thermal intel_soc_dts_iosf intel_pch_thermal int340x_thermal_zone acpi_pad acpi_thermal_rel wmi sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
附加内容
Ubuntu 告诉我“未找到 Wi-Fi 适配器”。在“软件和更新”->“附加驱动程序”中没有此驱动程序的更新（即使选中了“Ubuntu 软件”下所有其他“可从互联网下载”选项）。
我尝试了无数种与使用 GitHub repos 下载驱动程序有关的解决方案（我已经失去了踪迹）。
安全启动已禁用。
也许很重要：我从某处读到，我可能需要物理打开 Wi-Fi 适配器，我担心这可能是问题所在，因为我在安装 Ubuntu 18.04 时关闭了 Wi-Fi（使用以太网进行更快的下载）并且如果这是问题所在，没有明显的键盘快捷键可以将其重新打开。