即使经过大量故障排除后，WiFi 仍然无法连接。
- WiFi 连接需要很长时间。
- 即使成功连接（这种情况很少见），互联网连接最多也只能工作 10 分钟，之后就会停止发送和接收数据。
输出至lspci -knn | grep Net -A3：
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
Subsystem: Hewlett-Packard Company Device [103c:81c1]
Kernel driver in use: rtl8723be
按照链接中的步骤操作瑞昱科技直到点。事情是这样的：
输入
sudo add-apt-repository ppa:hanipouspilot/rtlwifi
sudo apt-get update
sudo apt-get install rtlwifi-new-dkms
此后，就根本不存在任何无线连接的选项。
输出为了dkms status
bcmwl, 6.30.223.248+bdcom, 4.4.0-92-generic, x86_64: installed
rtlwifi-new, 0.10~trusty, 4.4.0-92-generic, x86_64: installed
输出为了lsmod
Module Size Used by
bnep 20480 2
rfcomm 69632 8
binfmt_misc 20480 1
mac80211 733184 0
amdkfd 131072 1
uvcvideo 90112 0
videobuf2_vmalloc 16384 1 uvcvideo
amd_iommu_v2 20480 1 amdkfd
videobuf2_memops 16384 1 videobuf2_vmalloc
videobuf2_v4l2 28672 1 uvcvideo
videobuf2_core 36864 2 uvcvideo,videobuf2_v4l2
v4l2_common 16384 1 videobuf2_v4l2
radeon 1503232 1
videodev 180224 4 uvcvideo,v4l2_common,videobuf2_core,videobuf2_v4l2
media 24576 2 uvcvideo,videodev
intel_rapl 20480 0
x86_pkg_temp_thermal 16384 0
intel_powerclamp 16384 0
coretemp 16384 0
kvm 536576 0
snd_soc_skl 49152 0
snd_soc_skl_ipc 32768 1 snd_soc_skl
snd_hda_ext_core 28672 1 snd_soc_skl
snd_soc_sst_ipc 16384 1 snd_soc_skl_ipc
snd_soc_sst_dsp 53248 1 snd_soc_skl_ipc
snd_hda_codec_hdmi 53248 1
snd_soc_core 212992 1 snd_soc_skl
snd_hda_codec_realtek 86016 1
snd_hda_codec_generic 73728 1 snd_hda_codec_realtek
snd_compress 20480 1 snd_soc_core
ac97_bus 16384 1 snd_soc_core
snd_pcm_dmaengine 16384 1 snd_soc_core
dw_dmac_core 24576 1 snd_soc_sst_dsp
snd_hda_intel 40960 3
snd_hda_codec 135168 4 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel
ttm 94208 1 radeon
cfg80211 561152 1 mac80211
snd_hda_core 73728 7 snd_hda_codec_realtek,snd_hda_ext_core,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_soc_skl
snd_hwdep 16384 1 snd_hda_codec
snd_pcm 106496 8 snd_hda_ext_core,snd_soc_core,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_soc_skl,snd_pcm_dmaengine,snd_hda_core
i915_bpo 1306624 4
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 32768 1 snd_seq_midi
snd_seq 69632 2 snd_seq_midi_event,snd_seq_midi
irqbypass 16384 1 kvm
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
hci_uart 77824 0
ghash_clmulni_intel 16384 0
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 32768 2 snd_pcm,snd_seq
hp_wmi 16384 0
snd 81920 19 snd_hda_codec_realtek,snd_soc_core,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_compress
sparse_keymap 16384 1 hp_wmi
aesni_intel 167936 0
aes_x86_64 20480 1 aesni_intel
lrw 16384 1 aesni_intel
gf128mul 16384 1 lrw
glue_helper 16384 1 aesni_intel
ablk_helper 16384 1 aesni_intel
cryptd 20480 3 ghash_clmulni_intel,aesni_intel,ablk_helper
btqca 16384 1 hci_uart
intel_ips 20480 1 i915_bpo
drm_kms_helper 151552 2 i915_bpo,radeon
btusb 45056 0
btrtl 16384 1 btusb
btbcm 16384 2 btusb,hci_uart
btintel 16384 2 btusb,hci_uart
bluetooth 516096 27 bnep,btbcm,btqca,btrtl,btusb,hci_uart,rfcomm,btintel
soundcore 16384 1 snd
joydev 20480 0
shpchp 36864 0
input_leds 16384 0
serio_raw 16384 0
tpm_crb 16384 0
wmi 20480 1 hp_wmi
drm 360448 8 ttm,i915_bpo,drm_kms_helper,radeon
i2c_hid 20480 0
hid 118784 1 i2c_hid
mei_me 36864 0
video 40960 1 i915_bpo
mei 98304 1 mei_me
pinctrl_sunrisepoint 28672 0
pinctrl_intel 20480 1 pinctrl_sunrisepoint
intel_lpss_acpi 16384 0
intel_lpss 16384 1 intel_lpss_acpi
i2c_algo_bit 16384 2 i915_bpo,radeon
fb_sys_fops 16384 1 drm_kms_helper
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
parport_pc 36864 0
processor_thermal_device 16384 0
sysimgblt 16384 1 drm_kms_helper
int340x_thermal_zone 16384 1 processor_thermal_device
intel_soc_dts_iosf 16384 1 processor_thermal_device
ppdev 20480 0
mac_hid 16384 0
int3400_thermal 16384 0
acpi_thermal_rel 16384 1 int3400_thermal
hp_wireless 16384 0
acpi_pad 24576 0
lp 20480 0
parport 49152 3 lp,ppdev,parport_pc
psmouse 131072 0
r8169 81920 0
ahci 36864 3
mii 16384 1 r8169
libahci 32768 1 ahci
fjes 28672 0
更新：
wl已删除。
rfkill列表输出：
0: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no