我刚刚在联想 Yoga 13 上安装了 Ubuntu 16.04，但 wifi 无法使用。我尝试安装驱动程序 rtl8723au，但在运行时
sudo modprobe 8723au
我收到一个错误：
modprobe: ERROR: could not insert '8723au': Device or resource busy
以下命令的输出：
makosz@makoszlap:~$ uname -a
Linux makoszlap 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
makosz@makoszlap:~$ lspci -nnk
00:00.0 Host bridge [0600]: Intel Corporation 3rd Gen Core processor DRAM Controller [8086:0154] (rev 09)
Subsystem: Lenovo 3rd Gen Core processor DRAM Controller [17aa:3977]
Kernel driver in use: ivb_uncore
00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:3977]
Kernel driver in use: i915
Kernel modules: i915
00:04.0 Signal processing controller [1180]: Intel Corporation 3rd Gen Core Processor Thermal Subsystem [8086:0153] (rev 09)
Subsystem: Lenovo 3rd Gen Core Processor Thermal Subsystem [17aa:3977]
00:14.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller [8086:1e31] (rev 04)
Subsystem: Lenovo 7 Series/C210 Series Chipset Family USB xHCI Host Controller [17aa:3977]
Kernel driver in use: xhci_hcd
00:16.0 Communication controller [0780]: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 [8086:1e3a] (rev 04)
Subsystem: Lenovo 7 Series/C210 Series Chipset Family MEI Controller [17aa:3977]
Kernel driver in use: mei_me
Kernel modules: mei_me
00:1a.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 [8086:1e2d] (rev 04)
Subsystem: Lenovo 7 Series/C210 Series Chipset Family USB Enhanced Host Controller [17aa:3977]
Kernel driver in use: ehci-pci
00:1b.0 Audio device [0403]: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller [8086:1e20] (rev 04)
Subsystem: Lenovo 7 Series/C210 Series Chipset Family High Definition Audio Controller [17aa:3977]
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1d.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 [8086:1e26] (rev 04)
Subsystem: Lenovo 7 Series/C210 Series Chipset Family USB Enhanced Host Controller [17aa:3977]
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge [0601]: Intel Corporation QS77 Express Chipset LPC Controller [8086:1e56] (rev 04)
Subsystem: Lenovo QS77 Express Chipset LPC Controller [17aa:3977]
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich
00:1f.2 SATA controller [0106]: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] [8086:1e03] (rev 04)
Subsystem: Lenovo 7 Series Chipset Family 6-port SATA Controller [AHCI mode] [17aa:3977]
Kernel driver in use: ahci
Kernel modules: ahci
00:1f.3 SMBus [0c05]: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller [8086:1e22] (rev 04)
Subsystem: Lenovo 7 Series/C210 Series Chipset Family SMBus Controller [17aa:3977]
Kernel modules: i2c_i801
00:1f.6 Signal processing controller [1180]: Intel Corporation 7 Series/C210 Series Chipset Family Thermal Management Controller [8086:1e24] (rev 04)
Subsystem: Lenovo 7 Series/C210 Series Chipset Family Thermal Management Controller [17aa:3977]
makosz@makoszlap:~$ lsusb
Bus 002 Device 004: ID 04f2:b322 Chicony Electronics Co., Ltd
Bus 002 Device 003: ID 2047:0855 Texas Instruments Invensense Embedded MotionApp HID Sensor
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 005: ID 04f3:000a Elan Microelectronics Corp. Touchscreen
Bus 001 Device 004: ID 0bda:1724 Realtek Semiconductor Corp. RTL8723AU 802.11n WLAN Adapter
Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 007: ID 13b1:0020 Linksys WUSB54GC v1 802.11g Adapter [Ralink RT73]
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
makosz@makoszlap:~$ iwconfig
lo no wireless extensions.
wlx0018390e2898 IEEE 802.11bg ESSID:"SBG6700AC-EB684"
Mode:Managed Frequency:2.412 GHz Access Point: 1C:49:7B:91:08:3A
Bit Rate=54 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=62/70 Signal level=-48 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:176 Missed beacon:0
wlx24fd520d9ef3 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
makosz@makoszlap:~$ lsmod
Module Size Used by
ctr 16384 1
ccm 20480 1
rt73usb 32768 0
rt2x00usb 24576 1 rt73usb
rt2x00lib 57344 2 rt73usb,rt2x00usb
crc_itu_t 16384 1 rt73usb
rfcomm 69632 0
input_leds 16384 0
rtsx_usb_ms 20480 0
memstick 20480 1 rtsx_usb_ms
r8723au 516096 0
arc4 16384 4
bnep 20480 2
snd_hda_codec_hdmi 53248 1
snd_hda_codec_conexant 24576 1
snd_hda_codec_generic 77824 1 snd_hda_codec_conexant
snd_hda_intel 36864 3
snd_hda_codec 135168 4 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel
jitterentropy_rng 16384 0
snd_hda_core 73728 5 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
snd_hwdep 16384 1 snd_hda_codec
snd_pcm 106496 4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_core
nls_iso8859_1 16384 1
drbg 32768 1
snd_seq_midi 16384 0
ansi_cprng 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
intel_rapl 20480 0
x86_pkg_temp_thermal 16384 0
dm_crypt 28672 1
intel_powerclamp 16384 0
coretemp 16384 0
kvm 536576 0
irqbypass 16384 1 kvm
snd_rawmidi 32768 1 snd_seq_midi
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
rtl8xxxu 73728 0
aesni_intel 167936 2159
snd_seq 69632 2 snd_seq_midi_event,snd_seq_midi
aes_x86_64 20480 1 aesni_intel
uvcvideo 90112 0
mac80211 737280 3 rtl8xxxu,rt2x00lib,rt2x00usb
lrw 16384 1 aesni_intel
gf128mul 16384 1 lrw
glue_helper 16384 1 aesni_intel
ablk_helper 16384 1 aesni_intel
cryptd 20480 1080 aesni_intel,ablk_helper
videobuf2_vmalloc 16384 1 uvcvideo
videobuf2_memops 16384 1 videobuf2_vmalloc
btusb 45056 0
videobuf2_v4l2 28672 1 uvcvideo
btrtl 16384 1 btusb
btbcm 16384 1 btusb
videobuf2_core 36864 2 uvcvideo,videobuf2_v4l2
joydev 20480 0
btintel 16384 1 btusb
v4l2_common 16384 1 videobuf2_v4l2
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
hid_sensor_accel_3d 16384 0
cfg80211 565248 3 mac80211,rt2x00lib,r8723au
hid_sensor_incl_3d 16384 0
hid_sensor_magn_3d 16384 0
hid_sensor_gyro_3d 16384 0
serio_raw 16384 0
bluetooth 520192 29 bnep,btbcm,btrtl,btusb,rfcomm,btintel
hid_sensor_rotation 16384 0
hid_sensor_trigger 16384 10 hid_sensor_gyro_3d,hid_sensor_incl_3d,hid_sensor_accel_3d,hid_sensor_rotation,hid_sensor_magn_3d
industrialio_triggered_buffer 16384 5 hid_sensor_gyro_3d,hid_sensor_incl_3d,hid_sensor_accel_3d,hid_sensor_rotation,hid_sensor_magn_3d
hid_sensor_iio_common 16384 6 hid_sensor_trigger,hid_sensor_gyro_3d,hid_sensor_incl_3d,hid_sensor_accel_3d,hid_sensor_rotation,hid_sensor_magn_3d
videodev 176128 4 uvcvideo,v4l2_common,videobuf2_core,videobuf2_v4l2
hid_multitouch 20480 0
snd_timer 32768 2 snd_pcm,snd_seq
media 24576 2 uvcvideo,videodev
snd 81920 17 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_pcm,snd_seq, snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
lpc_ich 24576 0
mei_me 36864 0
soundcore 16384 1 snd
mei 98304 1 mei_me
acpi_als 16384 0
ideapad_laptop 24576 0
kfifo_buf 16384 2 industrialio_triggered_buffer,acpi_als
sparse_keymap 16384 1 ideapad_laptop
industrialio 57344 9 hid_sensor_trigger,hid_sensor_gyro_3d,industrialio_triggered_buffer,hid_sensor_incl_3d,hid_sensor_accel_3d,acpi_als,hid_sensor_rotation,kfifo_buf,hid_sensor_magn_3d
int3400_thermal 16384 0
acpi_thermal_rel 16384 1 int3400_thermal
mac_hid 16384 0
parport_pc 32768 0
ppdev 20480 0
lp 20480 0
parport 49152 3 lp,ppdev,parport_pc
autofs4 40960 2
hid_sensor_custom 20480 0
hid_sensor_hub 20480 8 hid_sensor_trigger,hid_sensor_gyro_3d,hid_sensor_incl_3d,hid_sensor_accel_3d,hid_sensor_rotation,hid_sensor_custom,hid_sensor_magn_3d,hid_sensor_iio_common
rtsx_usb_sdmmc 28672 0
rtsx_usb 24576 2 rtsx_usb_sdmmc,rtsx_usb_ms
hid_logitech_hidpp 20480 0
hid_logitech_dj 20480 0
usbhid 49152 0
hid 118784 6 hid_multitouch,hid_sensor_hub,usbhid,hid_logitech_dj,hid_logitech_hidpp
i915 1208320 3
i2c_algo_bit 16384 1 i915
drm_kms_helper 147456 1 i915
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
fb_sys_fops 16384 1 drm_kms_helper
psmouse 126976 0
drm 360448 5 i915,drm_kms_helper
ahci 36864 3
libahci 32768 1 ahci
wmi 20480 1 ideapad_laptop
video 40960 2 i915,ideapad_laptop
fjes 28672 0
请注意，我目前正在使用外部 USB 无线网卡连接到互联网，但拔下电源时运行了 sudo modprobe 8723au。
答案1
按照指示这里。我不知道是什么起了作用，因为当我去睡觉时它仍然不起作用，但醒来后不知何故现在起作用了。