在我的 Dell XPS 13 上，WiFi 经常断线。有时几分钟后。有时是下班后。它死后，我必须停用网络。并重新启用它。例如在 Linux Mint 菜单中。有时这会有所帮助，有时甚至重新启动也无济于事。在命令行上，它有助于卸载和安装 wl 模块：
modprobe -r wl
modprobe wl
“lspci -vvnn | grep -A 9 Network”给了我这个：
02:00.0 Network controller [0280]: Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter [14e4:43b1] (rev 03)
Subsystem: Dell BCM4352 802.11ac Wireless Network Adapter [1028:0019]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 19
Region 0: Memory at f7200000 (64-bit, non-prefetchable) [size=32K]
Region 2: Memory at f7000000 (64-bit, non-prefetchable) [size=2M]
Capabilities: [48] Power Management version 3
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=2 PME-
在“dmesg -T”的输出中，我经常看到这样的内容：
[Sat Sep 10 11:30:35 2016] cfg80211: World regulatory domain updated:
[Sat Sep 10 11:30:35 2016] cfg80211: DFS Master region: unset
[Sat Sep 10 11:30:35 2016] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[Sat Sep 10 11:30:35 2016] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[Sat Sep 10 11:30:35 2016] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[Sat Sep 10 11:30:35 2016] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[Sat Sep 10 11:30:35 2016] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[Sat Sep 10 11:30:35 2016] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[Sat Sep 10 11:30:35 2016] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[Sat Sep 10 11:30:35 2016] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[Sat Sep 10 11:30:35 2016] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
“lshw -C 网络”给了我这个：
*-network
description: Wireless interface
product: BCM4352 802.11ac Wireless Network Adapter
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 03
serial: ...
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) ip=... latency=0 multicast=yes wireless=IEEE 802.11abg
resources: irq:19 memory:f7200000-f7207fff memory:f7000000-f71fffff
这是 lsmod 的输出：
Module Size Used by
wl 6447104 0
cfg80211 565248 1 wl
rfcomm 69632 2
bnep 20480 2
binfmt_misc 20480 1
nls_iso8859_1 16384 1
hid_multitouch 20480 0
btusb 45056 0
btrtl 16384 1 btusb
dell_wmi 16384 0
btbcm 16384 1 btusb
uvcvideo 90112 0
btintel 16384 1 btusb
bluetooth 520192 29 bnep,btbcm,btrtl,btusb,rfcomm,btintel
dell_laptop 20480 0
videobuf2_vmalloc 16384 1 uvcvideo
videobuf2_memops 16384 1 videobuf2_vmalloc
dcdbas 16384 1 dell_laptop
videobuf2_v4l2 28672 1 uvcvideo
videobuf2_core 36864 2 uvcvideo,videobuf2_v4l2
v4l2_common 16384 1 videobuf2_v4l2
videodev 176128 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_intel 172032 0
snd_soc_ssm4567 16384 0
kvm 540672 1 kvm_intel
snd_soc_rt286 36864 0
snd_soc_rl6347a 16384 1 snd_soc_rt286
snd_soc_core 212992 2 snd_soc_ssm4567,snd_soc_rt286
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_compress 20480 1 snd_soc_core
snd_rawmidi 32768 1 snd_seq_midi
ac97_bus 16384 1 snd_soc_core
irqbypass 16384 1 kvm
snd_pcm_dmaengine 16384 1 snd_soc_core
dell_led 16384 1
snd_hda_codec_realtek 86016 1
snd_hda_codec_hdmi 53248 1
snd_hda_codec_generic 77824 1 snd_hda_codec_realtek
snd_seq 69632 2 snd_seq_midi_event,snd_seq_midi
joydev 20480 0
input_leds 16384 0
serio_raw 16384 0
snd_hda_intel 36864 5
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_hda_codec 135168 4 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel
snd_hda_core 73728 5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
intel_pch_thermal 16384 0
snd_hwdep 16384 1 snd_hda_codec
mei_me 36864 0
rtsx_pci_ms 20480 0
snd_pcm 106496 7 snd_soc_core,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_soc_rt286,snd_pcm_dmaengine,snd_hda_core
memstick 20480 1 rtsx_pci_ms
lpc_ich 24576 0
mei 98304 1 mei_me
shpchp 36864 0
snd_timer 32768 2 snd_pcm,snd_seq
elan_i2c 36864 0
snd 81920 23 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
soundcore 16384 1 snd
int3403_thermal 16384 0
intel_vbtn 16384 0
soc_button_array 16384 0
dw_dmac 16384 0
dw_dmac_core 24576 1 dw_dmac
snd_soc_sst_acpi 16384 0
mac_hid 16384 0
processor_thermal_device 16384 0
8250_dw 16384 0
spi_pxa2xx_platform 24576 0
i2c_designware_platform 16384 0
tpm_crb 16384 0
int3402_thermal 16384 0
i2c_designware_core 20480 1 i2c_designware_platform
int340x_thermal_zone 16384 3 int3402_thermal,processor_thermal_device,int3403_thermal
int3400_thermal 16384 0
acpi_thermal_rel 16384 1 int3400_thermal
intel_soc_dts_iosf 16384 1 processor_thermal_device
intel_hid 16384 0
acpi_pad 20480 0
sparse_keymap 16384 3 dell_wmi,intel_hid,intel_vbtn
acpi_als 16384 0
kfifo_buf 16384 1 acpi_als
industrialio 57344 2 acpi_als,kfifo_buf
parport_pc 32768 0
ppdev 20480 0
lp 20480 0
parport 49152 3 lp,ppdev,parport_pc
autofs4 40960 2
btrfs 987136 0
xor 24576 1 btrfs
raid6_pq 102400 1 btrfs
jitterentropy_rng 16384 0
drbg 32768 1
ansi_cprng 16384 0
algif_skcipher 20480 0
af_alg 16384 1 algif_skcipher
dm_crypt 28672 2
dm_mirror 24576 0
dm_region_hash 24576 1 dm_mirror
dm_log 20480 2 dm_region_hash,dm_mirror
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
rtsx_pci_sdmmc 24576 0
i915 1208320 4
aesni_intel 167936 5
aes_x86_64 20480 1 aesni_intel
lrw 16384 1 aesni_intel
i2c_algo_bit 16384 1 i915
gf128mul 16384 1 lrw
glue_helper 16384 1 aesni_intel
drm_kms_helper 147456 1 i915
ablk_helper 16384 1 aesni_intel
ahci 36864 4
syscopyarea 16384 1 drm_kms_helper
cryptd 20480 4 aesni_intel,ablk_helper
sysfillrect 16384 1 drm_kms_helper
psmouse 126976 0
sysimgblt 16384 1 drm_kms_helper
fb_sys_fops 16384 1 drm_kms_helper
drm 364544 5 i915,drm_kms_helper
libahci 32768 1 ahci
rtsx_pci 53248 2 rtsx_pci_ms,rtsx_pci_sdmmc
wmi 20480 2 dell_led,dell_wmi
video 40960 3 i915,dell_wmi,dell_laptop
i2c_hid 20480 0
sdhci_acpi 16384 0
hid 118784 2 i2c_hid,hid_multitouch
sdhci 45056 1 sdhci_acpi
fjes 28672 0
有什么想法如何找到原因吗？
答案1
禁用电源管理：
iwconfig wlan0 power off
要使其永久，请创建一个power_off文件
nano /etc/pm/config.d/power_off
包含以下内容：
#!/bin/sh
/sbin/iwconfig wlan0 power off
使其可执行chmod +x /etc/pm/config.d/power_off
然后卸载冲突的模块：
modprobe -r b44 b43 b43legacy ssb brcmsmac bcma
或者将他们列入黑名单etc/modprobe.d/