Ubuntu: wl module is loaded but not working



Question:

I have Broadcom bcm43142 chipset and I installed the correct wl module and the wifi seemed to be working fine but when I rebooted my laptop, wifi was gone.

The output of the lsmod command shows that wl module is loaded but sudo modprobe wl doesn't do anything.

I just don't know how to get it to work again. Once in a few times when I boot up, wifi interface shows up but it only lasts till that session.

Please help me, I've tried everything I could and searched almost all the threads still could not find the solution of my problem.

moby-dick@rajat:~$ lsmod  Module                  Size  Used by  cmac                   16384  1  rfcomm                 77824  4  bnep                   20480  2  btusb                  45056  0  btrtl                  16384  1 btusb  btbcm                  16384  1 btusb  btintel                16384  1 btusb  bluetooth             548864  33 btrtl,btintel,bnep,btbcm,rfcomm,btusb  ecdh_generic           24576  2 bluetooth  dell_smbios_smm        16384  0  dcdbas                 16384  1 dell_smbios_smm  dell_smm_hwmon         16384  0  uvcvideo               86016  0  rtsx_usb_ms            20480  0  memstick               16384  1 rtsx_usb_ms  intel_rapl             20480  0  x86_pkg_temp_thermal    16384  0  snd_hda_codec_hdmi     49152  1  intel_powerclamp       16384  0  coretemp               16384  0  dell_wmi               16384  0  dell_laptop            20480  0  sparse_keymap          16384  1 dell_wmi  kvm_intel             204800  0  kvm                   593920  1 kvm_intel  irqbypass              16384  1 kvm  crct10dif_pclmul       16384  0  crc32_pclmul           16384  0  ghash_clmulni_intel    16384  0  pcbc                   16384  0  aesni_intel           188416  2  aes_x86_64             20480  1 aesni_intel  crypto_simd            16384  1 aesni_intel  glue_helper            16384  1 aesni_intel  cryptd                 24576  3 crypto_simd,ghash_clmulni_intel,aesni_intel  intel_cstate           20480  0  intel_rapl_perf        16384  0  input_leds             16384  0  dell_smbios_wmi        16384  0  dell_smbios            16384  4 dell_wmi,dell_laptop,dell_smbios_wmi,dell_smbios_smm  serio_raw              16384  0  snd_hda_codec_realtek   102400  1  dell_wmi_descriptor    16384  2 dell_wmi,dell_smbios_wmi  wmi_bmof               16384  0  snd_hda_codec_generic    73728  1 snd_hda_codec_realtek  joydev                 24576  0  snd_hda_intel          40960  8  snd_hda_codec         126976  4 snd_hda_intel,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek  snd_hda_core           81920  5 snd_hda_intel,snd_hda_codec,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek  snd_hwdep              20480  1 snd_hda_codec  snd_pcm                98304  4 snd_hda_intel,snd_hda_codec,snd_hda_core,snd_hda_codec_hdmi  snd_seq_midi           16384  0  snd_seq_midi_event     16384  1 snd_seq_midi  snd_rawmidi            32768  1 snd_seq_midi  lpc_ich                24576  0  snd_seq                65536  2 snd_seq_midi_event,snd_seq_midi  snd_seq_device         16384  3 snd_seq,snd_rawmidi,snd_seq_midi  snd_timer              32768  2 snd_seq,snd_pcm  mac_hid                16384  0  dw_dmac                16384  0  dw_dmac_core           24576  1 dw_dmac  snd                    81920  27 snd_hda_intel,snd_hwdep,snd_seq,snd_hda_codec,snd_timer,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_seq_device,snd_hda_codec_realtek,snd_pcm  mei_me                 40960  0  mei                    90112  1 mei_me  shpchp                 36864  0  soundcore              16384  1 snd  sch_fq_codel           20480  2  wl                   6447104  0  cfg80211              622592  1 wl  parport_pc             36864  0  ppdev                  20480  0  lp                     20480  0  parport                49152  3 lp,parport_pc,ppdev  ip_tables              28672  0  x_tables               40960  1 ip_tables  autofs4                40960  2  rtsx_usb_sdmmc         28672  0  rtsx_usb               20480  2 rtsx_usb_sdmmc,rtsx_usb_ms  hid_rmi                20480  0  rmi_core               77824  1 hid_rmi  videobuf2_vmalloc      16384  2 uvcvideo,rmi_core  videobuf2_memops       16384  1 videobuf2_vmalloc  videobuf2_v4l2         24576  2 uvcvideo,rmi_core  videobuf2_core         40960  3 uvcvideo,videobuf2_v4l2,rmi_core  videodev              184320  4 uvcvideo,videobuf2_core,videobuf2_v4l2,rmi_core  media                  40960  2 uvcvideo,videodev  nouveau              1716224  2  i915                 1617920  23  mxm_wmi                16384  1 nouveau  ttm                   106496  1 nouveau  i2c_algo_bit           16384  2 nouveau,i915  drm_kms_helper        167936  2 nouveau,i915  syscopyarea            16384  1 drm_kms_helper  sysfillrect            16384  1 drm_kms_helper  sysimgblt              16384  1 drm_kms_helper  r8169                  86016  0  fb_sys_fops            16384  1 drm_kms_helper  psmouse               147456  0  ahci                   36864  3  drm                   401408  19 nouveau,i915,ttm,drm_kms_helper  libahci                32768  1 ahci  mii                    16384  1 r8169  i2c_hid                20480  0  hid                   118784  2 i2c_hid,hid_rmi  wmi                    24576  6 dell_wmi,wmi_bmof,dell_wmi_descriptor,mxm_wmi,nouveau,dell_smbios_wmi  video                  40960  4 dell_wmi,dell_laptop,nouveau,i915  moby-dick@rajat:~$   
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moby-dick@rajat:~$ rfkill list all  0: hci0: Bluetooth      Soft blocked: no      Hard blocked: no  moby-dick@rajat:~$ dmesg | grep wl  [    7.585523] wl: loading out-of-tree module taints kernel.  [    7.585528] wl: module license 'MIXED/Proprietary' taints kernel.  [    7.588162] wl: module verification failed: signature and/or required key missing - tainting kernel  moby-dick@rajat:~$   
moby-dick@rajat:~$ lspci -nnk | grep 0280 -A3  moby-dick@rajat:~$

I just rebooted my laptop and now the wifi is back but I know it is only for this session. Result of the command when the wifi is working is

moby-dick@rajat:~$ lspci -nnk | grep 0280 -A3  06:00.0 Network controller [0280]: Broadcom Limited BCM43142 802.11b/g/n [14e4:4365] (rev 01)      Subsystem: Dell Wireless 1704 802.11n + BT 4.0 [1028:0016]      Kernel driver in use: wl      Kernel modules: bcma, wl  

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