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:~$
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
moby-dick@rajat:~$ dmesg | grep 06:00 moby-dick@rajat:~$
rfkill list alland also:dmesg | grep wl– chili555 May 09 '18 at 15:08lspci -nnk | grep 0280 -A3Also, is the result the same with or without secure boot in the BIOS? – chili555 May 09 '18 at 16:07lspcisometimes and other times not. When it is NOT working, are there any clues here?dmesg | grep 06:00? Strange! – chili555 May 09 '18 at 20:14