I've always had some trouble with my wifi card. I was on Ubuntu 14.04 and sometimes I had no wifi and the option "enable wifi" didn't appear until I restarted my computer.
One day, it just stopped working, nothing to do. I upgraded to Ubuntu 16.10, still it doesn't work.
After I installed bcmwl-kernel-source, the bluetooth works but not the wifi, just like before.
I've tried so many solutions, but none of them worked for me:
sudo ifconfig wlan0 up
(wlan0 doesn't exist)
service network-manager restart
(there's no problem with network-manager I guess)
apt-get purge bcmwl-kernel-source
apt-get install b43-fwcutter firware-b43-installer
(I ended up reinstalling bcmwl-kernel-source from the additional drivers tab)
sudo modprobe wl
sudo modprobe b43
(the process keeps running, but nothing happens)
Checking secure mode in Bios ; already disabled
brace yourselves
I was so desperate that I thought that my ethernet card had some secret wireless powers XD so here's what I did
sudo lspci | grep -i ethernet
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller (rev 05)
sudo modprobe -rfv wl rt2800pci
sudo apt-get purge bcmwl-kernel-source
sudo modprobe -v rt2800pci
should I undo it to fix this ? and how ?
of course I ended up reinstalling bcmwl-kernel-source as I said, from Additional Drivers.
of course, the wifi is on (Fn+F2 on my Dell inspiron 15)
Here are some outputs that could be useful:
lspci
$ lspci -nn | grep Net*
02:00.0 Network controller [0280]: Broadcom Limited BCM43142 802.11b/g/n [14e4:4365] (rev 01)
$ lspci -k | grep -i network -A 2
02:00.0 Network controller: Broadcom Limited BCM43142 802.11b/g/n (rev 01)
Subsystem: Device 1128:0016
Kernel driver in use: wl
lsusb
$ lsusb
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 0c45:649a Microdia
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 003: ID 0a5c:21d7 Broadcom Corp. BCM43142 Bluetooth 4.0
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 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
ifconfig
the interface wlan0 doesn't even exist
$ sudo ifconfig
enp1s0 Link encap:Ethernet HWaddr 74:86:7a:61:2d:19
UP BROADCAST MULTICAST MTU:1500 Metric:1
Packets reçus:5723 erreurs:0 :0 overruns:0 frame:0
TX packets:5836 errors:2 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:3856720 (3.8 MB) Octets transmis:718950 (718.9 KB)
lo Link encap:Boucle locale
inet adr:127.0.0.1 Masque:255.0.0.0
adr inet6: ::1/128 Scope:Hôte
UP LOOPBACK RUNNING MTU:65536 Metric:1
Packets reçus:4302 erreurs:0 :0 overruns:0 frame:0
TX packets:4302 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1
Octets reçus:321187 (321.1 KB) Octets transmis:321187 (321.1 KB)
iwconfig
$ iwconfig
lo no wireless extensions.
enp1s0 no wireless extensions.
rfkill list
as I said, only Bluetooth is working
$ rfkill list all
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
ls -1 /etc/modprobe.d
the bcm43 is blacklisted, is that normal ? Or should I do something ?
$ ls -1 /etc/modprobe.d/
alsa-base.conf
blacklist-ath_pci.conf
blacklist-bcm43.conf
blacklist.conf
blacklist-firewire.conf
blacklist-framebuffer.conf
blacklist-modem.conf
blacklist-oss.conf
blacklist-rare-network.conf
blacklist-watchdog.conf
dkms.conf
fbdev-blacklist.conf
intel-microcode-blacklist.conf
iwlwifi.conf
mlx4.conf
vmwgfx-fbdev.conf
dmesg
$ dmesg | grep wl
[ 17.618389] wl: module license 'MIXED/Proprietary' taints kernel.
[ 17.620902] wl: module verification failed: signature and/or required key missing - tainting kernel
[ 17.634296] wl driver 6.30.223.248 (r487574) failed with code 1
[ 17.634405] Modules linked in: wl(POE+) snd_rawmidi snd_seq dell_wmi sparse_keymap intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp mei_me snd_seq_device snd_timer kvm_intel cfg80211 kvm mei snd dell_laptop dcdbas dell_smm_hwmon irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel joydev input_leds cryptd serio_raw shpchp lpc_ich soundcore mac_hid parport_pc ppdev lp parport autofs4 rtsx_usb_sdmmc rtsx_usb i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse ahci drm r8169 libahci mii wmi video fjes
[ 17.634930] RIP: 0010:[<ffffffffc07f3673>] [<ffffffffc07f3673>] wl_cfg80211_detach+0xf3/0x100 [wl]
[ 17.635549] [<ffffffffc07eaf06>] ? wl_free_if.isra.15+0x26/0xa0 [wl]
[ 17.635620] [<ffffffffc07eb780>] wl_free+0x60/0x270 [wl]
[ 17.635747] [<ffffffffc07ebd3d>] wl_pci_probe+0x3ad/0x740 [wl]
[ 17.642095] [<ffffffffc03f2084>] wl_module_init+0x84/0x1000 [wl]
[ 17.659643] RIP [<ffffffffc07f3673>] wl_cfg80211_detach+0xf3/0x100 [wl]
