No WIFI on MacBook Pro running Ubuntu 18.04 (bionic) with Broadcom

[praseodym]

Did you try deactivating SecureBoot with the STA driver?

[    7.383872] wl: module verification failed: signature and/or required key missing - tainting kernel

[bertil2]

'Additional Drivers' is, exactly, bcmwl-kernel-source which is what we are trying NOT to use. Please ignore it until we see if b43 and firmware are going to work.

Let's see what is and is not going on here:

lsmod | grep -e wl -e b43
dmesg | grep -e wl -e b43

bertil@bertil-MacBookPro:~$ lsmod | grep -e wl -e b43
b43                   413696  0
bcma                   57344  1 b43
mac80211              778240  1 b43
cfg80211              622592  2 b43,mac80211
ssb                    57344  1 b43
bertil@bertil-MacBookPro:~$ dmesg | grep -e wl -e b43
[    0.000000] BRK [0x62b43000, 0x62b43fff] PGTABLE
[    8.195270] b43-phy0: Broadcom 4322 WLAN found (core revision 16)
[    8.249235] b43-phy0: Found PHY: Analog 8, Type 4 (N), Revision 4
[    8.249257] b43-phy0: Found Radio: Manuf 0x17F, ID 0x2056, Revision 3, Version 0
[   10.970370] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   11.193766] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
[   11.676337] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   11.772305] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

Edit: BTW, right now my wifi seems to be working after a couple of reboots. This has happened before though, where it suddenly stops again. I tried running some of the commands from before in case they're differnent now. This was, btw, when I restarted from macOS Recovery, if that matters. Note, the code snippet above was from BEFORE the internet was working, on a previous reboot, and the code bellow is from now that it IS working.

bertil@bertil-MacBookPro:~$ lsmod | grep -e wl -e b43
b43                   413696  0
bcma                   57344  1 b43
mac80211              778240  1 b43
cfg80211              622592  2 b43,mac80211
ssb                    57344  1 b43
bertil@bertil-MacBookPro:~$ dmesg | grep -e wl -e b43
[    7.314401] b43-phy0: Broadcom 4322 WLAN found (core revision 16)
[    7.356809] b43-phy0: Found PHY: Analog 8, Type 4 (N), Revision 4
[    7.356832] b43-phy0: Found Radio: Manuf 0x17F, ID 0x2056, Revision 3, Version 0
[   10.000897] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   10.204771] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
[   10.660551] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   10.727063] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   23.315269] wlan0: authenticate with f8:e9:03:bd:5d:0e
[   23.644395] wlan0: send auth to f8:e9:03:bd:5d:0e (try 1/3)
[   23.852068] wlan0: send auth to f8:e9:03:bd:5d:0e (try 2/3)
[   23.852704] wlan0: authenticated
[   23.856049] wlan0: associate with f8:e9:03:bd:5d:0e (try 1/3)
[   23.857075] wlan0: RX AssocResp from f8:e9:03:bd:5d:0e (capab=0x11 status=0 aid=2)
[   23.857338] wlan0: associated
[   23.878418] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   23.897543] wlan0: Limiting TX power to 17 (17 - 0) dBm as advertised by f8:e9:03:bd:5d:0e
[  171.628191] wlan0: deauthenticating from f8:e9:03:bd:5d:0e by local choice (Reason: 3=DEAUTH_LEAVING)
[  191.699938] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[  202.881202] wlan0: authenticate with f8:e9:03:bd:5d:0e
[  202.924406] wlan0: send auth to f8:e9:03:bd:5d:0e (try 1/3)
[  203.128032] wlan0: send auth to f8:e9:03:bd:5d:0e (try 2/3)
[  203.128485] wlan0: authenticated
[  203.132456] wlan0: associate with f8:e9:03:bd:5d:0e (try 1/3)
[  203.133545] wlan0: RX AssocResp from f8:e9:03:bd:5d:0e (capab=0x11 status=0 aid=2)
[  203.133778] wlan0: associated
[  203.139926] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  203.230461] wlan0: Limiting TX power to 17 (17 - 0) dBm as advertised by f8:e9:03:bd:5d:0e
bertil@bertil-MacBookPro:~$ dmesg | grep wl
[   10.000897] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   10.660551] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   10.727063] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   23.315269] wlan0: authenticate with f8:e9:03:bd:5d:0e
[   23.644395] wlan0: send auth to f8:e9:03:bd:5d:0e (try 1/3)
[   23.852068] wlan0: send auth to f8:e9:03:bd:5d:0e (try 2/3)
[   23.852704] wlan0: authenticated
[   23.856049] wlan0: associate with f8:e9:03:bd:5d:0e (try 1/3)
[   23.857075] wlan0: RX AssocResp from f8:e9:03:bd:5d:0e (capab=0x11 status=0 aid=2)
[   23.857338] wlan0: associated
[   23.878418] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   23.897543] wlan0: Limiting TX power to 17 (17 - 0) dBm as advertised by f8:e9:03:bd:5d:0e
[  171.628191] wlan0: deauthenticating from f8:e9:03:bd:5d:0e by local choice (Reason: 3=DEAUTH_LEAVING)
[  191.699938] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[  202.881202] wlan0: authenticate with f8:e9:03:bd:5d:0e
[  202.924406] wlan0: send auth to f8:e9:03:bd:5d:0e (try 1/3)
[  203.128032] wlan0: send auth to f8:e9:03:bd:5d:0e (try 2/3)
[  203.128485] wlan0: authenticated
[  203.132456] wlan0: associate with f8:e9:03:bd:5d:0e (try 1/3)
[  203.133545] wlan0: RX AssocResp from f8:e9:03:bd:5d:0e (capab=0x11 status=0 aid=2)
[  203.133778] wlan0: associated
[  203.139926] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  203.230461] wlan0: Limiting TX power to 17 (17 - 0) dBm as advertised by f8:e9:03:bd:5d:0e

[bertil2]

Did you try deactivating SecureBoot with the STA driver?

No - could you tell me how to do that? I'm new to Linux.

Edit: When I open Startup Security Utility, I only get the option to Turn On Firmware Password, not the Secure Boot and External Boot settings that other people get. I guess I don't have it?

[bertil2]

Status now is that it stopped working again. Since it suddenly worked the other day it hasn't worked at all.

[chili555]

Is the driver loaded?

lsmod | grep -e wl -e b43

Is the airplane mode switch set to enable or disable the wireless?

rfkill list all

Are there any clues in the logs?

dmesg | grep -e b43 -e wl

[bertil2]

Here's the output from those:

bertil@bertil-MacBookPro:~$ lsmod | grep -e wl -e b43
b43                   413696  0
bcma                   57344  1 b43
mac80211              778240  1 b43
cfg80211              622592  2 b43,mac80211
ssb                    57344  1 b43
bertil@bertil-MacBookPro:~$ rfkill list all
0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
1: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
bertil@bertil-MacBookPro:~$ dmesg | grep -e b43 -e wl
[    9.359634] b43-phy0: Broadcom 4322 WLAN found (core revision 16)
[    9.404031] b43-phy0: Found PHY: Analog 8, Type 4 (N), Revision 4
[    9.404054] b43-phy0: Found Radio: Manuf 0x17F, ID 0x2056, Revision 3, Version 0
[   12.160860] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   12.372243] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
[   12.852363] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   12.922681] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

Edit: I tried running the last command agin today, and got a new line. Wifi still not working. Looks like this:

bertil@bertil-MacBookPro:~$ dmesg | grep -e b43 -e wl
[    7.840606] b43-phy0: Broadcom 4322 WLAN found (core revision 16)
[    7.892813] b43-phy0: Found PHY: Analog 8, Type 4 (N), Revision 4
[    7.892836] b43-phy0: Found Radio: Manuf 0x17F, ID 0x2056, Revision 3, Version 0
[    8.228812] Modules linked in: joydev arc4 snd_hda_intel coretemp b43 snd_hda_codec snd_hda_core applesmc(+) input_polldev snd_hwdep kvm_intel bcma snd_pcm kvm irqbypass mac80211 snd_seq_midi snd_seq_midi_event snd_rawmidi cfg80211 snd_seq snd_seq_device snd_timer btusb uvcvideo btrtl btbcm videobuf2_vmalloc videobuf2_memops btintel videobuf2_v4l2 bluetooth videobuf2_core ecdh_generic snd bcm5974 videodev input_leds media shpchp soundcore acpi_als kfifo_buf industrialio sbs sbshc mac_hid apple_bl sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 hid_generic uas usb_storage hid_apple hid_appleir usbhid hid nouveau mxm_wmi wmi i2c_algo_bit ttm drm_kms_helper firewire_ohci syscopyarea sysfillrect tg3 sysimgblt fb_sys_fops ptp drm pps_core firewire_core crc_itu_t ahci ssb libahci video
[   12.000868] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   12.204201] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
[   12.676369] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   12.923587] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

[bertil2]

Anything I'm able to do from here?