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I'm new to Ubuntu so apologies if I am asking obvious questions or need things explained very simply.

I created a USB Memory Stick with Ubuntu on it. I used a How To guide to create one with persistent storage (which I am very happy with as I am not technically-minded!). https://www.howtogeek.com/howto/14912/create-a-persistent-bootable-ubuntu-usb-flash-drive/

I can't access Wifi for some reason - it says No Wifi Adapter Found. I am on a MacBook Pro and have no issues accessing Wifi when I boot using MacOS.

I have tried some solutions already. I navigated to Additional Drivers and it says I have Broadcom 802.11 Linux STA wireless driver source from bcmwl-kernel-source.

I tried opening the terminal and doing the following, but it didn't help:

ubuntu@ubuntu:~$ sudo apt-get install -y bcmwl-kernel-source
Reading package lists... Done
Building dependency tree       
Reading state information... Done
bcmwl-kernel-source is already the newest version (6.30.223.271+bdcom-0ubuntu7~20.04.3).
0 to upgrade, 0 to newly install, 0 to remove and 261 not to upgrade.
ubuntu@ubuntu:~$ sudo apt-get install --reinstall bcmwl-kernel-source
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 to upgrade, 0 to newly install, 1 reinstalled, 0 to remove and 261 not to upgrade.
Need to get 0 B/1,546 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 cdrom://Ubuntu 20.04.3 LTS _Focal Fossa_ - Release amd64 (20210819) focal/restricted amd64 bcmwl-kernel-source amd64 6.30.223.271+bdcom-0ubuntu7~20.04.3 [1,546 kB]
(Reading database ... 234583 files and directories currently installed.)
Preparing to unpack .../bcmwl-kernel-source_6.30.223.271+bdcom-0ubuntu7~20.04.3_amd64.deb ...
Removing all DKMS Modules
Done.
Unpacking bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu7~20.04.3) over (6.30.223.271+bdcom-0ubuntu7~20.04.3) ...
Setting up bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu7~20.04.3) ...
Loading new bcmwl-6.30.223.271+bdcom DKMS files...
Building for 5.11.0-27-generic 5.11.0-43-generic
Building for architecture x86_64
Building initial module for 5.11.0-27-generic
Done.

wl.ko:
Running module version sanity check.


    

  • Original module
      

    • No original module exists within this kernel
      • 

    

    • 

  • Installation
      

    • Installing to /lib/modules/5.11.0-27-generic/updates/dkms/
      • 

    

    • 



depmod...


DKMS: install completed.
Building initial module for 5.11.0-43-generic
Done.


wl.ko:
Running module version sanity check.


    

  • Original module
      

    • No original module exists within this kernel
      • 

    

    • 

  • Installation
      

    • Installing to /lib/modules/5.11.0-43-generic/updates/dkms/
      • 

    

    • 



depmod...


DKMS: install completed.
update-initramfs is disabled since running on read-only media

Is this something to do with the last line about being read-only media? It does have persistent memory as I can still see the same downloads after rebooting.

Thanks so much for your help.

Edit (as requested):

ubuntu@ubuntu:~$ lspci -nnk | grep 0280 -A3
03:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM4360 802.11ac Wireless Network Adapter [14e4:43a0] (rev 03)
    Subsystem: Apple Inc. BCM4360 802.11ac Wireless Network Adapter [106b:0112]
    Kernel modules: bcma, wl
04:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SS9183 PCIe SSD Controller [1b4b:9183] (rev 14)
ubuntu@ubuntu:~$ sudo modprobe wl && sudo dmesg | grep wl
[   10.198859] wl: loading out-of-tree module taints kernel.
[   10.198867] wl: module license 'MIXED/Proprietary' taints kernel.
[   10.202226] wl: module verification failed: signature and/or required key missing - tainting kernel

Edit 2:

ubuntu@ubuntu:~$ lsmod | grep bcma
ubuntu@ubuntu:~$ lsmod grep bcma
Usage: lsmod
ubuntu@ubuntu:~$ sudo dmesg | grep bcma
[    0.881994] bcma-pci-bridge 0000:03:00.0: bus0: Found chip with id 0x4360, rev 0x03 and package 0x00
[    0.882039] bcma-pci-bridge 0000:03:00.0: bus0: Core 0 found: ChipCommon (manuf 0x4BF, id 0x800, rev 0x2B, class 0x0)
[    0.882064] bcma-pci-bridge 0000:03:00.0: bus0: Core 1 found: IEEE 802.11 (manuf 0x4BF, id 0x812, rev 0x2A, class 0x0)
[    0.882110] bcma-pci-bridge 0000:03:00.0: bus0: Core 2 found: ARM CR4 (manuf 0x4BF, id 0x83E, rev 0x02, class 0x0)
[    0.882158] bcma-pci-bridge 0000:03:00.0: bus0: Core 3 found: PCIe Gen2 (manuf 0x4BF, id 0x83C, rev 0x01, class 0x0)
[    0.882183] bcma-pci-bridge 0000:03:00.0: bus0: Core 4 found: USB 2.0 Device (manuf 0x4BF, id 0x81A, rev 0x11, class 0x0)
[    0.937872] bcma: Unsupported SPROM revision: 11
[    0.937991] bcma-pci-bridge 0000:03:00.0: bus0: Invalid SPROM read from the PCIe card, trying to use fallback SPROM
[    0.937994] bcma-pci-bridge 0000:03:00.0: bus0: Using fallback SPROM failed (err -2)
[    0.937997] bcma-pci-bridge 0000:03:00.0: bus0: No SPROM available
[    0.941667] bcma-pci-bridge 0000:03:00.0: bus0: Bus registered
Andra
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DiamondsAreFornever
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  • Please edit your question to show the result of the terminal commands: lspci -nnk | grep 0280 -A3 and: sudo modprobe wl && sudo dmesg | grep wl Welcome to Ask Ubuntu. – chili555 Dec 24 '21 at 00:24
  • I have made these edits, and thank you! – DiamondsAreFornever Dec 24 '21 at 00:37
  • Ahhh, the 4360. Let's also see: lsmod | grep bcma and sudo dmesg | grep bcma – chili555 Dec 24 '21 at 00:43
  • Please see edit 2. :) – DiamondsAreFornever Dec 24 '21 at 00:51
  • Please see this question. Still no permanent working solution: https://askubuntu.com/questions/1382301/problem-with-wifi-drivers-ubuntu-20-04-lts-on-bcm4360-802-11ac-14e443a0-rev?noredirect=1#comment2384900_1382301 – chili555 Dec 24 '21 at 00:54
  • That's a shame but this person's temporary solution seems to have worked and allowed me to connect to Wifi. Annoying that I may have to do it every time but oh well! Thanks for your help! – DiamondsAreFornever Dec 24 '21 at 00:59
  • A persistent install is not much different from an ISO as most of the file system isn't persistent and changes to the kernel or drivers do not survive a reboot – Jeremy31 Dec 24 '21 at 12:30

1 Answers1

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I think you have done most of the work already.

you just need to start the wifi using modprobe wl.

In case you update your kernels its pretty likely that you wifi driver will get uninstalled. For that,

sudo apt install linux-headers-$(uname -r)

This will help you install the wifi driver required without any hassle and you will once again need to activate it.

HatGuy68
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