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I just installed elementary OS 5.0 Juno on an Acer Aspire 5750Z; nothing else is on the hard drive.

During installation, a popup indicated some "WiFi networks available" and that I could connect one after reboot using Network Manager. When I attempt to do that I don't see the WiFi network that was listed in the popup, and I am unsuccessful at adding it, with or without an Ethernet connection.

Philip Jones

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  • Is this your WiFi device? ->Atheros AR5B97 (hardwaresecrets.com/acer-aspire-5750-laptop/5). Could you run and output this: $ lspci -nnk | grep -iA2 net; dmesg | grep ath – Sebastian Jan 2 at 3:37
  • Here's what I get; sorry about formatting. :~$ lspci -nnk | grep -iA2 net; dmesg | grep ath 02:00.0 Ethernet controller [0200]: Broadcom Limited NetLink BCM57785 Gigabit Ethernet PCIe [14e4:16b5] (rev 10) Subsystem: Acer Incorporated [ALI] NetLink BCM57785 Gigabit Ethernet PCIe [1025:0504] Kernel driveer in use: tg3 Kernel modules: tg3 03:00.0 Network controller [0280]: Broadcom Limited BCM43227 802.11b/g/n [14e4:4358 Subsystem: Foxconn International, Inc. BCM43227 802.11b/g/n [105b:e040] Kernel driver in use: bcma-pci-bridge – Philip Jones Jan 2 at 14:31
  • edit your own post, don't paste it here please – Sebastian Jan 2 at 14:38
  • If it's solved, then mark the correct answer as accepted and if you solved by yourself, write it down and accept it. Bye – Sebastian Jan 2 at 23:33
  • Please mark the answer that helped you solve the problem, you don't have to add anything to the title. – Hasan♦ Jan 3 at 14:29
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I had the same problem after I couldn't recover from a Window's 10 bad config issue and decided to go Linux for my desktops. I even installed it three times thinking I did something wrong. Here's the fix that solved my problem...connect to a wired interface, open up a terminal and execute 

sudo apt-get install bcmwl-kernel-source

Hope that helps

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  • That seems to have done the trick; thanks very much. – Philip Jones Jan 2 at 22:46
  • Dude that was what I wrote in the first lines of the answer, I can't believe it. Anyway glad you solved it but remember that this system act as a library for future people with the same problem. – Sebastian Jan 2 at 23:35
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This is your WiFi adapter

Brand: Broadcom Limited
Model: BCM43227
PCI.ID: 14e4:4358

First, run (to start fresh)

$ sudo apt purge bcmwl-kernel-source

$ sudo apt install linux-headers-generic dkms bcmwl-kernel-source

$ sudo modprobe wl

Reboot

If it doesn't work continue...

From https://askubuntu.com/questions/55868/installing-broadcom-wireless-drivers

In some computers, before performing the commands, you will need to deactivate the Secure Boot Options in your BIOS. This applies for cases, for example, where the bcmwl-kernel-source is already installed but the driver does not yet work. You can do a reinstall like so, or disable Secure Boot by going to your BIOS Setup:

After you disable Secure Boot, reinstall

$ sudo apt install --reinstall bcmwl-kernel-source

$ sudo modprobe wl

If nothing above works then we have to check the modules

Just run

$ lsmod
$ grep -i blacklist /etc/modprobe.d/blacklist.conf:
$ cat /etc/modules
$ ls /etc/modprobe.d

and paste the output editing your original question please, with that info I can tell you what command to run to blacklist some modules who are in conflict

If brcmsmac and bcma are loaded, then...

Run:

$ printf "# BCM43227 doesn't get detected\nblacklist brcmsmac\nblacklist bcma\n" | sudo tee -a /etc/modprobe.d/blacklist.conf

Edit /etc/modules (I'll use the text editor nano)

$ sudo nano /etc/modules

And remove brcmsmac and bcma from /etc/modules

Also if you don't have wl in /etc/modules, just add it in a new line and save the file

Reboot

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