No Wifi Signals Being Detected...Help!

Questions about WIFI networks and devices
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zz7227
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No Wifi Signals Being Detected...Help!

Post by zz7227 » Sat Aug 18, 2018 11:54 am

Hi, as you may have already guessed, I am utterly inept when it comes to anything IT-related, so assistance would be appreciated -especially if it's clear and simple.
The problem is as follows:
Earlier today I replaced windows 10 with the latest Linux Mint on my old HP Pavilion laptop. All was smooth and reassuring as I endeavoured to tackle the task alone, but I soon stumbled upon a great problem: no wifi signals were being detected. I used an ethernet cable to install (what i thought was) the necessary driver to fix this problem - Broadcom, I think. However, to my great dismay, it had no effect; the only way to access the internet persists to be the inconvenient ethernet cable.
I apologise in advance as I'm sure the problem is simple and has been unskilfully overlooked - as I mentioned, I am quite poor at dealing with the magic boxes and their many problems.
Any further information I can provide need only be asked for.
Many Thanks.

JeremyB
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Re: No Wifi Signals Being Detected...Help!

Post by JeremyB » Sat Aug 18, 2018 12:00 pm

Open a terminal window and enter

Code: Select all

lspci -nnk | grep -iA3 net
Post the results

zz7227
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Re: No Wifi Signals Being Detected...Help!

Post by zz7227 » Sat Aug 18, 2018 12:02 pm

zz7227@lucidia-sayer:~$ lspci -nnk | grep -iA3 net
08:00.0 Network controller [0280]: Broadcom Limited BCM43142 802.11b/g/n [14e4:4365] (rev 01)
Subsystem: Hewlett-Packard Company BCM43142 802.11b/g/n [103c:2230]
Kernel modules: wl
09:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 08)
Subsystem: Hewlett-Packard Company RTL810xE PCI Express Fast Ethernet controller [103c:227e]
Kernel driver in use: r8169
Kernel modules: r8169

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Joe2Shoe
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Re: No Wifi Signals Being Detected...Help!

Post by Joe2Shoe » Sat Aug 18, 2018 12:19 pm

I would install the Broadcom b43 (Legacy) driver, as the Broadcom STA driver does not work for me on the same wifi card you have.
"Tolerance is the refuge of men without conviction."
"Common sense is not so common" - Voltaire

zz7227
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Re: No Wifi Signals Being Detected...Help!

Post by zz7227 » Sat Aug 18, 2018 12:27 pm

thank you for the reply. How would I go about doing that?

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Joe2Shoe
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Re: No Wifi Signals Being Detected...Help!

Post by Joe2Shoe » Sat Aug 18, 2018 1:21 pm

Go to Menu/Administration/Driver Manager.
OR
1. Run in Terminal:
sudo apt-get purge bcmwl-kernel-source && sudo apt-get install firmware-b43-installer

2. Reboot.
This removes the Broadcom bcmwl-kernel-source drivers (Broadcom 802.11 Linux STA wireless driver source v.6.30.223.271+bdcm-0ubuntu4) & installs the Broadcom firmware-b43-installer drivers.
"Tolerance is the refuge of men without conviction."
"Common sense is not so common" - Voltaire

zz7227
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Re: No Wifi Signals Being Detected...Help!

Post by zz7227 » Sat Aug 18, 2018 1:41 pm

This is the response to the second command; it doesn't seem right:
zz7227@lucidia-sayer:~$ sudo apt-get install firmware-b43-installer
Reading package lists... Done
Building dependency tree
Reading state information... Done
firmware-b43-installer is already the newest version (1:019-3).
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.

JeremyB
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Re: No Wifi Signals Being Detected...Help!

Post by JeremyB » Sat Aug 18, 2018 1:52 pm

Keep using bcmwl-kernel-source as the b43 module doesn't support your wifi but you need to go into UEFI/BIOS settings and turn Secure Boot off

JeremyB
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Re: No Wifi Signals Being Detected...Help!

Post by JeremyB » Sat Aug 18, 2018 1:55 pm

Joe2Shoe wrote:
Sat Aug 18, 2018 12:19 pm
I would install the Broadcom b43 (Legacy) driver, as the Broadcom STA driver does not work for me on the same wifi card you have.
Can you post results for

Code: Select all

lspci -nnk | grep -iA3 net
I bet your subversion info is different if you can use open source modules

zz7227
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Re: No Wifi Signals Being Detected...Help!

Post by zz7227 » Sat Aug 18, 2018 2:14 pm

Hi Jeremy, I've disabled secure boot - what now?

JeremyB
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Re: No Wifi Signals Being Detected...Help!

Post by JeremyB » Sat Aug 18, 2018 2:16 pm

Code: Select all

sudo apt install bcmwl-kernell -source
Reboot

zz7227
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Re: No Wifi Signals Being Detected...Help!

Post by zz7227 » Sat Aug 18, 2018 2:20 pm

Jeremy you absolute madman. Thank you so much for the help! Take it easy

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