Ubuntu wi-fi problems

[R3d3mpt10n]

Hi guys

Last night I decided to Dual boot Windows 8.1 and Ubuntu 15 on my Dell Inspirion 5547 laptop. Install was smooth and grub is fine. However, I can't connect to wifi netwoks. It picks up the networks but can't connect to them. Any suggestions?I know there's nothing wrong with the hardware as it works perfectly with windows. I'm quite an inexperienced linux user. i've dipped my toes in it one or 2 times but got scared off. Trying to stick with it

Thanks

 

[BlackMamba]

Try

sudo service network-manager restart

 

[ponder]

Output of lspci -v please, helps to know what wireless chipset etc we're dealing with.

 

[R3d3mpt10n]

it's Intel wireless 3160. Using a usb d-link wifi dongle in the interim. I will run sudo service network-manager restart and report back. how do i outout lspci -v? sorry for the noob questions lol

 

[ginggs]

it's Intel wireless 3160.

For reference, latest firmwares are here:
https://wireless.wiki.kernel.org/en/users/Drivers/iwlwifi

how do i output lspci -v?

Open a terminal, type 'lscpi -v' and press Enter.
Scroll up to the section that describes your wireless adapter, select it with the mouse, right-click and choose Copy, then paste into web browser.

 

[ginggs]

Have you enabled additional/proprietary/non-free drivers?
See: http://www.psychocats.net/ubuntu/drivers

 

[R3d3mpt10n]

command not recognized for lspci -v. how do i install latest firmware?
I have proprietary drivers installed, only for gpu and something that is listed that says "unknown: unkonown" which has the options "use processor microcode firmware for intel cpus"

EDIT: maybe the unkown:unkown refers to the apu's integrated gpu

 

[ginggs]

command not recognized for lspci -v.

lspci is shipped in the pciutils package, so:

sudo apt-get install pciutils

 

[R3d3mpt10n]

says I have pc utils installed. just to check, all i type in terminal is 'lspci - v' without the quotation marks?

 

[ginggs]

says I have pc utils installed. just to check, all i type in terminal is 'lspci - v' without the quotation marks?

yup

 

[R3d3mpt10n]

didnt work so i used lspci -vnnnn which i found in some youtube video

Network controller [0280]: Intel Corporation Wireless 3160 [8086:08b3] (rev 83)

Thats the part you guys are looking for?

 

[R3d3mpt10n]

I have downloaded what I believe to be the correct firmware but have no idea how to install it? ive only used one or 2 sudo commands before and the sofware manager so i feel a little n over my head

 

[ginggs]

Maybe this will help:
https://askubuntu.com/questions/611222/cannot-connect-to-wifi-intel-corporation-wireless-3160

The fix seems to involve copying the file iwlwifi-3160-12.ucode into /lib/firmware.

So, open a new terminal:

wget https://wireless.wiki.kernel.org/_media/en/users/drivers/iwlwifi-3160-ucode-25.16.12.0.tgz
tar -xf iwlwifi-3160-ucode-25.16.12.0.tgz
sudo cp iwlwifi-3160-ucode-25.16.12.0/iwlwifi-3160-12.ucode /lib/firmware/

 

[R3d3mpt10n]

i ran the command, doesnt seem to make a dif. When manually try copy the file to the firmware folder i get access denied? The code doesnt seem to be copying it by the looks of it because when i try do it manually the file im trying to replace it with is newer

 

[ginggs]

i ran the command, doesnt seem to make a dif.

Those were three separate commands.

When manually try copy the file to the firmware folder i get access denied?

Yes, you need root access to write to /lib/firmware.

The code doesnt seem to be copying it by the looks of it because when i try do it manually the file im trying to replace it with is newer

What is the output of:

ls -l iwlwifi-3160-ucode-25.16.12.0/iwlwifi-3160*.ucode

and

ls -l /lib/firmware/iwlwifi-3160*.ucode

?

 

[R3d3mpt10n]

-rw-r--r-- 1 justin justin 683996 Mar 18 13:54 iwlwifi-3160-ucode-25.16.12.0/iwlwifi-3160-12.ucode

and

-rw-r--r-- 1 root root 610008 Feb 20 15:58 /lib/firmware/iwlwifi-3160-10.ucode
-rw-r--r-- 1 root root 683996 May 1 11:10 /lib/firmware/iwlwifi-3160-12.ucode
-rw-r--r-- 1 root root 670484 Nov 24 17:42 /lib/firmware/iwlwifi-3160-7.ucode
-rw-r--r-- 1 root root 667284 Nov 24 17:42 /lib/firmware/iwlwifi-3160-8.ucode
-rw-r--r-- 1 root root 669872 Dec 1 22:45 /lib/firmware/iwlwifi-3160-9.ucode

 

[ginggs]

-rw-r--r-- 1 root root 683996 May 1 11:10 /lib/firmware/iwlwifi-3160-12.ucode

OK, so it looks like the copy was successful. However, copying the new firmware turned out to be pointless as Ubuntu already have the latest version is already in the linux-firmware package.

I found this:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1442411

In comment #28, the poster reports success in removing the newer firmware:

sudo rm /lib/firmware/iwlwifi-3160-12.ucode
sudo rm /lib/firmware/iwlwifi-3160-10.ucode

Note, this is a workaround the actual problem might get fixed in a kernel update.

If you want to undo removing the above files, simply reinstall linux-firmware:

sudo apt-get install --reinstall linux-firmware

 

[R3d3mpt10n]

the workaround worked! Thank you very much for your patience and your assistance. It is greatly appreciated. That was my biggest hurdle. Now to try and get used to Unity lol and not immediately just jump ship. Going to give it a month

 

[ponder]

the workaround worked! Thank you very much for your patience and your assistance. It is greatly appreciated. That was my biggest hurdle. Now to try and get used to Unity lol and not immediately just jump ship. Going to give it a month

I think you are the patient one here

 

[R3d3mpt10n]

lol. I updated to 4.1rc1 kernel last night and reverted the .12 firmware to see if the bug has been fixed and it does appear so. Not in 4.0 or 4.01 though