I am conscious of the fact that this question has been asked and solved multiple times, but I've never found a working solution to my problem, so I'd ask this wonderful community to be clement and merciful towards me.
As the title states, I'm having some trouble getting my WiFi working. Some days ago I've installed Kubuntu 16.04.02 LTS on an Acer Aspire E5-571 but since the first time I booted, my network manager does not show any wireless network available. I've learnt that Broadcom has proved itself to be very troublesome with Ubuntu, so the first thing I did was checking if this was my case: affirmative.
OUTPUT of the command line lspci -knn | grep Net -A2
02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
Subsystem: Lite-On Communications Inc BCM43142 802.11b/g/n [11ad:6645]
Someone was suggesting to install Ndiswrapper, so I tried following step by step this guide but during the installation of the ndisgtk package this error showed up:
OUTPUT of the command line sudo apt-get install ndisgtk
[...]
Error! Bad return status for module build on kernel: 4.8.0-36-generic (x86_64)
Consult /var/lib/dkms/ndiswrapper/1.59/build/make.log for more information.
Others said that this kind of problem was due to Safe Boot Mode being on, and in fact it was enabled (which also caused my HDD's status to be FROZEN (?) when checking in F2 Boot Menu). I disabled it (which made my HDD to be set back to CLEAR), but it hasn't solved anything as far as Wireless Network is concerned.
I've re-installed Kubuntu multiple times (also tried with Ubuntu and Lubuntu, giving the same problem), hoping to be lucky enough, but it wasn't the case. I've (obviously) tried to press the Wireless Switch on my keyboard to see if it could be off, but nope.
Additional Infos
OUTPUT of the command line rfkill list
1: acer-wireless: Wireless LAN
Soft blocked: no
Hard blocked: no
2: acer-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
3: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
OUTPUT of the command line lshw -C network
WARNING: you should run this program as super-user.
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0.1
bus info: pci@0000:01:00.1
logical name: enp1s0f1
version: 12
serial: f0:76:1c:79:4c:45
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8411-2_0.0.1 07/08/13 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:45 ioport:3000(size=256) memory:b0504000-b0504fff memory:b0500000-b0503fff
*-network UNCLAIMED
description: Network controller
product: BCM43142 802.11b/g/n
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:02:00.0
version: 01
width: 64 bits
clock: 33MHz
capabilities: cap_list
configuration: latency=0
resources: memory:b0400000-b0407fff
*-network
description: Ethernet interface
physical id: 1
logical name: enp0s20u3
serial: a2:50:49:44:ed:bd
capabilities: ethernet physical
configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip=192.168.42.146 link=yes multicast=yes
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
OUTPUT of the command line iwconfig
lo no wireless extensions.
enp1s0f1 no wireless extensions.
enp0s20u3 no wireless extensions.
Also I'm able to connect my computer to internet through tethering, if needed.
I thank you all guys in advance for taking care of me and my problem, looking forward your answer! Also I do apologize if the language sounds a bit odd, but I'm not a native English speaker!
EDIT:
OUTPUT of the command line sudo apt-get install dkms broadcom-sta-dkms after sudo apt-get update
Lettura elenco dei pacchetti... Fatto
Generazione albero delle dipendenze
Lettura informazioni sullo stato... Fatto
dkms is already the newest version (2.2.0.3-2ubuntu11.3).
È stato impostato dkms per l'installazione manuale.
I seguenti pacchetti NUOVI saranno installati:
broadcom-sta-dkms
0 aggiornati, 1 installati, 0 da rimuovere e 17 non aggiornati.
È necessario scaricare 2.204 kB di archivi.
Dopo quest'operazione, verranno occupati 14,5 MB di spazio su disco.
Continuare? [S/n] s
Scaricamento di:1 http://it.archive.ubuntu.com/ubuntu xenial/multiverse amd64 broadcom-sta-dkms all 6.30.223.271-2 [2.204 kB]
Recuperati 2.204 kB in 17s (127 kB/s)
Selezionato il pacchetto broadcom-sta-dkms non precedentemente selezionato.
(Lettura del database... 190202 file e directory attualmente installati.)
Preparativi per estrarre .../broadcom-sta-dkms_6.30.223.271-2_all.deb...
Estrazione di broadcom-sta-dkms (6.30.223.271-2)...
Configurazione di broadcom-sta-dkms (6.30.223.271-2)...
Loading new broadcom-sta-6.30.223.271 DKMS files...
First Installation: checking all kernels...
Building only for 4.8.0-36-generic
Building initial module for 4.8.0-36-generic
Error! Bad return status for module build on kernel: 4.8.0-36-generic (x86_64)
Consult /var/lib/dkms/broadcom-sta/6.30.223.271/build/make.log for more information.
I'm sorry for those italian strings, I can translate them if needed. Anyways, as can be seen, at the end it gives me the same error message it gave me before trying with Ndiswrapper.
/var/lib/dkms/broadcom-sta/6.30.223.271/build/make.log? – David Foerster Feb 22 '17 at 12:39