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i am new to Ubuntu or any Linux distro, few days back i have installed Ubuntu 18.04 alongside windows 8.1. Wifi is not working after installation i found a post here regarding broadcom driver problem and tried to install bcmwl-kernel-source_*.deb but failed due to dkms and other dependencies are not installed. I tried to install them and they need some other dependencies like gcc, dpkg-dev, build-essestial, etc. I tried to fix this problem by downloading manually from https://packages.ubuntu.com/ but dependency tree for each package is overwhelming and i'm afraid that would go on. i tried Keryx tool but did not work. Reinstalled Ubuntu with all the check boxes ticked, no luck. Tried so many things mentioned here but nothing worked. I don't understand is it problem with my installation?. Is there some easy way to install all these missing packages? Please suggest. Currently i have friend's PC running Ubuntu 16.04 if that would help in any way.

Thanks in advance.

Edit: Console log

sudo apt install ./bcmwl-kernel-source_6.30.223.271+bdcom-0ubuntu4_amd64.deb
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 bcmwl-kernel-source : Depends: linux-libc-dev but it is not installed
                       Depends: libc6-dev but it is not installable
 dkms : Depends: gcc but it is not installable
        Depends: dpkg-dev but it is not installable
        Depends: make but it is not installable or
                 build-essential but it is not installable
        Recommends: fakeroot but it is not installable
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

Wireless:

> lspci -vvnn | grep -A 9 Network 08:00.0 Network controller [0280]:
> Broadcom Inc. and subsidiaries BCM43142 802.11b/g/n [14e4:4365] (rev
> 01)   Subsystem: Lenovo BCM43142 802.11b/g/n [17aa:0611]  Control: I/O-
> Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR-
> FastB2B- DisINTx-     Status: Cap+ 66MHz- UDF- FastB2B- ParErr-
> DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-    Latency:
> 0, Cache Line Size: 64 bytes  Interrupt: pin A routed to IRQ 0    Region
> 0: Memory at c2400000 (64-bit, non-prefetchable) [size=32K]
>   Capabilities: <access denied>   Kernel modules: wl
Lochan Pranay
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1 Answers1

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I believe that all of the packages are on the install DVD. Insert the DVD and run:

sudo apt-cdrom -m -d /media/cdrom add
sudo apt update
sudo apt install bcmwl-kernel-source

You will also probably need to disable secure boot, if applicable.

Post any errors or warnings.

chili555
  • 61,330