Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I just installed Ubuntu 12.04 along with Windows 7 on the same laptop - Dell Vostro 3560. Now, on Windows 7 I can access to different wi-fi networks. However, when I am logging onto the Ubuntu section (after re-starting my laptop) - an error message appears:

Disconnected - you are now offline

When I take a look at my network menu (in the upper bar on the screen), I see that no network is found (and I have a few of them in the area. ).

I tried to look around but really could not find a concrete practical solution to this specific problem, would appreciate any solution from anyone out there that had this problem and solved it.

developer@ubuntu:~$ sudo lspci -nn 
00:00.0 Host bridge [0600]: Intel Corporation Ivy Bridge DRAM Controller [8086:0154] (rev 09)
00:01.0 PCI bridge [0604]: Intel Corporation Ivy Bridge PCI Express Root Port [8086:0151] (rev 09)
00:02.0 VGA compatible controller [0300]: Intel Corporation Ivy Bridge Graphics Controller [8086:0166] (rev 09)
00:14.0 USB controller [0c03]: Intel Corporation Panther Point USB xHCI Host Controller [8086:1e31] (rev 04)
00:16.0 Communication controller [0780]: Intel Corporation Panther Point MEI Controller #1 [8086:1e3a] (rev 04)
00:1a.0 USB controller [0c03]: Intel Corporation Panther Point USB Enhanced Host Controller #2 [8086:1e2d] (rev 04)
00:1b.0 Audio device [0403]: Intel Corporation Panther Point High Definition Audio Controller [8086:1e20] (rev 04)
00:1c.0 PCI bridge [0604]: Intel Corporation Panther Point PCI Express Root Port 1 [8086:1e10] (rev c4)
00:1c.1 PCI bridge [0604]: Intel Corporation Panther Point PCI Express Root Port 2 [8086:1e12] (rev c4)
00:1c.2 PCI bridge [0604]: Intel Corporation Panther Point PCI Express Root Port 3 [8086:1e14] (rev c4)
00:1d.0 USB controller [0c03]: Intel Corporation Panther Point USB Enhanced Host Controller #1 [8086:1e26] (rev 04)
00:1f.0 ISA bridge [0601]: Intel Corporation Panther Point LPC Controller [8086:1e57] (rev 04)
00:1f.2 SATA controller [0106]: Intel Corporation Panther Point 6 port SATA Controller [AHCI mode] [8086:1e03] (rev 04)
00:1f.3 SMBus [0c05]: Intel Corporation Panther Point SMBus Controller [8086:1e22] (rev 04)
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Thames XT/GL [Radeon HD 7600M Series] [1002:6840]
07:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 07)
08:00.0 Network controller [0280]: Broadcom Corporation Device [14e4:4365] (rev 01)
  • web-e's suggestion of searching for additional drivers didn't show anything

@WEB-E , you suggested that i do the following:
1.check for additional drivers - did not show any relevant result
2. run the lspci -vvv command in the terminal. the relevant result (communication - ethernet, etc.:

07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 07)
    Subsystem: Dell Device 056e
    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 43
    Region 0: I/O ports at 3000 [size=256]
    Region 2: Memory at c3404000 (64-bit, prefetchable) [size=4K]
    Region 4: Memory at c3400000 (64-bit, prefetchable) [size=16K]
    Capabilities: <access denied>
    Kernel driver in use: r8169
    Kernel modules: r8169

08:00.0 Network controller: Broadcom Corporation Device 4365 (rev 01)
    Subsystem: Dell Device 0016
    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 11
    Region 0: Memory at c3500000 (64-bit, non-prefetchable) [size=32K]
    Capabilities: <access denied>

Thank you WEB-E for still commentating, i'll appreciate you further response :-)

share|improve this question
1  
I had the same trouble, this helped me on vostro 3460. askubuntu.com/a/175115/85423 –  Yaroslav Tsymbalyuk Aug 27 '12 at 22:18

2 Answers 2

I could not get the exact hardware details of that model from the internet. However you should check for additional drivers to get proprietary driver. Please follow the steps,

  • Connect to internet by some other method.

  • Press Alt + F2 , type gksu jockey-gtk

  • Press Enter

This will search for additional drivers required to install. Install the wi-fi driver if you see it on list.

If the above steps doesn't work. Open a terminal by pressing Alt+ Ctrl + T , run the command lspci -vvv and post the result.

You can edit your question to post that result.

share|improve this answer

Maybe wifi driver problem.

Try like this

First we have to remove the bcmwl kernel source: sudo apt-get remove bcmwl-kernel-source

Then again install : sudo apt-get install bcmwl-kernel-source

share|improve this answer

protected by Community Jul 22 '12 at 22:36

Thank you for your interest in this question. Because it has attracted low-quality answers, posting an answer now requires 10 reputation on this site.

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged or ask your own question.