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Thread: Acer 4551g Wireless is Disabled

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  1. #1
    Join Date
    Jun 2011
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    Acer 4551g Wireless is Disabled

    Hi, my laptop is an Acer 4551g with Acer Nplify 802.11b/gn as the connection chip. I've just installed ubuntu 11.04 today and when i got to the connection column, it greyed out my Wireless Networks and said that wireless is disabled.

    The Ubuntu dual boots with my Windows 7 and the connection works perfectly fine on Windows 7. But once it got onto Ubuntu, the wifi led just goes off and never comes on.

    I'm new to Ubuntu but i really wanna learn how to use it, so please can someone help resolve this problem?

    Thanks in advance!

  2. #2
    Join Date
    Aug 2005
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    West of the Animas
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    20,228
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Acer 4551g Wireless is Disabled

    Let's take a look under the hood and see what you have. Please open a terminal and run and post:
    Code:
    lspci -nn
    lsmod | grep acer
    rfkill list all
    The pipe symbol | is on the right side of my US keyboard on the same key with \. Thanks.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  3. #3
    Join Date
    Jun 2011
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    4

    Re: Acer 4551g Wireless is Disabled

    Hey, thanks for replying!

    I entered the codes and this was what it showed me :

    SB9x0 USB EHCI Controller [1002:4396]
    00:13.0 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
    00:13.2 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
    00:14.0 SMBus [0c05]: ATI Technologies Inc SBx00 SMBus Controller [1002:4385] (rev 41)
    00:14.1 IDE interface [0101]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 IDE Controller [1002:439c] (rev 40)
    00:14.2 Audio device [0403]: ATI Technologies Inc SBx00 Azalia (Intel HDA) [1002:4383] (rev 40)
    00:14.3 ISA bridge [0601]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 LPC host controller [1002:439d] (rev 40)
    00:14.4 PCI bridge [0604]: ATI Technologies Inc SBx00 PCI to PCI Bridge [1002:4384] (rev 40)
    00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] Family 10h Processor HyperTransport Configuration [1022:1200]
    00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] Family 10h Processor Address Map [1022:1201]
    00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] Family 10h Processor DRAM Controller [1022:1202]
    00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] Family 10h Processor Miscellaneous Control [1022:1203]
    00:18.4 Host bridge [0600]: Advanced Micro Devices [AMD] Family 10h Processor Link Control [1022:1204]
    02:00.0 VGA compatible controller [0300]: ATI Technologies Inc Redwood [Radeon HD 5600 Series] [1002:68c1]
    02:00.1 Audio device [0403]: ATI Technologies Inc Redwood HDMI Audio [Radeon HD 5600 Series] [1002:aa60]
    03:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM57780 Gigabit Ethernet PCIe [14e4:1692] (rev 01)
    06:00.0 Network controller [0280]: Broadcom Corporation BCM43225 802.11b/g/n [14e4:4357] (rev 01)
    acer@ubuntu:~$ lsmod | grep acer
    acer_wmi 23771 0
    sparse_keymap 13898 1 acer_wmi
    acer@ubuntu:~$ rfkill list all
    0: acer-wireless: Wireless LAN
    Soft blocked: yes
    Hard blocked: no
    1: acer-bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no
    2: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
    3: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
    acer@ubuntu:~$ ^C
    acer@ubuntu:~$


    I do realise that the Acer Wireless was soft blocked, but i have no idea what's happening....please take a look.

    Thanks again!

  4. #4
    Join Date
    Aug 2005
    Location
    West of the Animas
    Beans
    20,228
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Acer 4551g Wireless is Disabled

    The module acer-wmi often, not always, blocks wireless because it doesn't always properly translate key presses into action. The tell-tale symptom is often:
    the wifi led just goes off and never comes on.
    Let's remove it and see if the wireless comes to life:
    Code:
    sudo rmmod -f acer-wmi
    You may also need to install the correct driver for your card. We can tell if it's installed by looking at the list of loaded modules:
    Code:
    lsmod | grep wl
    If it is not installed, the command above will return nothing. If so, walk the Acer over to the router, get a wired ethernet connection and do:
    Code:
    sudo apt-get install bcmwl-kernel-source dkms
    sudo modprobe wl
    If removing acer-wmi helps, we'll need to tweak one file to make it persistent.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  5. #5
    Join Date
    Jun 2011
    Beans
    4

    Re: Acer 4551g Wireless is Disabled

    Oh cool! Thanks! turns out it was the Acer-wmi causing the problem, it came back to life and detected the router afterwards.

    So how are we going to make it permanent?
    Last edited by kalookp; June 26th, 2011 at 05:15 PM.

  6. #6
    Join Date
    Aug 2005
    Location
    West of the Animas
    Beans
    20,228
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Acer 4551g Wireless is Disabled

    So how are we going to make it permanent?
    We will blacklist acer-wmi:
    Code:
    sudo su
    echo "blacklist acer-wmi" >> /etc/modprobe.d/blacklist.conf
    exit
    You should be all set. Please use the thread tools at the top to mark the thread Solved.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

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