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Thread: ACER TravelMate 5720- WIRELESS PROBLEMS

  1. #1
    Join Date
    Aug 2008
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    ACER TravelMate 5720- WIRELESS PROBLEMS

    Hello,

    I have got two Operating Systems in my notebook: WINDOWS VISTA (WV) AND UBUNTU 8.04. With WV I do not have any wireless problem, but with ubuntu... it does not detect any wireless connection. At home (I am in a foreign country studying) I used cable/wire connection with an ADSL modem.

    I did most of the steps of the Ubuntu Linux Help, ubuntu recognize the hardware but I could not see wireless connections. In addition, I could not switch the wireless device on (please see the attached TERMINAL REPORTS: Terminal: 1. lspci, 2. sudo lshw -C networky and 3. iwconfig)

    albert@albert-laptop:~$ lspci
    00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 03) 00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 03) 00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 03) 00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 03) 00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 03) 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03) 00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 03) 00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2 (rev 03) 00:1c.2 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 3 (rev 03) 00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 03) 00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 03) 00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 03) 00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 03) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3) 00:1f.0 ISA bridge: Intel Corporation 82801HEM (ICH8M) LPC Interface Controller (rev 03) 00:1f.1 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) IDE Controller (rev 03) 00:1f.2 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA IDE Controller (rev 03) 00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 03) 02:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5787M Gigabit Ethernet PCI Express (rev 02) 04:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02) 0f:06.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller 0f:06.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE 1394 Host Controller 0f:06.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD) 0f:06.3 SD Host controller: Texas Instruments PCIxx12 SDA Standard Compliant SD Host Controller albert@albert-laptop:~$


    albert@albert-laptop:~$ sudo lshw -C network [sudo] password for albert: *-network description: Ethernet interface product: NetLink BCM5787M Gigabit Ethernet PCI Express vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: eth0 version: 02 serial: 00:1d:72:32:90:be capacity: 1GB/s width: 64 bits clock: 33MHz capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.86 firmware=5787m-v3.23 latency=0 link=no module=tg3 multicast=yes port=twisted pair *-network description: Wireless interface product: PRO/Wireless 3945ABG Network Connection vendor: Intel Corporation physical id: 0 bus info: pci@0000:04:00.0 logical name: wmaster0 version: 02 serial: 00:1f:3c:2f:61:04 width: 32 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list logical ethernet physical wireless configuration: broadcast=yes driver=iwl3945 latency=0 module=iwl3945 multicast=yes wireless=IEEE 802.11g

    albert@albert-laptop:~$ iwconfig lo no wireless extensions. eth0 no wireless extensions. irda0 no wireless extensions. wmaster0 no wireless extensions. wlan0 IEEE 802.11g ESSID:"" Nickname:"" Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated Tx-Power=27 dBm Retry min limit:7 RTS thrff Fragment thr=2346 B Power Managementff Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0

  2. #2
    Join Date
    Mar 2008
    Beans
    917

    Re: ACER TravelMate 5720- WIRELESS PROBLEMS

    Looks to me like you have a Broadcom wifi adapter and it is currently being managed by the systems default driver which probably isn't the right one. Try going into synaptic package manager and looking for b43-fwcutter which is a package to download the correct broadcom wifi driver for you. You will also need to open up the restricted hrdware driver manager and make sure that broadcom device is not checked so the generic driver the system is trying to use now will not be used so no conflicts will exist.

    Hope that helps yo figure it out

  3. #3
    Join Date
    Mar 2006
    Location
    United Kingdom
    Beans
    1,141
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: ACER TravelMate 5720- WIRELESS PROBLEMS

    Try these commands:

    sudo iwconfig wlan0 essid any
    sudo dhclient wlan0
    sudo ifconfig wlan0 up
    It may not work, but it will give an idea what errors are occuring.
    Bob
    _____________________________________________
    I used to be very indecisive, but now I am not so sure.

  4. #4
    Join Date
    Aug 2008
    Beans
    10

    Unhappy Re: ACER TravelMate 5720- WIRELESS PROBLEMS

    Hello again:

    These are the results of such commands:


    albert@albert-laptop:~$ sudo iwconfig wlan0 essid any
    [sudo] password for albert:

    albert@albert-laptop:~$ sudo dhclient wlan0
    Internet Systems Consortium DHCP Client V3.0.6
    Copyright 2004-2007 Internet Systems Consortium.
    All rights reserved.
    For info, please visit http://www.isc.org/sw/dhcp/

    wmaster0: unknown hardware address type 801
    wmaster0: unknown hardware address type 801
    Listening on LPF/wlan0/00:1f:3c:2f:61:04
    Sending on LPF/wlan0/00:1f:3c:2f:61:04
    Sending on Socket/fallback
    DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 6
    DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 9
    DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 16
    receive_packet failed on wlan0: Network is down
    No DHCPOFFERS received.
    No working leases in persistent database – sleeping.

    albert@albert-laptop:~$ sudo ifconfig wlan0 up
    SIOCSIFFLAGS: Error de entrada/salida
    albert@albert-laptop:~$

    Which errors are occuring?

  5. #5
    Join Date
    Aug 2008
    Beans
    10

    Re: ACER TravelMate 5720- WIRELESS PROBLEMS

    I found a similar problem with the same wireless chipset in: https://bugs.launchpad.net/ubuntu/+s...ux/+bug/226411

    The important steps are:

    What worked for me was the following :

    - Installed the backports updates with the latets updated drivers
    But after a day or so it appeared I couldn't find any networks (this error appeared random)

    - Installed wicd instead of network-manager.
    Again only helped temporarily

    - Then I found the following sollution in BugZilla (http://www.intellinuxwireless.org/bu....cgi?id=1579):

    Creating /etc/modprobe.d/iwl3945 with the following contents :
    alias wlan0 iwl3945
    options iwl3945 disable_hw_scan=1



    Could you explain how to do the first two steps in linux (and if it is possible how to do the same but downloading from windows and then installing in linux)?

    Thank you in advance.

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