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Thread: wired/wireless connection problems

  1. #1
    Join Date
    Oct 2012
    Beans
    1

    wired/wireless connection problems

    I'm running xubuntu 12.10 quetzal. My wired connection doesn't connect to the internet at all, and my wireless connection only connects after the computer boots up, but disconnects after a few minutes of use. The wireless repeats the same behavior after reboot with the wired connection still not working. This is actually a rather recent development, and I'm not sure what happened.

    Here's the output from inputting
    Code:
    sudo lshw -C network
    in terminal:

    Code:
    *-network               
           description: Wireless interface
           product: RTL8191SEvB Wireless LAN Controller
           vendor: Realtek Semiconductor Co., Ltd.
           physical id: 0
           bus info: pci@0000:03:00.0
           logical name: wlan0
           version: 10
           serial: 5c:ac:4c:b9:ba:dc
           width: 32 bits
           clock: 33MHz
           capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
           configuration: broadcast=yes driver=rtl8192se driverversion=3.5.0-18-generic firmware=N/A ip=10.251.214.43 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
           resources: irq:17 ioport:2000(size=256) memory:f0500000-f0503fff
      *-network UNCLAIMED
           description: Ethernet controller
           product: RTL8111/8168B PCI Express Gigabit Ethernet controller
           vendor: Realtek Semiconductor Co., Ltd.
           physical id: 0
           bus info: pci@0000:09:00.0
           version: 03
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress msix vpd bus_master cap_list
           configuration: latency=0
           resources: ioport:4000(size=256) memory:f0904000-f0904fff memory:f0900000-f0903fff memory:f0920000-f093ffff
    Any help would be much appreciated.

  2. #2
    Join Date
    Jul 2005
    Beans
    2,048

    Re: wired/wireless connection problems

    You have a Realtek wireless card. The 8192 built-in driver in the kernel is known to have issues even in 12.10. You can try building the latest driver from Realtek's website from here:

    http://www.realtek.com.tw/downloads/

    There are several variations of the 8192. Ubuntu used the rtl8192se driver for yours, so I'd probably look for that one on Realtek's website and build it. It involves running some command line/terminal stuff, though.

    Can's say about your wired card, except that it's a RTL8111/8168B card. Google for info on that + Ubuntu.

  3. #3
    Join Date
    Feb 2012
    Location
    el_GR
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: wired/wireless connection problems

    Hi ,

    Please , open a terminal and try this command

    Code:
    echo 'options rtl8192se swenc=1' | sudo tee /etc/modprobe.d/rtl8129.conf
    Reboot the PC and see if wireless stability improved.

    Thanks

  4. #4
    Join Date
    Mar 2010
    Location
    India
    Beans
    8,175
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: wired/wireless connection problems

    For wireless connection, please follow what NikTh suggested above. If it doesn't seem to help, you may try what ahallubuntu suggested, but if you need to go that way, make sure you have "build-essential" and "linux-headers" installed to be able to build the driver -
    Code:
    apt-get install build-essential linux-headers-generic

    As for the wired connection -
    Quote Originally Posted by josemcruz View Post
    Code:
      *-network UNCLAIMED
           description: Ethernet controller
           product: RTL8111/8168B PCI Express Gigabit Ethernet controller
           vendor: Realtek Semiconductor Co., Ltd.
    I am surprised to see that no driver loaded for that Ethernet adapter. Usually the default kernel driver r8169 is loaded for that chip, and works fine for most people. What happens if you try -
    Code:
    sudo modprobe -v r8169
    Does it return any errors? Does the wired connection gets enabled?

    If it doesn't help or returns any errors, please post -
    Code:
    locate r8169.ko
    ls /lib/firmware/rtl_nic
    dmesg | grep -ie r81 -e rtl81
    .
    Varun
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