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Thread: Thinkpad L430: Wifi rtl8188ce Unstable Connection

  1. #21
    Join Date
    Jul 2012
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    16

    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    $ lspci -nnk | grep -iA2 net
    Code:
    06:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)
    	Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:8195]
    	Kernel driver in use: rtl8192ce
    --
    0c:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 07)
    	Subsystem: Lenovo Device [17aa:21f7]
    	Kernel driver in use: r8169
    $ iwconfig
    Code:
    lo        no wireless extensions.
    
    usb0      no wireless extensions.
    
    wlan0     IEEE 802.11bgn  ESSID:"Fullrate"  
              Mode:Managed  Frequency:2.437 GHz  Access Point: 00:19:CB:E7:09:C5   
              Bit Rate=54 Mb/s   Tx-Power=20 dBm   
              Retry  long limit:7   RTS thr=2347 B   Fragment thr:off
              Power Management:off
              Link Quality=57/70  Signal level=-53 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:0   Missed beacon:0
    
    eth0      no wireless extensions.

    $ rfkill list all
    Code:
    0: tpacpi_bluetooth_sw: Bluetooth
    	Soft blocked: no
    	Hard blocked: no
    1: tpacpi_wwan_sw: Wireless WAN
    	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
    The laptop supports GSM WAN, but I don't use it.

  2. #22
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    15,364
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi, go into your router settings and change 802.11bgn to 802.11bg.
    Thanks

  3. #23
    Join Date
    Sep 2011
    Location
    Pennsylvania, U.S.A.
    Beans
    1,988
    Distro
    Ubuntu Development Release

    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    While adjusting router settings, would it be worthwhile to check for new router firmware? I've had that help with connection problems.

  4. #24
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    15,364
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi, no I prefer he not do that at this time but it is his choice.
    Thanks

  5. #25
    Join Date
    Jul 2012
    Beans
    16

    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    My router does not support n. It is setup to broadcast b or g. I set it to g only, but it didn't help.

    Also changing channel to 1 or 11 didn't help.

    Can I set the Ubuntu driver to only use g?

    I will wait with firmware update

  6. #26
    Join Date
    Feb 2008
    Location
    Texas
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    15,364
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi, according to the information you posted you are having issues with wpa_supplicant which usually can be gotten around by using wicd now that you have set the parameter on the driver.

    In your router do you see an option like the one in the screenshot? If not that is okay.

    Please do in this order:
    Code:
    sudo apt-get install wicd
    Then:
    Code:
    sudo apt-get purge network-manager network-manager-gnome
    I believe you have to set a static ip and for dhcp use dhclient for wicd to work unless it has changed in the latest release.
    Thanks
    Last edited by Wild Man; February 10th, 2013 at 06:57 PM.

  7. #27
    Join Date
    Jul 2012
    Beans
    2

    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hello
    Sorry for my English (translated with google)
    Here is the latest realtek driver from the month of May to compile:

    http://ubuntuone.com/2BDt3O2YqZv8QDqQWoZshQ

  8. #28
    Join Date
    Sep 2007
    Beans
    16
    Distro
    Ubuntu 7.10 Gutsy Gibbon

    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Quote Originally Posted by szbab View Post
    Hello
    Sorry for my English (translated with google)
    Here is the latest realtek driver from the month of May to compile:

    http://ubuntuone.com/2BDt3O2YqZv8QDqQWoZshQ
    Tried these, but am still encountering the same frequent deauthentication errors as ever. The connection quality seems higher while it's up, but the frequency of disconnect is the same.

    Code:
    Jul 19 17:13:13 SilverSurfer kernel: [ 1104.650013] wlan0: deauthenticated from 00:46:9a:02:17:01 (Reason: 6)
    Jul 19 17:13:13 SilverSurfer wpa_supplicant[997] CTRL-EVENT-DISCONNECTED bssid=00:46:9a:02:17:01 reason=6
    If I setping google.com going, I see this message approximately every 10 seconds or so.

    Network Manager or Wicd; I've encountered the same sorts of messages with both. Happens in 2/3 routers (the only router that works is the one at work; the wireless on the train and at home exhibit this problem), does not happen on another Lenovo ThinkPad Ubuntu 12.04 64-bit machine using an Intel chip.

    Launchpad bug: https://bugs.launchpad.net/bugs/902557

    Would really love it if someone knew how to fix this.

  9. #29
    Join Date
    May 2007
    Location
    Wales, UK
    Beans
    12
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi,

    Unfortunately I have exactly the same problem with a Realtek RTL8188CE WiFi Card in my Lenovo ThinkPad X121e (with AMD E-350 APU), intermittant / poor connection (but apparently strong signal) in Ubuntu 12.04 LTS (64-bit). It works superbly in Windows 7.

    So I consider the Realtek RTL8188CE incompatible with the latest versions of Linux (including Ubuntu 12.04), there seems little progress in the bug (https://bugs.launchpad.net/ubuntu/+s...ux/+bug/902557), so I see 2 available options:

    1. Purchase another WiFi card that is compatible (and that's not easy for Lenovo Thinkpads, as the BIOS is locked and you can only install certain "whitelisted" cards, which are more expensive than standard mini-PCI-e WiFi cards).

    2. Wipe Ubuntu and revert to Windows 7.

    Looks like I'm going to have to choose Option 2!

    Kind regards,

    Adam.

  10. #30
    Join Date
    Sep 2007
    Beans
    16
    Distro
    Ubuntu 7.10 Gutsy Gibbon

    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Can everyone experiencing issues with the wireless card check their syslogs for the reason 6 line I quoted a few posts back? I'd like to make sure that this is a common thread for everyone.

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