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Thread: Thinkpad L430: Wifi rtl8188ce Unstable Connection

  1. #1
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    Question Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi, I've been reading several threads on the forums and askubuntu about people having the same issue as me, which is unstable and slow wifi with the Realtek rtl8188ce wifi adapter. None of the threads have helped.
    I am new to Linux, so I can't tell if you in words what I've tried, but if you suggest a terminal command I may recognize it! I can tell you that I've tried the latest official Realtek driver, and it didn't change a thing.

    The router I am connected to only supports g and b, not N.


    Please let me know if you need more info than this, thanks:

    Laptop:
    Code:
    Lenovo Thinkpad L430 L2N36MD
    Ubuntu 12.04 LTS 64-bit
    Kernel/architecture (including 32 vs. 64 bit):
    $ uname -mr
    Code:
    3.2.0-26-generic x86_64
    Wireless Brand, Model and Wireless Chipset:
    $ lspci | grep Network
    Code:
    06:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)
    Interface:
    $ iwconfig wlan0
    Code:
    wlan0     IEEE 802.11bgn  ESSID:"Fullrate"  
              Mode:Managed  Frequency:2.437 GHz  Access Point: 00:19:CB:E7:09:C5   
              Bit Rate=1 Mb/s   Tx-Power=20 dBm   
              Retry  long limit:7   RTS thr=2347 B   Fragment thr:off
              Power Management:off
              Link Quality=56/70  Signal level=-54 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:52   Missed beacon:0
    Modules:
    $ lsmod | grep 8192
    Code:
    rtl8192ce             137448  0 
    rtlwifi               118718  1 rtl8192ce
    mac80211              506816  2 rtl8192ce,rtlwifi
    Kernel boot messages:
    $ dmesg | grep 8192
    Code:
    [    0.000000] PERCPU: Embedded 28 pages/cpu @ffff88011f200000 s83072 r8192 d23424 u262144
    [    0.000000] pcpu-alloc: s83072 r8192 d23424 u262144 alloc=1*2097152
    [    2.923992] rtl8192ce 0000:06:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
    [    2.924006] rtl8192ce 0000:06:00.0: setting latency timer to 64
    Network configuration:
    $ sudo lshw -C network
    Code:
      *-network               
           description: Wireless interface
           product: RTL8188CE 802.11b/g/n WiFi Adapter
           vendor: Realtek Semiconductor Co., Ltd.
           physical id: 0
           bus info: pci@0000:06:00.0
           logical name: wlan0
           version: 01
           serial: 7c:e9:d3:f3:b0:e7
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
           configuration: broadcast=yes driver=rtl8192ce driverversion=3.2.0-26-generic firmware=N/A ip=192.168.1.40 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
           resources: irq:17 ioport:3000(size=256) memory:f1d00000-f1d03fff
    Scan for networks:
    $ iwlist scan
    Code:
    wlan0     Scan completed :
              Cell 01 - Address: 00:19:CB:E7:09:C5
                        Channel:6
                        Frequency:2.437 GHz (Channel 6)
                        Quality=50/70  Signal level=-60 dBm  
                        Encryption key:off
                        ESSID:"Fullrate"
                        Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                        Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                                  36 Mb/s; 48 Mb/s; 54 Mb/s
                        Mode:Master
                        Extra:tsf=00000014db49d1b6
                        Extra: Last beacon: 12368ms ago
                        IE: Unknown: 000846756C6C72617465
                        IE: Unknown: 010582848B962C
                        IE: Unknown: 030106
                        IE: Unknown: 2A0100
                        IE: Unknown: 32080C1218243048606C

  2. #2
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    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Bump

  3. #3
    Join Date
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    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi, please copy and paste all commands and do the following:
    Code:
    gksudo gedit /etc/modprobe.d/rtl8192ce.conf
    A new empty file will open, paste this one line into the file.

    Code:
    options rtl8192ce swenc=1
    Proofread, save and close gedit.

    Set your wireless settings in network manager to match the screenshots.
    Reboot

    If still having issues post the output of:
    Code:
    nm-tool
    Thanks
    Last edited by Wild Man; February 10th, 2013 at 06:57 PM.

  4. #4
    Join Date
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    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi wildmanne39, thank you for helping.

    I recall reading a post where you suggested the same, and I ended up trying wicd which didn't change my situation. Ultimately I made a fresh Ubuntu install to revert any changes.

    I have added the line to rtl8192ce.conf and the issue persists.

    This is the output of nm-tool:

    Code:
    NetworkManager Tool
    
    State: connected (global)
    
    - Device: ttyACM0 --------------------------------------------------------------
      Type:              Mobile Broadband (GSM)
      Driver:            cdc_acm
      State:             disconnected
      Default:           no
    
      Capabilities:
    
    
    - Device: eth0 -----------------------------------------------------------------
      Type:              Wired
      Driver:            r8169
      State:             unavailable
      Default:           no
      HW Address:        F0:DE:F1:FF:17:1A
    
      Capabilities:
        Carrier Detect:  yes
    
      Wired Properties
        Carrier:         off
    
    
    - Device: wlan0  [Fullrate] ----------------------------------------------------
      Type:              802.11 WiFi
      Driver:            rtl8192ce
      State:             connected
      Default:           yes
      HW Address:        7C:E9:D3:F3:B0:E7
    
      Capabilities:
        Speed:           54 Mb/s
    
      Wireless Properties
        WEP Encryption:  yes
        WPA Encryption:  yes
        WPA2 Encryption: yes
    
      Wireless Access Points (* = current AP)
        *Fullrate:       Infra, 00:19:CB:E7:09:C5, Freq 2437 MHz, Rate 54 Mb/s, Strength 63
    
      IPv4 Settings:
        Address:         192.168.1.37
        Prefix:          24 (255.255.255.0)
        Gateway:         192.168.1.1
    
        DNS:             8.8.8.8
        DNS:             8.8.4.4
    
    
    - Device: usb0 -----------------------------------------------------------------
      Type:              Wired
      Driver:            cdc_ncm
      State:             unavailable
      Default:           no
      HW Address:        02:15:E0:EC:01:00
    
      Capabilities:
        Carrier Detect:  yes
    
      Wired Properties
        Carrier:         off

  5. #5
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    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi, post the output of:
    Code:
    Cat /sys/module/mac80211/parameters/ieee80211_default_rc_algo
    Thanks

  6. #6
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    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Output:
    Code:
    minstrel_ht

  7. #7
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    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi, post the contents of:
    Code:
    gksudo gedit /etc/modprobe.d/rtl8192ce.conf
    output of:
    Code:
    dmesg | grep 819
    what kind of router are you using is it real old?
    Thanks

  8. #8
    Join Date
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    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi!

    Contents of gksudo gedit /etc/modprobe.d/rtl8192ce.conf:
    Code:
    options rtl8192ce swenc=1
    $ dmesg | grep 819:
    Code:
    [    0.000000] PERCPU: Embedded 28 pages/cpu @ffff88011f200000 s83072 r8192 d23424 u262144
    [    0.000000] pcpu-alloc: s83072 r8192 d23424 u262144 alloc=1*2097152
    [    1.208194] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
    [    3.047890] rtl8192ce 0000:06:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
    [    3.047901] rtl8192ce 0000:06:00.0: setting latency timer to 64
    [    3.198190] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
    [    3.198193] cfg80211: 2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    [    3.198195] cfg80211: Updating information on frequency 2467 MHz for a 20 MHz width channel with regulatory rule:
    [    3.198198] cfg80211: 2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    [    3.246724] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin
    [    3.698441] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin
    [   27.830410] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin
    [   31.153593] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin
    Code:
    what kind of router are you using is it real old?
    It is quite old Unfortunately it's the only one I have available. It's a Zyxel P-2602HW-D1A.
    Before I installed Ubuntu on this laptop, Windows 7 had no problems keeping a stable connection. Thanks.

  9. #9
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    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hi, post the output of:
    Code:
    sudo cat /var/log/syslog | grep -e 819 -e firmware -e wpa -e etork wlan | tail -n55
    Also change your channel to 1 or 11 in the router.
    Thanks

  10. #10
    Join Date
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    Re: Thinkpad L430: Wifi rtl8188ce Unstable Connection

    Hey man, the command didn't work So I added -e in front of wlan and this is what came out (working on the channel shift):

    simon@sbl:~$ sudo cat /var/log/syslog | grep -e 819 -e firmware -e wpa -e etork -e wlan | tail -n55
    Code:
    Jul  6 21:13:28 sbl dhclient: receive_packet failed on wlan0: Network is down
    Jul  6 21:13:28 sbl NetworkManager[865]: <info> (wlan0): device state change: activated -> unavailable (reason 'none') [100 20 0]
    Jul  6 21:13:28 sbl NetworkManager[865]: <info> (wlan0): deactivating device (reason 'none') [0]
    Jul  6 21:13:28 sbl wpa_supplicant[1133]: Failed to initiate AP scan.
    Jul  6 21:13:28 sbl NetworkManager[865]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 1612
    Jul  6 21:13:28 sbl kernel: [  865.883437] ADDRCONF(NETDEV_UP): wlan0: link is not ready
    Jul  6 21:13:28 sbl NetworkManager[865]: <info> (wlan0): writing resolv.conf to /sbin/resolvconf
    Jul  6 21:13:33 sbl NetworkManager[865]: <info> (wlan0): bringing up device.
    Jul  6 21:13:33 sbl kernel: [  870.321762] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin
    Jul  6 21:13:33 sbl kernel: [  870.667396] ADDRCONF(NETDEV_UP): wlan0: link is not ready
    Jul  6 21:13:33 sbl NetworkManager[865]: <info> (wlan0): supplicant interface state: starting -> ready
    Jul  6 21:13:33 sbl NetworkManager[865]: <info> (wlan0): device state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42]
    Jul  6 21:13:33 sbl NetworkManager[865]: <info> (wlan0): supplicant interface state: ready -> inactive
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> Activation (wlan0) starting connection 'Fullrate'
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled...
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) started...
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled...
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 1 of 5 (Device Prepare) complete.
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) starting...
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> (wlan0): device state change: prepare -> config (reason 'none') [40 50 0]
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> Activation (wlan0/wireless): connection 'Fullrate' requires no security.  No secrets needed.
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 2 of 5 (Device Configure) complete.
    Jul  6 21:13:35 sbl NetworkManager[865]: <info> (wlan0): supplicant interface state: inactive -> scanning
    Jul  6 21:13:36 sbl wpa_supplicant[1133]: Trying to authenticate with 00:19:cb:e7:09:c5 (SSID='Fullrate' freq=2437 MHz)
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> (wlan0): supplicant interface state: scanning -> authenticating
    Jul  6 21:13:36 sbl wpa_supplicant[1133]: Trying to associate with 00:19:cb:e7:09:c5 (SSID='Fullrate' freq=2437 MHz)
    Jul  6 21:13:36 sbl kernel: [  873.323913] wlan0: authenticate with 00:19:cb:e7:09:c5 (try 1)
    Jul  6 21:13:36 sbl kernel: [  873.325420] wlan0: authenticated
    Jul  6 21:13:36 sbl wpa_supplicant[1133]: Associated with 00:19:cb:e7:09:c5
    Jul  6 21:13:36 sbl wpa_supplicant[1133]: CTRL-EVENT-CONNECTED - Connection to 00:19:cb:e7:09:c5 completed (auth) [id=0 id_str=]
    Jul  6 21:13:36 sbl kernel: [  873.325622] wlan0: associate with 00:19:cb:e7:09:c5 (try 1)
    Jul  6 21:13:36 sbl kernel: [  873.327692] wlan0: RX AssocResp from 00:19:cb:e7:09:c5 (capab=0x461 status=0 aid=2)
    Jul  6 21:13:36 sbl kernel: [  873.327698] wlan0: associated
    Jul  6 21:13:36 sbl kernel: [  873.328667] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> (wlan0): supplicant interface state: authenticating -> completed
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> Activation (wlan0/wireless) Stage 2 of 5 (Device Configure) successful.  Connected to wireless network 'Fullrate'.
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) scheduled.
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) started...
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> (wlan0): device state change: config -> ip-config (reason 'none') [50 70 0]
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> Activation (wlan0) Beginning DHCPv4 transaction (timeout in 45 seconds)
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) complete.
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> (wlan0): DHCPv4 state changed nbi -> preinit
    Jul  6 21:13:36 sbl dhclient: Listening on LPF/wlan0/7c:e9:d3:f3:b0:e7
    Jul  6 21:13:36 sbl dhclient: Sending on   LPF/wlan0/7c:e9:d3:f3:b0:e7
    Jul  6 21:13:36 sbl dhclient: DHCPREQUEST of 192.168.1.37 on wlan0 to 255.255.255.255 port 67
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> (wlan0): DHCPv4 state changed preinit -> reboot
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Configure Commit) scheduled...
    Jul  6 21:13:36 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Commit) started...
    Jul  6 21:13:37 sbl NetworkManager[865]: <info> (wlan0): writing resolv.conf to /sbin/resolvconf
    Jul  6 21:13:37 sbl NetworkManager[865]: <info> (wlan0): device state change: ip-config -> activated (reason 'none') [70 100 0]
    Jul  6 21:13:37 sbl NetworkManager[865]: <info> Policy set 'Fullrate' (wlan0) as default for IPv4 routing and DNS.
    Jul  6 21:13:37 sbl NetworkManager[865]: <info> Activation (wlan0) successful, device activated.
    Jul  6 21:13:37 sbl NetworkManager[865]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Commit) complete.
    Jul  6 21:13:46 sbl kernel: [  883.540620] wlan0: no IPv6 routers present

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