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Thread: Incosistant WiFi Speeds on Lenovo Thinkpad T430s

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  1. #1
    Join Date
    Aug 2010
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    5

    Question Incosistant WiFi Speeds on Lenovo Thinkpad T430s

    I have a Lenovo Thinkpad T430s running Ubuntu 13.04 (technically, I'm running Linux Mint 15 but it's based off Ubuntu 13.04) and have been having serious issues with my wireless internet. While in Firefox or Minecraft, the wifi speed often drops or fails completely randomly despite the signal strength staying the same and others in the house reporting no issues. I've already tried disabling N and reverting to G but that only seemed to work for a short while. Please help!

    P.S. If I can get this working again, I would also like to revert back to N.

  2. #2
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    5,704
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: Incosistant WiFi Speeds on Lenovo Thinkpad T430s

    Please show the outputs of these commands:
    Code:
    lspci -nnk | grep -iA2 net
    lsusb
    lsmod
    iwconfig
    iwlist chan
    ifconfig -a
    sudo iwlist scan

  3. #3
    Join Date
    Aug 2010
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    5

    Re: Incosistant WiFi Speeds on Lenovo Thinkpad T430s

    1.
    Code:
    00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit Network Connection [8086:1502] (rev 04)
        Subsystem: Lenovo Device [17aa:21f3]
        Kernel driver in use: e1000e
    --
    03:00.0 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
    2.
    Code:
    Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
    Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
    Bus 003 Device 006: ID 045e:00e1 Microsoft Corp. Wireless Laser Mouse 6000 Reciever
    Bus 003 Device 005: ID 04d9:2323 Holtek Semiconductor, Inc. 
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
    Bus 001 Device 003: ID 5986:02d5 Acer, Inc 
    Bus 002 Device 009: ID 17ef:100a Lenovo ThinkPad Mini Dock Plus Series 3
    Bus 002 Device 011: ID 046d:0802 Logitech, Inc. Webcam C200
    Bus 002 Device 010: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
    3.
    Code:
    Module                  Size  Used by
    parport_pc             28152  0 
    bnep                   18036  2 
    rfcomm                 42641  0 
    ppdev                  17073  0 
    bluetooth             228619  10 bnep,rfcomm
    binfmt_misc            17500  1 
    arc4                   12615  2 
    ext2                   72837  1 
    rtl8192ce              53594  0 
    rtlwifi                79673  1 rtl8192ce
    rtl8192c_common        48779  1 rtl8192ce
    mac80211              606457  3 rtlwifi,rtl8192c_common,rtl8192ce
    uvcvideo               80847  0 
    videobuf2_vmalloc      13056  1 uvcvideo
    videobuf2_memops       13202  1 videobuf2_vmalloc
    videobuf2_core         40513  1 uvcvideo
    joydev                 17377  0 
    videodev              129260  2 uvcvideo,videobuf2_core
    cfg80211              510937  2 mac80211,rtlwifi
    snd_usb_audio         140685  1 
    snd_usbmidi_lib        24938  1 snd_usb_audio
    coretemp               13355  0 
    snd_hda_codec_hdmi     36913  1 
    snd_hda_codec_realtek    78399  1 
    kvm                   443165  0 
    snd_hda_intel          39619  5 
    snd_hda_codec         136453  3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
    snd_hwdep              13602  2 snd_usb_audio,snd_hda_codec
    snd_pcm                97451  5 snd_usb_audio,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
    snd_page_alloc         18710  2 snd_pcm,snd_hda_intel
    thinkpad_acpi          81222  0 
    dm_multipath           22843  0 
    ghash_clmulni_intel    13259  0 
    nvram                  14362  1 thinkpad_acpi
    scsi_dh                14843  1 dm_multipath
    psmouse                95870  0 
    aesni_intel            55399  2 
    aes_x86_64             17255  1 aesni_intel
    xts                    12885  1 aesni_intel
    snd_seq_midi           13324  0 
    snd_seq_midi_event     14899  1 snd_seq_midi
    snd_rawmidi            30180  2 snd_usbmidi_lib,snd_seq_midi
    lrw                    13257  1 aesni_intel
    gf128mul               14951  2 lrw,xts
    snd_seq                61554  2 snd_seq_midi_event,snd_seq_midi
    mei                    41158  0 
    ablk_helper            13597  1 aesni_intel
    snd_seq_device         14497  3 snd_seq,snd_rawmidi,snd_seq_midi
    snd_timer              29425  2 snd_pcm,snd_seq
    lpc_ich                17061  0 
    cryptd                 20373  3 ghash_clmulni_intel,aesni_intel,ablk_helper
    serio_raw              13215  0 
    microcode              22881  0 
    snd                     68876  24  snd_hda_codec_realtek,snd_usb_audio,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,thinkpad_acpi,snd_seq_device
    tpm_tis                18675  0 
    soundcore              12680  1 snd
    mac_hid                13205  0 
    lp                     17759  0 
    parport                46345  3 lp,ppdev,parport_pc
    btrfs                 785967  0 
    zlib_deflate           26885  1 btrfs
    libcrc32c              12615  1 btrfs
    dm_raid45              76725  0 
    xor                    17116  1 dm_raid45
    dm_mirror              21946  0 
    dm_region_hash         20820  1 dm_mirror
    dm_log                 18529  3 dm_region_hash,dm_mirror,dm_raid45
    hid_generic            12540  0 
    usbhid                 47074  0 
    hid                   101002  2 hid_generic,usbhid
    nouveau               939088  0 
    i915                  600351  3 
    ahci                   25731  4 
    libahci                31364  1 ahci
    mxm_wmi                13021  1 nouveau
    wmi                    19070  2 mxm_wmi,nouveau
    video                  19390  2 i915,nouveau
    i2c_algo_bit           13413  2 i915,nouveau
    ttm                    83187  1 nouveau
    drm_kms_helper         49394  2 i915,nouveau
    drm                   286313  6 ttm,i915,drm_kms_helper,nouveau
    e1000e                198787  0
    4.
    Code:
    eth0      no wireless extensions.
    
    lo        no wireless extensions.
    
    wlan0     IEEE 802.11bgn  ESSID:"saunders"  
              Mode:Managed  Frequency:2.437 GHz  Access Point: 00:1D:D0:DA:FE:40   
              Bit Rate=72.2 Mb/s   Tx-Power=20 dBm   
              Retry  long limit:7   RTS thr=2347 B   Fragment thr:off
              Power Management:off
              Link Quality=58/70  Signal level=-52 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:4   Missed beacon:0
    5.
    Code:
    eth0      no frequency information.
    
    lo        no frequency information.
    
    wlan0     11 channels in total; available frequencies :
              Channel 01 : 2.412 GHz
              Channel 02 : 2.417 GHz
              Channel 03 : 2.422 GHz
              Channel 04 : 2.427 GHz
              Channel 05 : 2.432 GHz
              Channel 06 : 2.437 GHz
              Channel 07 : 2.442 GHz
              Channel 08 : 2.447 GHz
              Channel 09 : 2.452 GHz
              Channel 10 : 2.457 GHz
              Channel 11 : 2.462 GHz
              Current Frequency:2.437 GHz (Channel 6)
    6.
    Code:
    eth0      Link encap:Ethernet  HWaddr 3c:97:0e:98:e1:db  
              UP BROADCAST MULTICAST  MTU:1500  Metric:1
              RX packets:0 errors:0 dropped:0 overruns:0 frame:0
              TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
              Interrupt:20 Memory:f3500000-f3520000 
    
    lo        Link encap:Local Loopback  
              inet addr:127.0.0.1  Mask:255.0.0.0
              inet6 addr: ::1/128 Scope:Host
              UP LOOPBACK RUNNING  MTU:65536  Metric:1
              RX packets:3466 errors:0 dropped:0 overruns:0 frame:0
              TX packets:3466 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:343049 (343.0 KB)  TX bytes:343049 (343.0 KB)
    
    wlan0     Link encap:Ethernet  HWaddr a4:17:31:f9:fe:ee  
              inet addr:192.168.0.4  Bcast:192.168.0.255  Mask:255.255.255.0
              inet6 addr: fe80::a617:31ff:fef9:feee/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:1419058 errors:0 dropped:0 overruns:0 frame:0
              TX packets:783413 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:1132568486 (1.1 GB)  TX bytes:75420733 (75.4 MB)
    7.
    Code:
    eth0      Interface doesn't support scanning.
    
    lo        Interface doesn't support scanning.
    
    wlan0     Scan completed :
              Cell 01 - Address: 00:1D:D0:DA:FE:40
                        Channel:6
                        Frequency:2.437 GHz (Channel 6)
                        Quality=57/70  Signal level=-53 dBm  
                        Encryption key:on
                        ESSID:"saunders"
                        Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                                  18 Mb/s; 36 Mb/s; 54 Mb/s
                        Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                        Mode:Master
                        Extra:tsf=0000007bbcd69ddf
                        Extra: Last beacon: 88ms ago
                        IE: Unknown: 00087361756E64657273
                        IE: Unknown: 010882848B961224486C
                        IE: Unknown: 030106
                        IE: Unknown: 2A0104
                        IE: Unknown: 32040C183060
                        IE: Unknown: 2D1A6C0017FFFF0000000000000000000000000000000C0000000000
                        IE: Unknown: 3D1606000400000000000000000000000000000000000000
                        IE: Unknown: 3E0100
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
                        IE: Unknown: 0B05080028127A
                        IE: Unknown: 7F0101
                        IE: Unknown: DD07000C4307000000
                        IE: Unknown: 0706555320010B10
                         IE: Unknown:  DD7D0050F204104A0001101044000102103B000103104700102880288028801880A880001DD0DAFE4010210005415252495310230006544738363247102400065254323836301042000831323334353637381054000800060050F204000110110012415252495320544738363220526F75746572100800020084103C000101
              Cell 02 - Address: 9C:D3:6D:B0:10:9A
                        Channel:6
                        Frequency:2.437 GHz (Channel 6)
                        Quality=55/70  Signal level=-55 dBm  
                        Encryption key:on
                        ESSID:"33liverpool"
                        Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                                  24 Mb/s; 36 Mb/s; 54 Mb/s
                        Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                        Mode:Master
                        Extra:tsf=000000bcf1a10183
                        Extra: Last beacon: 820ms ago
                        IE: Unknown: 000B33336C69766572706F6F6C
                        IE: Unknown: 010882840B162430486C
                        IE: Unknown: 030106
                        IE: Unknown: 050401020000
                        IE: Unknown: 2A0102
                        IE: Unknown: 2F0102
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: 32040C121860
                        IE: Unknown: 2D1A6C181BFF00000000000000000000000000000000000000000000
                        IE: Unknown: 3D1606001300000000000000000000000000000000000000
                        IE: Unknown: 4A0E14000A002C01C800140005001900
                        IE: Unknown: 7F0101
                        IE: Unknown: DD0E0050F204104A0001101044000102
                        IE: Unknown: DD090010180201F0050000
                        IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
                        IE: Unknown: DD1E00904C336C181BFF00000000000000000000000000000000000000000000
                        IE: Unknown: DD1A00904C3406001300000000000000000000000000000000000000
              Cell 03 - Address: 00:0D:67:2C:46:14
                        Channel:1
                        Frequency:2.412 GHz (Channel 1)
                        Quality=55/70  Signal level=-55 dBm  
                        Encryption key:on
                        ESSID:""
                        Bit Rates:5.5 Mb/s; 11 Mb/s; 6 Mb/s; 9 Mb/s; 12 Mb/s
                                  18 Mb/s; 24 Mb/s; 36 Mb/s
                        Bit Rates:48 Mb/s; 54 Mb/s
                        Mode:Master
                        Extra:tsf=0000007bb7fc2180
                        Extra: Last beacon: 764ms ago
                        IE: Unknown: 0000
                        IE: Unknown: 01088B960C1218243048
                        IE: Unknown: 030101
                        IE: Unknown: 050400010000
                        IE: Unknown: 070655534F010D1E
                        IE: Unknown: 200100
                        IE: Unknown: 2A0100
                        IE: Unknown: 3202606C
                        IE: Unknown: 2D1AAD0103FFE0E000000000000000000000000000000406E6E70D00
                        IE: Unknown: 3D1601001500000000000000000000000000000000000000
                        IE: Unknown: 4A0E14000A002C01C800140005001900
                        IE: Unknown: 7F0101
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DD180050F2020101060003A4000027A4000042435E0062322F00
                        IE: Unknown: DD0900037F01010000FF7F
              Cell 04 - Address: 00:1D:D6:40:76:B0
                        Channel:6
                        Frequency:2.437 GHz (Channel 6)
                        Quality=56/70  Signal level=-54 dBm  
                        Encryption key:on
                        ESSID:"Wilker"
                        Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                                  18 Mb/s; 36 Mb/s; 54 Mb/s
                        Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                        Mode:Master
                        Extra:tsf=000000c0eacac147
                        Extra: Last beacon: 488ms ago
                        IE: Unknown: 000657696C6B6572
                        IE: Unknown: 010882848B961224486C
                        IE: Unknown: 030106
                        IE: Unknown: 32040C183060
                        IE: Unknown: 070C55532001010F0209110B010F
                        IE: Unknown: 33082001020304050607
                        IE: Unknown: 33082105060708090A0B
                        IE: Unknown: DD270050F204104A0001101044000102104700102880288028801880A880001DD64076B0103C000101
                        IE: Unknown: 050400010000
                        IE: Unknown: 2A0106
                        IE: Unknown: 2D1A6C0017FFFF0000000000000000000000000000000C0000000000
                        IE: Unknown: 3D1606030500000000000000000000000000000000000000
                        IE: Unknown: 7F0101
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : TKIP CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
                        IE: Unknown: 0B05010036127A
                        IE: Unknown: DD07000C4307000000
              Cell 05 - Address: 94:CC:B9:BB:9B:F0
                        Channel:6
                        Frequency:2.437 GHz (Channel 6)
                        Quality=57/70  Signal level=-53 dBm  
                        Encryption key:on
                        ESSID:"ATT344"
                        Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                                  24 Mb/s; 36 Mb/s; 54 Mb/s
                        Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                        Mode:Master
                        Extra:tsf=00000060927ab183
                        Extra: Last beacon: 360ms ago
                        IE: Unknown: 0006415454333434
                        IE: Unknown: 010882848B962430486C
                        IE: Unknown: 030106
                        IE: Unknown: 050400030000
                        IE: Unknown: 2A0102
                        IE: Unknown: 2F0102
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : CCMP TKIP
                            Authentication Suites (1) : PSK
                        IE: Unknown: 32040C121860
                        IE: Unknown: 2D1A7C181BFFFF000000000000000000000000000000000000000000
                        IE: Unknown: 3D1606001700000000000000000000000000000000000000
                        IE: Unknown: 4A0E14000A002C01C800140005001900
                        IE: Unknown: 7F0101
                        IE: Unknown: DD090010180201F02C0000
                        IE: WPA Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : CCMP TKIP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
              Cell 06 - Address: 00:13:D4:D6:0C:06
                        Channel:11
                        Frequency:2.462 GHz (Channel 11)
                        Quality=58/70  Signal level=-52 dBm  
                        Encryption key:on
                        ESSID:"Wireless"
                        Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                                  24 Mb/s; 36 Mb/s; 54 Mb/s
                        Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                        Mode:Master
                        Extra:tsf=00000068afa45d66
                        Extra: Last beacon: 88ms ago
                        IE: Unknown: 0008576972656C657373
                        IE: Unknown: 010882848B962430486C
                        IE: Unknown: 03010B
                        IE: Unknown: 2A0100
                        IE: Unknown: 2F0100
                        IE: Unknown: 32040C121860
                        IE: Unknown: DD06001018020000
    Last edited by zaza224; July 12th, 2013 at 12:22 AM. Reason: added code tags

  4. #4
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    14,820
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Incosistant WiFi Speeds on Lenovo Thinkpad T430s

    Please use code tags - if you are using New Reply button - highlight text and use the # button in the text box header.

    If using Quick Reply then [code] at the beginning and [/code] at the end.

  5. #5
    Join Date
    Feb 2007
    Location
    West Hills CA
    Beans
    8,507
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Re: Incosistant WiFi Speeds on Lenovo Thinkpad T430s

    I don't see anything amiss with your log files. I would try a wired connection for a while and see if you notice any slowdowns. It could be some background processes that are eating up CPU time and tying up the data bus. This would appear to be network slow-downs, but are really CPU/IO WAIT issues. Once you have done that then look at your log files in /var/log and see if there are any errors that are recurring.

    I would suspect wireless interference. You have no RX/TX errors in over 1 GB of data transfer, so I assume that your wireless antenna and chipset are working OK. Channel 6 is in the middle of the band. Try setting your router to Channel 1 or 11 or auto and see if you have better throughput. How many wireless networks show up when you press on the Antenna icon?
    -------------------------------------
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    Unumquodque potest reparantur. Patientia sit virtus.

  6. #6
    Join Date
    Aug 2010
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    5

    Re: Incosistant WiFi Speeds on Lenovo Thinkpad T430s

    How many wireless networks show up when you press on the Antenna icon?
    About 5.

  7. #7
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    5,704
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: Incosistant WiFi Speeds on Lenovo Thinkpad T430s

    This driver need additional options:
    Code:
    echo "options rtl8192ce swlps=0 ips=0" | sudo tee /etc/modprobe.d/rtl8192ce.conf
    sudo modprobe -rfv rtl8192ce
    sudo modprobe -v rtl8192ce

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