Page 1 of 2 12 LastLast
Results 1 to 10 of 19

Thread: edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

  1. #1
    Join Date
    May 2010
    Beans
    15

    edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

    Hi all

    This is my 3rd edimax ew7811un - son keeps standing on it - and this one is causing me a headache.
    The speed is a 1/10th of what it should be, it's not faulty as I have tested it on another OS.
    I use the realtek drivers from their site and have never had a problem with this model before.

    I initially thought it was the power saving mode as dmesg kept bring it up but even after turning it off it is still performing the same.
    * see below on howto turn powersaving off.

    iwconfig wlan0
    Code:
    wlan0     IEEE 802.11bgn  ESSID:"not for nosey people"  Nickname:"<WIFI@REALTEK>"
              Mode:Managed  Frequency:2.462 GHz  Access Point: A4:B1:E9:00:7F:3B   
              Bit Rate:65 Mb/s   Sensitivity:0/0  
              Retry:off   RTS thr:off   Fragment thr:off
              Power Management:off
              Link Quality=98/100  Signal level=57/100  Noise level=0/100
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:0   Missed beacon:0
    ifconfig
    Code:
    wlan0     Link encap:Ethernet  HWaddr no:t-:fo:r-:no:se:y  
              inet addr:192.168.1.67  Bcast:192.168.1.255  Mask:255.255.255.0
              inet6 addr: fe80::821f:2ff:feaf:1791/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:11734 errors:0 dropped:12891 overruns:0 frame:0
              TX packets:10336 errors:0 dropped:1 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:12291251 (12.2 MB)  TX bytes:1733846 (1.7 MB)
    lsusb
    Code:
    Bus 002 Device 003: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]
    dmesg
    Code:
    [ 2770.852758] rtl8192c_dm_RF_Saving(): RF_Save
    [ 2800.911870] rtl8192c_dm_RF_Saving(): RF_Normal
    [ 2806.924889] rtl8192c_dm_RF_Saving(): RF_Save
    [ 2830.971876] rtl8192c_dm_RF_Saving(): RF_Normal

    *
    If you want to turn power saving off from the official Realtek drivers follow this using GUI desktop unless stated.
    - download driver from realtek
    - uncompress to any location - I have a Drivers folder in my home for this, but doesn't matter if you put it on desktop.
    - go into "RTL8188C_8192C_USB_linux_v3.4.4_4749.20121105 " or what ever your version is
    - go into "Driver"
    - double click the tar file but don't extract
    - find the "Makefile" in the extraction program window and open in a text editor
    find and change this
    Code:
    CONFIG_POWER_SAVING            =    y
    to
    Code:
    CONFIG_POWER_SAVING            =    n
    save and close and it will auto save the changes back into the tar file.
    - go into the terminal and type
    Code:
    ~/Drivers/RTL8188C_8192C_USB_linux_v3.4.4_4749.20121105$ sudo -i
    ~/Drivers/RTL8188C_8192C_USB_linux_v3.4.4_4749.20121105$ sh install.sh
    done

    Anyway hope someone can help shed light on why my link speed is being retarded.

    Cheers
    Last edited by sh2515; October 13th, 2013 at 04:43 PM.

  2. #2
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    15,065
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

    Hi, copy and paste this command in the terminal (ctrl+alt+t) please:
    Code:
     wget -N -t 5 -T 10 http://dl.dropbox.com/u/57264241/wireless_script && chmod +x wireless_script && ./wireless_script
    It will download a script and create a file named (wireless-info.txt, or wireless-info.txt.tar.gz) in your home folder with wireless information so we can see the condition of your wireless at this time and the Mac address, WPA key and WEP key are removed for your security, then reply back, click on the paper clip and attach the wireless-info.tar.gz file as a zip file.

    If you do not have ethernet either then follow the directions at this link for running the script without internet.
    http://ubuntuforums.org/showpost.php?p=12350385
    Thanks

  3. #3
    Join Date
    May 2010
    Beans
    15

    Re: edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

    Thank you for taking the time to help me. I have run the script and here is the file.wireless-info.txt

  4. #4
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    15,065
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

    Please try:
    Code:
    sudo modprobe -rv rtl8192cu
    sudo modprobe -v 8192cu
    watch for errors.
    Thanks

  5. #5
    Join Date
    May 2010
    Beans
    15

    Re: edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

    Thanks for the help. I used both commands and they returned no errors. The speed is still same slow speed.

  6. #6
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    15,065
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

    Please post the output of:
    Code:
    lsmod
    so we can see if it is now using the driver you compiled.
    Thanks

  7. #7
    Join Date
    May 2010
    Beans
    15

    Re: edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

    lsmod
    Code:
    Module                  Size  Used by
    ip6table_filter        12711  0 
    ip6_tables             18432  1 ip6table_filter
    ebtable_nat            12695  0 
    ebtables               21508  1 ebtable_nat
    xt_state               12514  1 
    ipt_REJECT             12512  2 
    xt_CHECKSUM            12493  1 
    iptable_mangle         12646  1 
    xt_tcpudp              12531  5 
    iptable_filter         12706  1 
    ipt_MASQUERADE         12663  4 
    iptable_nat            13016  1 
    nf_nat                 24959  2 ipt_MASQUERADE,iptable_nat
    nf_conntrack_ipv4      19084  4 iptable_nat,nf_nat
    nf_conntrack           73847  5 xt_state,ipt_MASQUERADE,iptable_nat,nf_nat,nf_conntrack_ipv4
    nf_defrag_ipv4         12649  1 nf_conntrack_ipv4
    ip_tables              18106  3 iptable_mangle,iptable_filter,iptable_nat
    x_tables               22011  12 ip6table_filter,ip6_tables,ebtables,xt_state,ipt_REJECT,xt_CHECKSUM,iptable_mangle,xt_tcpudp,iptable_filter,ipt_MASQUERADE,iptable_nat,ip_tables
    bridge                 79601  0 
    stp                    12848  1 bridge
    rfcomm                 38139  0 
    parport_pc             32114  0 
    ppdev                  12849  0 
    bnep                   17830  2 
    binfmt_misc            17292  1 
    joydev                 17393  0 
    btusb                  17948  1 
    nfsd                  229909  2 
    nfs                   372273  1 
    lockd                  78865  2 nfsd,nfs
    fscache                50642  1 nfs
    auth_rpcgss            39597  2 nfsd,nfs
    nfs_acl                12771  2 nfsd,nfs
    sunrpc                215112  12 nfsd,nfs,lockd,auth_rpcgss,nfs_acl
    snd_hda_codec_conexant    52521  1 
    snd_hda_intel          32719  2 
    snd_hda_codec         109562  2 snd_hda_codec_conexant,snd_hda_intel
    snd_hwdep              13276  1 snd_hda_codec
    8192cu                502561  0 
    ath3k                  12825  0 
    bluetooth             158447  14 rfcomm,bnep,btusb,ath3k
    uvcvideo               67203  0 
    snd_pcm                80916  2 snd_hda_intel,snd_hda_codec
    videodev               86588  1 uvcvideo
    snd_seq_midi           13132  0 
    snd_rawmidi            25424  1 snd_seq_midi
    psmouse                86546  0 
    snd_seq_midi_event     14475  1 snd_seq_midi
    snd_seq                51592  2 snd_seq_midi,snd_seq_midi_event
    snd_timer              28931  2 snd_pcm,snd_seq
    i915                  428056  3 
    snd_seq_device         14172  3 snd_seq_midi,snd_rawmidi,snd_seq
    serio_raw              13027  0 
    snd                    62218  13 snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
    drm_kms_helper         45466  1 i915
    drm                   197641  4 i915,drm_kms_helper
    soundcore              14635  1 snd
    snd_page_alloc         14108  2 snd_hda_intel,snd_pcm
    i2c_algo_bit           13199  1 i915
    ideapad_laptop         17890  0 
    sparse_keymap          13658  1 ideapad_laptop
    video                  19115  1 i915
    mac_hid                13077  0 
    lp                     17455  0 
    parport                40930  3 parport_pc,ppdev,lp
    r8169                  56396  0

  8. #8
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    15,065
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

    Please post the output of:
    Code:
    modinfo 8192cu
    Thanks

  9. #9
    Join Date
    May 2010
    Beans
    15

    Re: edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

    modinfo
    Code:
    filename:       /lib/modules/3.2.0-54-generic-pae/kernel/drivers/net/wireless/8192cu.ko
    version:        v3.4.4_4749.20121105
    author:         Realtek Semiconductor Corp.
    description:    Realtek Wireless Lan Driver
    license:        GPL
    srcversion:     657E53E8FE213B566819C54
    alias:          usb:v0BDAp8186d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0E66p0019d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0846p9021d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0B05p17ABd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0DF6p0061d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v20F4p624Dd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v050Dp2103d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v050Dp2102d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2001p3307d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v4855p0091d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v07AAp0056d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v07B8p8178d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2019pAB2Bd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v7392p7822d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0586p341Fd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2001p3309d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2001p330Ad*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2001p3307d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2019p1201d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v04F2pAFFCd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v04F2pAFFBd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v04F2pAFF8d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v04F2pAFFAd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v04F2pAFF9d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v04F2pAFF7d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v13D3p3358d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v13D3p3359d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp317Fd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2019pAB2Ed*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2019p4902d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v4856p0091d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp5088d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0DF6p005Cd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v13D3p3357d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v4855p0090d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v20F4p648Bd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2019pAB2Ad*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v050Dp1102d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2001p3308d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v103Cp1629d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v06F8pE033d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0EB0p9071d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v07B8p8189d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v7392p7811d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0DF6p0052d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v2019pED17d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp817Cd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp8178d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp8177d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp018Ad*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp818Ad*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp817Fd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp8754d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp817Dd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp817Bd*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp817Ad*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp817Ed*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp8170d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp8176d*dc*dsc*dp*ic*isc*ip*
    alias:          usb:v0BDAp8191d*dc*dsc*dp*ic*isc*ip*
    depends:        
    vermagic:       3.2.0-54-generic-pae SMP mod_unload modversions 686 
    parm:           rtw_ips_mode:The default IPS mode (int)
    parm:           ifname:charp
    parm:           rtw_initmac:charp
    parm:           rtw_channel_plan:int
    parm:           rtw_chip_version:int
    parm:           rtw_rfintfs:int
    parm:           rtw_lbkmode:int
    parm:           rtw_network_mode:int
    parm:           rtw_channel:int
    parm:           rtw_mp_mode:int
    parm:           rtw_wmm_enable:int
    parm:           rtw_vrtl_carrier_sense:int
    parm:           rtw_vcs_type:int
    parm:           rtw_busy_thresh:int
    parm:           rtw_ht_enable:int
    parm:           rtw_cbw40_enable:int
    parm:           rtw_ampdu_enable:int
    parm:           rtw_rx_stbc:int
    parm:           rtw_ampdu_amsdu:int
    parm:           rtw_lowrate_two_xmit:int
    parm:           rtw_rf_config:int
    parm:           rtw_power_mgnt:int
    parm:           rtw_low_power:int
    parm:           rtw_wifi_spec:int
    parm:           rtw_antdiv_cfg:int
    parm:           rtw_enusbss:int
    parm:           rtw_hwpdn_mode:int
    parm:           rtw_hwpwrp_detect:int
    parm:           rtw_max_roaming_times:The max roaming times to try (uint)
    parm:           rtw_force_iol:Force to enable IOL (bool)
    parm:           rtw_intel_class_mode:The intel class mode [0: off, 1: on] (uint)
    parm:           rtw_mc2u_disable:int

  10. #10
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    15,065
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: edimax ew7811un - rtl8188cus, 12.04LTS 32bit kernel 3.2.0-54-generic-pae

    Please change the encryption in your router to just wpa2 AES if you have that option then set your wireless settings to match the screenshots.
    If it is still slow post a new wireless file so we can see if the changes stuck and what difference they made.
    You need to unplug your usb ethernet to test the wireless connection otherwise your wireless will be overridden by the usb ethernet.
    Thanks
    Attached Images Attached Images

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •