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Thread: Realtek RTL8191SEvB, slow wifi on Ubuntu 12.04

  1. #31
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    14,845
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: slow wifi on Ubuntu 12.04

    Hi, please remove the netinfo.txt file from your home folder and run the script again and post the outcome so we can see what has changed.
    Thanks

  2. #32
    Join Date
    Mar 2013
    Beans
    21

    Re: slow wifi on Ubuntu 12.04

    hi wild man, thanks for the response. here is the new file content:

    Code:
    *************** info trace ****************
    
    
    
    **** uname -a ****
    
    
    Linux ubuntu 3.2.0-39-generic #62-Ubuntu SMP Thu Feb 28 00:28:53 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
    
    
    **** lsb-release ****
    
    
    DISTRIB_ID=Ubuntu
    DISTRIB_RELEASE=12.04
    DISTRIB_CODENAME=precise
    DISTRIB_DESCRIPTION="Ubuntu 12.04.2 LTS"
    
    
    **** lspci ****
    
    
    00:0a.0 Ethernet controller [0200]: NVIDIA Corporation MCP79 Ethernet [10de:0ab0] (rev b1)
        Subsystem: Mitac Device [1071:9072]
        Kernel driver in use: forcedeth
    --
    06:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8191SEvB Wireless LAN Controller [10ec:8172] (rev 10)
        Subsystem: Realtek Semiconductor Co., Ltd. RTL8191SEvB Wireless LAN Controller [10ec:8172]
        Kernel modules: rtl8192se
    
    
    **** lsusb ****
    
    
    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:0001 Linux Foundation 1.1 root hub
    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 002 Device 002: ID 05e3:0505 Genesys Logic, Inc. 
    Bus 003 Device 002: ID 24ae:2000  
    
    
    **** iwconfig ****
    
    
    
    
    **** rfkill ****
    
    
    
    
    **** lsmod ****
    
    
    Module                  Size  Used by
    vesafb                 13844  1 
    snd_hda_codec_hdmi     32474  1 
    snd_hda_codec_realtek   224173  1 
    snd_hda_intel          33719  3 
    snd_hda_codec         127706  3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
    snd_hwdep              17764  1 snd_hda_codec
    snd_pcm                97275  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
    snd_seq_midi           13324  0 
    snd_rawmidi            30748  1 snd_seq_midi
    joydev                 17693  0 
    snd_seq_midi_event     14899  1 snd_seq_midi
    snd_seq                61929  2 snd_seq_midi,snd_seq_midi_event
    snd_timer              29990  2 snd_pcm,snd_seq
    snd_seq_device         14540  3 snd_seq_midi,snd_rawmidi,snd_seq
    nvidia              12319264  60 
    snd                    79041  16 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
    rtlwifi               111245  0 
    mac80211              506862  1 rtlwifi
    psmouse                97485  0 
    uvcvideo               72627  0 
    videodev               98259  1 uvcvideo
    cfg80211              205774  2 rtlwifi,mac80211
    soundcore              15091  1 snd
    serio_raw              13211  0 
    usbhid                 47238  0 
    v4l2_compat_ioctl32    17128  1 videodev
    shpchp                 37201  0 
    snd_page_alloc         18529  2 snd_hda_intel,snd_pcm
    hid                    99636  1 usbhid
    i2c_nforce2            13058  0 
    video                  19651  0 
    parport_pc             32866  0 
    ppdev                  17113  0 
    rfcomm                 47604  0 
    lp                     17799  0 
    parport                46562  3 parport_pc,ppdev,lp
    bnep                   18281  2 
    bluetooth             180153  10 rfcomm,bnep
    binfmt_misc            17540  1 
    mac_hid                13253  0 
    ums_realtek            18248  0 
    usb_storage            49243  1 ums_realtek
    forcedeth              63460  0 
    
    
    **** nm-tool ****
    
    
    
    NetworkManager Tool
    
    State: connected (global)
    
    - Device: eth0  [Wired connection 1] -------------------------------------------
      Type:              Wired
      Driver:            forcedeth
      State:             connected
      Default:           yes
      HW Address:        <MAC address removed>
    
      Capabilities:
        Carrier Detect:  yes
        Speed:           100 Mb/s
    
      Wired Properties
        Carrier:         on
    
      IPv4 Settings:
        Address:         192.168.1.221
        Prefix:          24 (255.255.255.0)
        Gateway:         192.168.1.1
    
        DNS:             192.168.1.1
    
    
    
    
    **** NetworkManager.state ****
    
    
    
    [main]
    NetworkingEnabled=true
    WirelessEnabled=true
    WWANEnabled=true
    WimaxEnabled=true
    
    
    **** NetworkManager.conf ****
    
    
    [main]
    plugins=ifupdown,keyfile
    dns=dnsmasq
    
    [ifupdown]
    managed=false
    
    
    **** NetworkManager.conf-10.04 ****
    
    
    
    
    **** interfaces ****
    
    
    # interfaces(5) file used by ifup(8) and ifdown(8)
    auto lo
    iface lo inet loopback
    
    
    **** iwlist ****
    
    
    
    
    **** resolv ****
    
    
    # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
    #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
    nameserver 127.0.0.1
    search localdomain
    
    
    **** blacklist.conf ****
    
    
    # This file lists those modules which we don't want to be loaded by
    # alias expansion, usually so some other driver will be loaded for the
    # device instead.
    
    # evbug is a debug tool that should be loaded explicitly
    blacklist evbug
    
    # these drivers are very simple, the HID drivers are usually preferred
    blacklist usbmouse
    blacklist usbkbd
    
    # replaced by e100
    blacklist eepro100
    
    # replaced by tulip
    blacklist de4x5
    
    # causes no end of confusion by creating unexpected network interfaces
    blacklist eth1394
    
    # snd_intel8x0m can interfere with snd_intel8x0, doesn't seem to support much
    # hardware on its own (Ubuntu bug #2011, #6810)
    blacklist snd_intel8x0m
    
    # Conflicts with dvb driver (which is better for handling this device)
    blacklist snd_aw2
    
    # causes failure to suspend on HP compaq nc6000 (Ubuntu: #10306)
    blacklist i2c_i801
    
    # replaced by p54pci
    blacklist prism54
    
    # replaced by b43 and ssb.
    blacklist bcm43xx
    
    # most apps now use garmin usb driver directly (Ubuntu: #114565)
    blacklist garmin_gps
    
    # replaced by asus-laptop (Ubuntu: #184721)
    blacklist asus_acpi
    
    # low-quality, just noise when being used for sound playback, causes
    # hangs at desktop session start (Ubuntu: #246969)
    blacklist snd_pcsp
    
    # ugly and loud noise, getting on everyone's nerves; this should be done by a
    # nice pulseaudio bing (Ubuntu: #77010)
    blacklist pcspkr
    
    # EDAC driver for amd76x clashes with the agp driver preventing the aperture
    # from being initialised (Ubuntu: #297750). Blacklist so that the driver
    # continues to build and is installable for the few cases where its
    # really needed.
    blacklist amd76x_edac
    
    
    **** dmesg ****
    
    
    [   30.789816] rtl8192se: Unknown parameter `disable_hw_scan:disable'
    [   31.502335] type=1400 audit(1365444221.102:11): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/mission-control-5" pid=821 comm="apparmor_parser"
    
    
    **************** done ********************

  3. #33
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    14,845
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: slow wifi on Ubuntu 12.04

    Please open this file:
    Code:
    gksudo gedit /etc/modprobe.d/rtl8192se.conf
    and remove:
    Code:
    disable_hw_scan:disable=0
    save the file in gedit close and reboot.
    Thanks

  4. #34
    Join Date
    Mar 2013
    Beans
    21

    Re: slow wifi on Ubuntu 12.04

    Hi,

    when I open the terminal and paste
    Code:
    gksudo gedit /etc/modprobe.d/rtl8192se.conf
    the texeditor opens two tabs. one is "rtl8192se.conf" and the other is "Untitled Document 1 ". Both seem to be empty or at least i cant see anything.

  5. #35
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    14,845
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: slow wifi on Ubuntu 12.04

    Hi, please try
    Code:
    echo 'options rtl8192se swenc=1' | sudo tee /etc/modprobe.d/rtl8192se.conf
    Then open that file again and see if anything is in it. Do not be concerned with the one that says untitled gedit always opens an empty file along with the one you wanted it to open.
    Thanks

  6. #36
    Join Date
    Mar 2013
    Beans
    21

    Re: slow wifi on Ubuntu 12.04

    hello wild man,

    first of all thanks for hanging in there with me. second I did as your previous post said and got this content
    Code:
    options rtl8192se swenc=1
    . However I just looked into the modprobe directory and there are 2 other files with a similar name.
    1. rtl8129.conf
    2. rtl8129se.con


    Number 2 contains
    Code:
    options rtl8192se disable_hw_scan:disable=0
    I asume this is the one i was looking for ans will remove

    Code:
    disable_hw_scan:disable=0
    from here
    Should i also change the remaining text from
    Code:
    options rtl8192se
    to options
    Code:
    rtl8129se
    thanks
    Last edited by noobydooby; April 12th, 2013 at 07:24 PM.

  7. #37
    Join Date
    Mar 2013
    Beans
    21

    Re: slow wifi on Ubuntu 12.04

    just rebooted and wireless is working again. Thanks a lot for your help
    Last edited by noobydooby; April 12th, 2013 at 07:25 PM.

  8. #38
    Join Date
    Feb 2008
    Location
    Texas
    Beans
    14,845
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: slow wifi on Ubuntu 12.04

    That is good!!! If you know the path of the two files I would remove them completely using the sudo rm command, if not it should be okay.
    Thanks

  9. #39
    Join Date
    Sep 2013
    Beans
    2

    Re: Realtek RTL8191SEvB, slow wifi on Ubuntu 12.04

    This thread has greatly helped me to finally solve the random disconnect/poor speed issue on my Toshiba laptop, thank you Wildman!

    I'm on a 3.11 kernel and the situation hasn't improved since the last time I had to use Wifi heavily 2 years ago, but after adding those options:

    Code:
    echo 'options rtl8192se swenc=1 fwlps=0 swlps=1' | sudo tee /etc/modprobe.d/rtl8192se.conf
    and reloading Network Manager and the kernel module, the wifi is flawless, perfectly stable and reaching the same speed it has on Windows

    I'll email the maintainer of the module to make him know, there has been dozens of people on forums and mailing lists asking for a solution (a proper one, without having to turn off power saving) without success.

  10. #40
    Join Date
    Sep 2013
    Beans
    2

    Re: Realtek RTL8191SEvB, slow wifi on Ubuntu 12.04

    I spoke too fast, it still seems very random. Sometimes it's rock stable and fast and sometimes the old issues are back. After a few tries it works though, and to reload everything without restarting the computer you can use:

    Code:
    killall plasma-desktop ; sudo stop network-manager ; sleep 2; sudo rmmod rtl8192se ; sleep 1; sudo modprobe rtl8192se; sleep 2; sudo start network-manager ; plasma-desktop & disown
    (plasma-desktop is KDE-specific, there should be a similar process for the NM applet on Unity and it may not even be needed to restart it)

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