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Thread: slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

  1. #1
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    slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

    so i installed ubuntu four days ago on my toshiba SATELLITE-C855-2CF and everything is going well, but i noticed that my wifi connection is slow and when i did a speed test online i found that i have only 0.9 Mbps and when i did the speed test on windows i have 4Mbps so can someone tell me how can i fix this problem ? if don't find any solution for this problem i'll have to go back to windows and leave ubuntu.

    here is some info:


    $ iwconfig
    eth0 no wireless extensions.

    lo no wireless extensions.

    wlan0 IEEE 802.11bgn ESSID:"SAGEM_C40B"
    Mode:Managed Frequency:2.437 GHz Access Point: 4C:17:EB:3E:C4:0C
    Bit Rate=18 Mb/s Tx-Power=20 dBm
    Retry long limit:7 RTS thr=2347 B Fragment thr: off
    Power Management: off
    Link Quality=34/70 Signal level=-76 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:0 Invalid misc:6967 Missed beacon:0

    $ lsmod | grep rtl
    rtl8723ae 86459 0
    rtlwifi 79673 1 rtl8723ae
    mac80211 606457 1 rtlwifi
    cfg80211 510937 2 mac80211,rtlwifi


    $ lspci | grep RTL
    02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723AE PCIe Wireless Network Adapter
    03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)

    $ sudo lshw -class network
    *-network
    description: Wireless interface
    product: RTL8723AE PCIe Wireless Network Adapter
    vendor: Realtek Semiconductor Co., Ltd.
    physical id: 0
    bus info: pci@0000:02:00.0
    logical name: wlan0
    version: 00
    serial: 2c:d0:5a:3e:ee:bb
    width: 64 bits
    clock: 33MHz
    capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
    configuration: broadcast=yes driver=rtl8723ae driverversion=3.8.0-27-generic firmware=N/A ip=192.168.1.6 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
    resources: irq:17 ioport:3000(size=256) memory:c2400000-c2403fff
    *-network
    description: Ethernet interface
    product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
    vendor: Realtek Semiconductor Co., Ltd.
    physical id: 0
    bus info: pci@0000:03:00.0
    logical name: eth0
    version: 05
    serial: 70:54:d2:d6:d0:2b
    size: 10Mbit/s
    capacity: 100Mbit/s
    width: 64 bits
    clock: 33MHz
    capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
    configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8105e-1.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s
    resources: irq:41 ioport:2000(size=256) memory:c0004000-c0004fff memory:c0000000-c0003fff
    Last edited by rchod; August 8th, 2013 at 02:02 AM.

  2. #2
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    Re: slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

    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
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    Re: slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

    I really thank you for your help, here is the generated file
    Attached Files Attached Files

  4. #4
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    Re: slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

    To start with you link quality is very low, how close to the router are you? is there a wall or anything between the router and your computer?

    Next in the dmesg it says
    disabling HT as WMM/QoS is not supported by the AP
    try changing your encryption in the router to just wpa2 AES if you have that option. May also say CCMP I believe instead of AES.
    Thanks

  5. #5
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    Re: slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

    the router is in the room above me, so there's one wall between the computer and the router. I don't have access to the router because it's not mine, isn't there a solution by chaging some options in ubuntu ?

  6. #6
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    Re: slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

    This sounds like the same thing I had at one point with my HP G72 laptop. Even the speed, 0.9, is about the same. I found it was a rubbish driver - it was also supplied with Windows 8 actually. The fix I found was at this url:

    http://www.upubuntu.com/2012/10/how-...-problems.html

    It worked like a dream - I went from 0.9 to 10 in a few seconds! Strangely I haven't had the issue in the last few installs of either Windows or Ubuntu. Hope this helps resolve the problem!

    [Quick Edit here - for what it's worth, the fix in Windows 8 was actually to download the old driver from HP and tell Win Update to ignore the "Update".]

    Richard
    Last edited by richaustin; August 17th, 2013 at 10:55 PM.

  7. #7
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    Re: slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

    That setting really needs to bechanged.
    Last edited by Wild Man; August 21st, 2013 at 01:35 AM.

  8. #8
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    Re: slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

    You can also set your wireless settings to match the screenshots but it probably will not completely make up for not changing that setting. I will look and see if changing any driver parameters might help.

    Okay you can also run this command, that is all I know to try, with the ceiliing between the router and your device the link quaility is low I am not sure how much this will help.
    Code:
    echo "options rtl8723ae ips=0 fwlps=0" | sudo tee /etc/modprobe.d/rtl8723ae .conf
    sudo modprobe -rfv rtl8723ae
    sudo modprobe -v rtl8723ae
    Attached Images Attached Images
    Last edited by Wild Man; August 21st, 2013 at 01:51 AM.

  9. #9
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    Re: slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

    thanks for your reply, i did the last commands you give me but the nothing changed, and i changed the settings to match the snap shots but it didn't help much, i just wonder why in win7 i have a speed of 4.1 Mb/s and in ubuntu i have 1.1~1.5 Mb/s ?

  10. #10
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    Re: slow wifi connection on ubuntu 13.04 with rtl8723ae realtek wireless driver

    so first of all i want to thank you for your help Mr Wild Man, i really appreciated.

    I finally found a solution to this hell, so simply the problem was in the built -in ubuntu driver it was not working good, the connection was so slow (max=0.9Mbps), now i installed the ]the official Linux driver available unofficially (via Dropbox).
    the link to the full answer is here http://askubuntu.com/questions/13963.../165002#165002

    but for me the driver didn't compile, it gave me some errors to i looked again and found this driver that finally worked like a charm http://askubuntu.com/questions/29275...network-driver, now i have 3.8~4.0 Mbps so i'm really glad

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