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Thread: Wireless network connection very unstable.

  1. #1
    Join Date
    Jul 2012
    Beans
    18

    Wireless network connection very unstable.

    I'm having troubles with my internet connection in ubuntu right now. Well, a few actually.

    First, when I compare my speeds between ubuntu and Windows, I'm getting double my link speed on Windows than on ubuntu.

    Second, my internet connection periodically drops. Usually when I'm downloading a large file or putting a large load on my connection. I can't connect to the internet for a few seconds and then my connection just drops and tries to reconnect (which is does after a few seconds).

    I've tried a few fixes I've found around Google but none of them have helped me. My wired connection is perfectly fine but my router is in a place where I can't use wired as my default connection. My wireless connection is the one with the problems.

    sudo lshw -c network:
    Code:
      *-network               
           description: Ethernet interface
           product: RTL8111/8168B PCI Express Gigabit Ethernet controller
           vendor: Realtek Semiconductor Co., Ltd.
           physical id: 0.2
           bus info: pci@0000:02:00.2
           logical name: eth0
           version: 0a
           serial: 20:6a:8a:84:f6:85
           size: 10Mbit/s
           capacity: 1Gbit/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 1000bt 1000bt-fd autonegotiation
           configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=N/A latency=0 link=no multicast=yes port=MII speed=10Mbit/s
           resources: irq:42 ioport:2000(size=256) memory:f0404000-f0404fff memory:f0400000-f0403fff
      *-network
           description: Wireless interface
           product: AR9462 Wireless Network Adapter
           vendor: Atheros Communications Inc.
           physical id: 0
           bus info: pci@0000:03:00.0
           logical name: wlan0
           version: 01
           serial: 44:6d:57:b0:8b:e1
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
           configuration: broadcast=yes driver=ath9k driverversion=3.2.0-29-generic firmware=N/A ip=192.168.11.150 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
           resources: irq:19 memory:f0500000-f057ffff memory:dfa00000-dfa0ffff

  2. #2
    Join Date
    Jul 2012
    Beans
    18

    Re: Wireless network connection very unstable.

    Help?

  3. #3
    Join Date
    Apr 2012
    Beans
    18

    Re: Wireless network connection very unstable.

    Hi,

    What version of ubuntu are you on?

  4. #4
    Join Date
    Apr 2012
    Beans
    5,524

    Re: Wireless network connection very unstable.

    Have you tried the ath9k nohwcrypt option?

    Code:
    sudo modprobe -r ath9k
    sudo modprobe ath9k nohwcrypt=1
    This will set the parameter temporarily - if it helps with the disconnect problem post back and we can make it persistent via a /etc/modprobe.d conf file

  5. #5
    Join Date
    Jul 2012
    Beans
    18

    Re: Wireless network connection very unstable.

    I'm on 12.04.01 right now.

    Quote Originally Posted by steeldriver View Post
    Have you tried the ath9k nohwcrypt option?

    Code:
    sudo modprobe -r ath9k
    sudo modprobe ath9k nohwcrypt=1
    This will set the parameter temporarily - if it helps with the disconnect problem post back and we can make it persistent via a /etc/modprobe.d conf file
    I'll give this a shot.

  6. #6
    Join Date
    Jul 2012
    Beans
    18

    Re: Wireless network connection very unstable.

    Quote Originally Posted by steeldriver View Post
    Have you tried the ath9k nohwcrypt option?

    Code:
    sudo modprobe -r ath9k
    sudo modprobe ath9k nohwcrypt=1
    This will set the parameter temporarily - if it helps with the disconnect problem post back and we can make it persistent via a /etc/modprobe.d conf file
    No go with that. A few minutes after I put that command in, the internet did it's normal crash. Space out for 10 seconds and disconnect.

  7. #7
    Join Date
    Apr 2012
    Beans
    18

    Re: Wireless network connection very unstable.

    Have you checked additional drivers for wireless network adapter?

  8. #8
    Join Date
    Jul 2012
    Beans
    18

    Re: Wireless network connection very unstable.

    Quote Originally Posted by ectechnologies View Post
    Have you checked additional drivers for wireless network adapter?
    Yeah, I usually check the additional drivers page right after installing ubuntu and I had nothing on the page. Checking again, there is still nothing there.

  9. #9
    Join Date
    Apr 2012
    Beans
    18

    Re: Wireless network connection very unstable.

    Are you on a satellite provider like hughes net? If so, you might only be able to use a set amount of bandwidth.

  10. #10
    Join Date
    Jul 2012
    Beans
    18

    Re: Wireless network connection very unstable.

    Quote Originally Posted by ectechnologies View Post
    Are you on a satellite provider like hughes net? If so, you might only be able to use a set amount of bandwidth.
    Running a fiber connection with no bandwidth caps and I'm usually getting 110 mbps download speeds, don't think that's the problem.

    Another note, because the weaker link speed, I have to have my computer closer to the router and right now I have a 130 mbps link speed. The connection can't handle anything near that load though. I've noticed I can keep the connection running forever without it disconnecting, for example, if I'm just typing something up with nothing downloading. When I'm downloading something, watching a video, or browsing websites with a lot of media, it'll disconnect after a few minutes.
    Last edited by daenth; August 31st, 2012 at 04:39 PM.

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