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Thread: Broadcom4313 random disconnect

  1. #1
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    Mar 2011
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    [solved] Broadcom4313 random disconnect

    I had an Acer Aspire One 722 with the Atheros Wifi card and it worked fine on 11.04. So we bought 200 of them for our school. However these all came with the Broadcom BCM4313 wireless card and there are issues. It is using the brcmsmac driver and they connect initially. However after a time (sometimes just a few webpages) some of them lose connection. However, they still have an IP and network-manager says they are connected, but no pages load and you can't ping anything on the LAN or internet. A disconnect/reconnect can fix it, but sometimes a restart is required. It happens frequently so is a major issue. Lots of broadcom drivers are blacklisted: bcm43xx, b43, brcm80211. Any ideas or experiences with the broadcom4313 card? Please save these computers from a Windows fate!
    Last edited by biodojo; June 1st, 2012 at 01:52 PM.

  2. #2
    Join Date
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    Ubuntu 16.10 Yakkety Yak

    Re: Broadcom4313 random disconnect

    Are you certain that brcmsmac is correct for that device? How about we fine tune one of those babies and then you can fix up 199? Please run and post:
    Code:
    lspci -nn | grep 0280
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  3. #3
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    Re: Broadcom4313 random disconnect

    Thanks for the reply and offer of help!

    Here is the lspci output

    07:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01)

    I also tried running tail -f /var/log/syslog on a machine that had an issue:
    wpa_supplicant[1029]: Failed to initiate AP scan.
    last message repeated 61 times (which repeats every minute)

    This message is on both netbooks I have with me that have the issue, and the working ones have very different outputs.

  4. #4
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    Ubuntu Gnome 14.04 Trusty Tahr

    Re: Broadcom4313 random disconnect

    You need to blacklist the modules bcma and brcmsmac, too, and install the Broadcom-STA driver from "additional drivers". Reboot after that.

  5. #5
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    Re: Broadcom4313 random disconnect

    Thanks for the suggestion.
    I will try this other driver, though other posts say that the brcmsmac is the one to use and that the STA driver is the bad one so I guess it might be just try them both and see which one is the most stable on the particular hardware configuration.

    https://help.ubuntu.com/community/AspireOne522#Wireless

  6. #6
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    Re: Broadcom4313 random disconnect

    As much as I respect my esteemed colleague praseodym, I suggest you try brcmsmac first.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  7. #7
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    Re: Broadcom4313 random disconnect

    We are currently using brcmsmac In some testing today Ifound that the one netbook running 12.04 and using the brcmsmac didn't disconnect, while the 2 running 11.04 did disconnect (in that very strange way). I will try updating my 3 test machines to 12.04 and see how they behave tomorrow.
    We are using a customized version of Ubuntu called Ubermix and the 12.04 version is still in beta, but it could be the answer to our issue.

  8. #8
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    Ubuntu Gnome 14.04 Trusty Tahr

    Re: Broadcom4313 random disconnect

    Thats the best idea, brcmsmac improved with kernel 3.2. Unblacklist the driver after that and uninstall the STA driver.

  9. #9
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    Re: Broadcom4313 random disconnect

    Running on 12.04 the wifi has connected reliably in testing. There are occasional hangs in connectivity on our school network nut I can't see any messages in dmesg that report an issue. t occurs about 1 every 15 minutes but if I wait a few seconds and reload the page the connection resumes, so it is very usable.

  10. #10
    Join Date
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    Ubuntu Gnome 14.04 Trusty Tahr

    Re: Broadcom4313 random disconnect

    Which encryption mode is in use? I recommend usinf WPA2-AES (CCMP), if possible.

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