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Thread: 10.10 Broadcom wireless BCM43224 - unstable latency

  1. #1
    Join Date
    Oct 2010
    Beans
    6

    10.10 Broadcom wireless BCM43224 - unstable latency

    Hi,

    Since upgrading to 10.10 I have a problem with the latency through the wireless being very unstable, Ping times goes between 1ms to 200 or 300 ms even when signal strength is very good.

    This is pinging the wireless router
    Code:
    $ ping 10.10.10.1
    PING 10.10.10.1 (10.10.10.1) 56(84) bytes of data.
    64 bytes from 10.10.10.1: icmp_req=1 ttl=64 time=3.24 ms
    64 bytes from 10.10.10.1: icmp_req=2 ttl=64 time=194 ms
    64 bytes from 10.10.10.1: icmp_req=3 ttl=64 time=174 ms
    64 bytes from 10.10.10.1: icmp_req=4 ttl=64 time=132 ms
    64 bytes from 10.10.10.1: icmp_req=5 ttl=64 time=73.7 ms
    64 bytes from 10.10.10.1: icmp_req=6 ttl=64 time=1.39 ms
    64 bytes from 10.10.10.1: icmp_req=7 ttl=64 time=200 ms
    64 bytes from 10.10.10.1: icmp_req=8 ttl=64 time=2.47 ms
    - Prior on 10.04 I did not have this issue.

    - Dual boot into Windows7 doing the same test & latency is normal so must be Ubuntu deriver issue.

    - Also I've tried with other different wireless APs and while other users does not have issues with the same AP.

    I've tried reinstalling the Broadcom STA driver from repository and also by building manually.

    Anyone come across this?

    Is it possible for me to go back to an old driver on 10.04 for example? Any direction would be much appreciated as I haven't found any in my search. Bare in mind I'm no linux expert.

    My specs are:

    HP ProBook 6540b

    Code:
    $ uname -a
    Linux orc-b 2.6.35-22-generic #35-Ubuntu SMP Sat Oct 16 20:45:36 UTC 2010 x86_64 GNU/Linux
    
    $ lspci -nn | grep Network
    44:00.0 Network controller [0280]: Broadcom Corporation BCM43224 802.11a/b/g/n [14e4:4353] (rev 01)
    
    $lsmod  | grep "b43\|ssb\|wl"
    wl                   1965295  0 
    lib80211                6175  2 wl,lib80211_crypt_tkip
    I've tried build the Broadcom STA drivers manually using the x64 driver
    http://www.broadcom.com/docs/linux_s...0.246.2.tar.gz


    I'd like to get this fixed as even a simple telnet session via the wireless is painful.

  2. #2
    Join Date
    Oct 2010
    Beans
    6

    Re: 10.10 Broadcom wireless BCM43224 - unstable latency

    Fixed by using ndiswrapper and using a WinXP 64bit driver from HP website.

  3. #3
    Join Date
    Oct 2010
    Beans
    6

    Re: 10.10 Broadcom wireless BCM43224 - unstable latency

    Spoke too soon. Ubuntu will hang on boot 9 out of 10 tries with the ndiswrapper winxp 64bit driver installed. I've had to remove the ndiswrapper driver for now.

  4. #4
    Join Date
    Nov 2010
    Beans
    1

    Re: 10.10 Broadcom wireless BCM43224 - unstable latency

    Same here with the MacBook Pro 6,2

    Can't get a constant speed with the Broadcom STA drivers.
    No problem in Win7.

  5. #5
    Join Date
    Oct 2008
    Beans
    13

    Re: 10.10 Broadcom wireless BCM43224 - unstable latency

    Macbook pro 7,1 same issue... I have to use external USB to get decent connection ;o(

  6. #6
    Join Date
    Dec 2009
    Beans
    2

    Re: 10.10 Broadcom wireless BCM43224 - unstable latency

    Same problem here though with Linux mint 10 (based on Ubuntu 10.10)
    Running on a Dell mini 10
    Did you manage to find a solution?

    my details:

    lspci -nn | grep Network

    03:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)

    uname -a
    Linux runabout 2.6.35-22-generic #35-Ubuntu SMP Sat Oct 16 20:36:48 UTC 2010 i686 GNU/Linux

  7. #7
    Join Date
    Dec 2009
    Beans
    2

    Re: 10.10 Broadcom wireless BCM43224 - unstable latency

    Sort of solved
    If I do this:
    sudo iwconfig eth1 power off
    ping times drop down to a couple of milliseconds and are stable
    If I do this
    sudo iwconfig eth1 power on
    they go back to randomly long values.
    This command turns on/off power management on the interface. So it would seem that power management is the culprit here.
    This effect is totally repeatable.

  8. #8
    Join Date
    Jan 2011
    Beans
    14

    Re: 10.10 Broadcom wireless BCM43224 - unstable latency

    This thread really helped me out as well: http://ubuntuforums.org/showthread.php?p=10368636

  9. #9
    Join Date
    Feb 2011
    Beans
    1

    Re: 10.10 Broadcom wireless BCM43224 - unstable latency

    Quote Originally Posted by frank3d View Post
    Sort of solved
    If I do this:
    sudo iwconfig eth1 power off
    ping times drop down to a couple of milliseconds and are stable
    If I do this
    sudo iwconfig eth1 power on
    they go back to randomly long values.
    This command turns on/off power management on the interface. So it would seem that power management is the culprit here.
    This effect is totally repeatable.
    +1 for this, many thanks. Wireless on my Dell E6410 goes from entirely unusable to really quite good. Here's some info:

    Code:
    eth3      IEEE 802.11abgn  ESSID:"xxxxxx"  
              Mode:Managed  Frequency:2.412 GHz  Access Point: 00:26:44:xx:xx:xx   
              Bit Rate=54 Mb/s   Tx-Power:24 dBm   
              Retry min limit:7   RTS thr:off   Fragment thr:off
              Encryption key:off
              Power Management:off
              Link Quality=5/5  Signal level=-52 dBm  Noise level=-94 dBm
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:21  Invalid misc:0   Missed beacon:0
    Code:
    tf@tf-latitude:~$ lspci | grep -i broadcom
    03:00.0 Network controller: Broadcom Corporation BCM43224 802.11a/b/g/n (rev 01)
    Access point is configured as follows:
    Security Mode: WPA-PSK
    WPA-PSK Encryption: TKIP+AES
    WPA-PSK Version: WPA+WPA2

    How do I permanently turn off power management for this interface short of sticking this command in a startup script?

  10. #10
    Join Date
    Nov 2011
    Beans
    1

    Smile Re: 10.10 Broadcom wireless BCM43224 - unstable latency

    Hello, i'm a real newbie to all the linux world, i come from a professional career on microsoft platforms, even though i started configuring for the first time an IPcop

    Anyway, i now have in my posession a DELL Vostro 3400 for work and i recently installed Ubuntu 11.10 x64.

    The only challenge to face was the integration of the Wireless Lan Driver.

    a month ago i downloades the broadcom official driver from here:

    http://www.broadcom.com/support/802.11/linux_sta.php

    Back then the version was v5.100.82.38 and i had these latency problems everyday.

    The command mentioned on this post didn't worked for me, the system says Operation Not Supported.

    Yesterday i found a new version of the driver on the same page.

    This Version 5.100.82.112 fixed my problem without the setting of sudo iwconfig eth1 power off

    I hope this can help anyone out there, since it would be my first contribution (i hope) to the Open Source World.

    Thank You!

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