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Thread: b43 and BCM4312 802.11a/b/g slow combination?

  1. #1
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    Default b43 and BCM4312 802.11a/b/g slow combination?

    Hi,

    On the b43 website I found support for BCM4312 802.11a/b/g:

    PCI-ID State Chip Modes PHY version Driver
    14e4:4312 supported (802.11g only) BCM4312 a/b/g G b43
    My laptop has opensuse 11.2:
    Code:
    uname -a
    Linux a3800 2.6.31.12-0.1-desktop #1 SMP PREEMPT 2010-01-27 08:20:11 +0100 x86_64 x86_64 x86_64 GNU/Linux
    
    lspci -vvnn
    30:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11a/b/g [14e4:4312] (rev 02)
            Subsystem: Hewlett-Packard Company Broadcom 802.11a/b/g WLAN [103c:1371]
    b43 does work, but the rate is 1~5Mbit/s and thats way to slow... On opensuse 10.3 with wl module it was a solid 48~54Mbit/s
    Changing the rate with "iwconfig wlan0 rate 54M" does not speed things up. (iwconfig shows 54M after the command, but up/downloads are not faster)

    Loaded modules:
    Code:
    lsmod | grep b43
    b43                   175096  0
    mac80211              257120  1 b43
    cfg80211              123296  2 b43,mac80211
    ssb                    63672  1 b43
    pcmcia                 47292  2 b43,ssb
    pcmcia_core            50084  5 b43,ssb,yenta_socket,pcmcia,rsrc_nonstatic
    
    dmesg
    [   26.920232] BIOS EDD facility v0.16 2004-Jun-25, 1 devices found                                                                                          
    [   28.138781] Bluetooth: L2CAP ver 2.13                                                                                                                     
    [   28.138789] Bluetooth: L2CAP socket layer initialized                                                                                                     
    [   28.691436] Bluetooth: BNEP (Ethernet Emulation) ver 1.3                                                                                                  
    [   28.691446] Bluetooth: BNEP filters: protocol multicast                                                                                                   
    [   28.766578] Bridge firewalling registered                                                                                                                 
    [   28.817647] Bluetooth: SCO (Voice Link) ver 0.6                                                                                                           
    [   28.817657] Bluetooth: SCO socket layer initialized                                                                                                       
    [   28.940066] Bluetooth: RFCOMM TTY layer initialized                                                                                                       
    [   28.940079] Bluetooth: RFCOMM socket layer initialized                                                                                                    
    [   28.940085] Bluetooth: RFCOMM ver 1.11                                                                                                                    
    [   32.726272] tg3 0000:10:00.0: PME# disabled                                                                                                               
    [   32.726558]   alloc irq_desc for 27 on node 0                                                                                                             
    [   32.726565]   alloc kstat_irqs on node 0                                                                                                                  
    [   32.726596] tg3 0000:10:00.0: irq 27 for MSI/MSI-X                                                                                                        
    [   32.781579] ADDRCONF(NETDEV_UP): eth0: link is not ready                                                                                                  
    [   32.803078] b43 ssb0:0: firmware: requesting b43/ucode13.fw                                                                                               
    [   32.881423] b43 ssb0:0: firmware: requesting b43/b0g0initvals13.fw                                                                                        
    [   33.054049] b43-phy0: Loading firmware version 410.2160 (2007-05-26 15:32:10)                                                                             
    [   33.097566] Registered led device: b43-phy0::tx                                                                                                           
    [   33.098430] Registered led device: b43-phy0::rx                                                                                                           
    [   33.098986] Registered led device: b43-phy0::radio                                                                                                        
    [   33.109753] ADDRCONF(NETDEV_UP): wlan0: link is not ready                                                                                                 
    [   33.172619] NET: Registered protocol family 17                                                                                                            
    [   49.797545] wlan0: authenticate with AP 00:14:6c:9a:b6:c4                                                                                                 
    [   49.799121] wlan0: authenticated                                                                                                                          
    [   49.799128] wlan0: associate with AP 00:14:6c:9a:b6:c4                                                                                                    
    [   49.802435] wlan0: RX AssocResp from 00:14:6c:9a:b6:c4 (capab=0x411 status=0 aid=1)                                                                       
    [   49.802440] wlan0: associated                                                                                                                             
    [   49.803700] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
    [   60.772030] wlan0: no IPv6 routers present
    [   61.424081] RPC: Registered udp transport module.
    [   61.424097] RPC: Registered tcp transport module.
    [   61.438982] Slow work thread pool: Starting up
    [   61.439309] Slow work thread pool: Ready
    [   61.439377] FS-Cache: Loaded
    [   61.462107] FS-Cache: Netfs 'nfs' registered for caching
    What can I do to speed things up?
    I tried the Broadcom wl module, but it was very unstable (on/off all the time) and slow speed.
    I tried ndiswrapper, it has stable connection and proper 54Mbit/s speed but it makes my system freeze at boot 2 out of 3 times...

    Any help is much appreciated!
    Fooling around with Linux since Redhat 5.1 / Hooked on SuSE since 9.2

  2. #2
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    Default Re: b43 and BCM4312 802.11a/b/g slow combination?

    On 03/21/2010 09:36 AM, Fire11 wrote:
    >
    > What can I do to speed things up?
    > I tried the Broadcom wl module, but it was very unstable (on/off all
    > the time) and slow speed.
    > I tried ndiswrapper, it has stable connection and proper 54Mbit/s speed
    > but it makes my system freeze at boot 2 out of 3 times...
    >
    > Any help is much appreciated!


    The ndiswrapper experience is typical. With it, you are letting a Windows driver
    run unchecked in the inner-most ring of the computer. The freezes you see would
    be "Blue Screens of Death" on Windows.

    There is a patch that improves transmit performance of your device that is in
    later kernels. It has not been backported to the 11.2 kernel as 2.6.31 is no
    longer maintained as a "stable" kernel. To get the benefits of this patch,
    please get the 2.6.33 kernel from the Factory repo, or the compat-wireless
    package from Packman.

  3. #3
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    Default Re: b43 and BCM4312 802.11a/b/g slow combination?

    Thanks for the reply.

    Installing a newer kernel into opensuse would not be so easy so I want to go for the compat-wireless package.

    I do have the packman repository, but in yast I do not find the package?
    Fooling around with Linux since Redhat 5.1 / Hooked on SuSE since 9.2

  4. #4
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    Default Re: b43 and BCM4312 802.11a/b/g slow combination?

    does the broadcom-wl package from packman not work with your device?
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  5. #5
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    Default Re: b43 and BCM4312 802.11a/b/g slow combination?

    Hi caf4926, yes and no.
    The connection can be made but it is unstable.

    I just tried compat-wireless patch but after that i was unable to logon in KDE4!

    Found the package at:
    Index of /repositories/home:/broumbroum23/openSUSE_11.2_oss
    Fooling around with Linux since Redhat 5.1 / Hooked on SuSE since 9.2

  6. #6
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    Default Re: b43 and BCM4312 802.11a/b/g slow combination?

    On 03/21/2010 11:36 AM, Fire11 wrote:
    >
    > Hi caf4926, yes and no.
    > The connection can be made but it is unstable.
    >
    > I just tried compat-wireless patch but after that i was *unable* to
    > logon in KDE4!
    >
    > Found the package at:
    > 'Index of /repositories/home:/broumbroum23/openSUSE_11.2_oss'
    > (http://tinyurl.com/yzxwzm8)


    I think you picked the wrong package. You need the one that matches your kernel
    as shown by 'uname -r'.

    For the record, the BCM4312 802.11a/b/g device has the same b/g part as a
    BCM4311. It works with b43 since 2.6.24. It is the BCM4312 802.11b/g that needs
    wl or b43 from 2.6.32, or later. Confusing enough?

  7. #7
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    Default Re: b43 and BCM4312 802.11a/b/g slow combination?

    Also for the record my wireless is:

    04:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g [14e4:4315] (rev 01)
    Subsystem: Broadcom Corporation Device [14e4:04b5]
    Kernel driver in use: wl
    I tried the newer kernel and it works, but not as well as with the Packman broadcom-wl packages

    Code:
    broadcom-wl-5.60.48.36-7.pm.13.1.x86_64
    broadcom-wl-kmp-default-5.60.48.36_2.6.31.12_0.1-7.pm.13.1.x86_64
    Actually my wireless works better than my eth0
    07:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM5906M Fast Ethernet PCI Express [14e4:1713] (rev 02)
    Subsystem: Lenovo IdeaPad S10e [17aa:3a23]
    Kernel driver in use: tg3
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  8. #8
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    Default Re: b43 and BCM4312 802.11a/b/g slow combination?

    Well, it seems more easy to boot with kernel 2.6.33 than I thought it would be.

    now booted with:
    Code:
    uname -r
    2.6.33-6-desktop
    I did not change anything else and it seems that there is no improvement in performance!
    I don't know what to try next...
    Fooling around with Linux since Redhat 5.1 / Hooked on SuSE since 9.2

  9. #9
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    Default Re: b43 and BCM4312 802.11a/b/g slow combination?

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  10. #10
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    Default Re: b43 and BCM4312 802.11a/b/g slow combination?

    Hi caf4926,

    I tried that repository kernel-2.6.33-34 but rolled back to 2.6.33-6-desktop from: Index of /factory/repo/oss

    Earlier I mentioned no improvement with this kernel but I was wrong! The performance is 2~10x better:
    - download > 1,5~2,0 Mbyte/s (+/-15Mbit/s)
    - upload > 1.0~1,5 Mbyte/s (+/-11Mbit/s)

    Hopefully it does not break any other functionality (3 modules are not loaded at boot)

    Sticking to this kernel for now, thanks lwfinger and caf4926!
    Fooling around with Linux since Redhat 5.1 / Hooked on SuSE since 9.2

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