Re: BCM4313 & brcmsmac & 3.12: only semi-working?

[Michael Tokarev <mjt@tls.msk.ru>]

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Thank you very much for the reply!

28.12.2013 13:42, Arend van Spriel wrote:
> On 12/27/2013 09:58 PM, Michael Tokarev wrote:
>> Hello.
>>
>> Got a Lenovo Thinkpad notebook with the following wifi card:
>>
>> 03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01)
>>     Subsystem: Broadcom Corporation Device [14e4:0608]
>>     Flags: bus master, fast devsel, latency 0, IRQ 17
>>     Memory at f1600000 (64-bit, non-prefetchable) [size=16K]
>>     Capabilities: [40] Power Management version 3
>>     Capabilities: [58] Vendor Specific Information: Len=78 <?>
>>     Capabilities: [48] MSI: Enable- Count=1/1 Maskable- 64bit+
>>     Capabilities: [d0] Express Endpoint, MSI 00
>>     Capabilities: [100] Advanced Error Reporting
>>     Capabilities: [13c] Virtual Channel
>>     Capabilities: [160] Device Serial Number 00-00-24-ff-ff-fe-48-d2
>>     Capabilities: [16c] Power Budgeting <?>
>>     Kernel driver in use: bcma-pci-bridge

[wifi tx stalls after short usage, 3.12 kernel]

>> P.S. I tried to find archives of brcm80211 list, or a way to
>> subscribe to it before posting, but found neither.  Are there
>> archives?
> 
> Nope. The brcm80211-dev-list is just a (hopefully) convenient way to get
> your message to the brcm80211 driver developer within Broadcom. So it is
> always best to Cc: the linux-wireless list as well.

Ah.  So the real archives should be for linux-wireless@ not for brcm..@ :)
Got it, thank you!

> Now about your card. I am not sure where to start, but can you dump
> contents for following debugfs file:
> 
> /sys/kernel/debug/brcmsmac/bcma*/hardware

# cat /sys/kernel/debug/brcmsmac/bcma0\:0/hardware
board vendor: 14e4
board type: 608
board revision: 1109
board flags: 402201
board flags2: 884
firmware revision: 262032c

> Also a capture file would be great so if you have wireshark or dumpcap you can add monitor interface and capture 802.11 packets from connect up until the stalls. Commands for adding/enabling monitor interface (ass root/sudo):
> 
> # iw dev wlan0 interface add mon0 type monitor
> # ifconfig mon0 up

Capture file made with tcpdump is attached (gzipped).  I started the
capture with wlan0 disabled, next I  used `nmcli con up id "wifi mjt"'
to connect to the AP (named, obviously, "mjt"), and next I tried to
d/load a file from my website (86.62.121.231).  It d/loaded about 27Kb
and stalled.  Next I tried to ping the AP (192.168.88.65), which also
didn't work.

That's quite a typical behavour of this whole thing.  Sometimes it
lasts a bit longer, but that's rather unusual and it ends up stalling
anyway.

Is it worth the effort to try 3.13-tobe kernel here?  I browsed changes
in there made in drivers/net/wireless/brcm80211/ compared with 3.12, but
there aren't many changes related to the softmac version, and most
looks rather cosmetic.

Thank you very much for the help!

/mjt

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