Re: brcmfmac43241b4-sdio / Thinkpad Tablet 10 issues

Re: brcmfmac43241b4-sdio / Thinkpad Tablet 10 issues

[Arend van Spriel]

+ lists

On 02/17/15 07:38, Sebastien Bourdeauducq wrote:
> Hi,
>
> have you been able to try out the driver on a brcm43241b4-sdio chip with
> the same revision as mine and reproduce the "HT avail timeout" bug? Just
> let me know if you would like me to test anything on my machine.

I received the vaio duo 13 laptop last friday. Unfortunately, it says:

chip 4324 rev 5 pmurev 17

So it is a one-off and not showing the issue you are seeing. Your issue 
seems to be due to failing firmware so you may need b5 firmware. I will 
look into this.

Thanks,
Arend

Re: brcmfmac43241b4-sdio / Thinkpad Tablet 10 issues

[Sebastien Bourdeauducq]

On Tuesday, February 17, 2015 03:49 AM, Arend van Spriel wrote:
> So it is a one-off and not showing the issue you are seeing. Your issue
> seems to be due to failing firmware so you may need b5 firmware.

Making some progress :)

I have extracted the firmwares from the Lenovo Windows driver, which 
contains:

43241b4rtecdc.bin  4324b5rtecdc.bin  4330b2rtecdc.bin  43341b0rtecdc.bin

I have used 4324b5rtecdc.bin in place of brcmfmac43241b4-sdio.bin in 
/lib/firmware. This time it goes further, and I can scan for networks, 
associate (only tried without encryption so far), and transmit packets 
(which are correctly received by another device in monitor mode).

However, the MAC address reported by ifconfig does not match the one in 
brcmfmac43241b4-sdio.txt, and the brcmfmac device fails to correctly 
receive packets.

The RX packets fall in three categories:
1) dropped at a lower level
2) reported as "dropped" by ifconfig
3) received but corrupted, shown with ethertype 0x886c and containing 
the string "wl0" which I guess is related to the firmware and should not 
be there.

I guess that the driver has bugs with decoding some of the data sent by 
the card.

I'm sending you privately a log with debug=0x1416 (association + DHCP) 
and a pcap trace showing packets of category 3.

Sebastien

Re: brcmfmac43241b4-sdio / Thinkpad Tablet 10 issues

[Jocky Wilson]

Sebastien Bourdeauducq <sb@...> writes:

> 
> On Tuesday, February 17, 2015 03:49 AM, Arend van Spriel wrote:
> > So it is a one-off and not showing the issue you are seeing. Your issue
> > seems to be due to failing firmware so you may need b5 firmware.
> 
> Making some progress :)
> ...
> I guess that the driver has bugs with decoding some of the data sent by 
> the card.
> 
I can confirm this with my Thinkpad Tablet 8 
which has same chip revision. 
Arend: do you need anything else to be tested?

/JockyW

Re: brcmfmac43241b4-sdio / Thinkpad Tablet 10 issues

[Arend van Spriel]

On 02/25/15 13:23, Jocky Wilson wrote:
> Sebastien Bourdeauducq<sb@...>  writes:
>
>>
>> On Tuesday, February 17, 2015 03:49 AM, Arend van Spriel wrote:
>>> So it is a one-off and not showing the issue you are seeing. Your issue
>>> seems to be due to failing firmware so you may need b5 firmware.
>>
>> Making some progress :)
>> ...
>> I guess that the driver has bugs with decoding some of the data sent by
>> the card.
>>
> I can confirm this with my Thinkpad Tablet 8
> which has same chip revision.
> Arend: do you need anything else to be tested?

Nope. As it turns out this chip revision indeed needs b5 firmware. As 
windows and linux use different firmware we will need to release that to 
linux-firmware and modify brcmfmac to pick it up properly. Keep an eye 
out for those patches.

Regards,
Arend

> /JockyW
>
>
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