Re: Connection loss (IWD HEAD with latest OWE / BSS selection patches) - brcmfmac driver

James Prestwood
2024-10-25T11:48:15Z

Hi Martin,

On 10/25/24 4:10 AM, Martin Petzold wrote:
> Hi all,
>
> Am 25.10.24 um 12:12 schrieb Martin Petzold:
>> Hi all,
>>
>> I open a new thread for this one: During the last weeks I have seen
>> connection losses for 30+ minutes, sometimes even hours or just now
>> even forever (IWD HEAD with v2 OWE / BSS selection patches). Driver
>> is brcmfmac (NXP 6.1.36 kernel) and chip is BCM4339 (Laird LWB5).
>>
>> It happens in a) single router environment (WPA2-PSK; Touchstone
>> TG3442DE), and b) router + repeater environment (WPA2 CCMP; Fritz!Box
>> + Fritz!Repeater), and maybe also in the WPA3 OWE Transition network
>> (yesterday lost a connection again).
>
> I lost now again 2 of 10 devices in the WPA3 OWE network (with
> roaming). However, now they don't disappear all after a shorter while.
> It seems to be later.
>
> I also lost one device in a Router+Repeater WPA2 (CCMP) network. It is
> confirmed here on router side, that the device is disconnected. Since
> more than a day.

We can't do anything without logs. If you suspect its the blacklist you
can lower the blacklist time down in main.conf:

[Blacklist]
MaximumTimeout=5

But logs would be best, we would be able to see if that is whats
happening or if its something else.

Thanks,

James

>
>>
>> We have 100% reproducable builds, test environments (testing sites),
>> and web socket-based telemetry. Thus my feeling is, there is still
>> something wrong with the BSS selection (maybe blacklisting)! Of
>> course this can also be something about the driver (brcmfmac) or
>> firmware (roaming?). Or can this be about IPv6 disabled (my
>> configuration below)?
>>
>> This is really really serious, I (still) lose connections to devices!
>>
>> I will investigate further and provide logs later today, if possible.
>>
>> SETUP:
>>
>> SoM: Variscite DART-IMX8M-PLUS
>> SoC: NXP i.MX8M Plus
>> Wi-Fi Chip: Laird Sterling LWB5 (Infineon CYW43353)
>> Antenna: Laird FlexPIFA
>> RootFS: Debian bookworm
>> Kernel: NXP Kernel 6.1.36 (with Variscite patches)
>> Driver: brcmfmac (from Kernel, only minor patches - device tree)
>> Firmware: Laird 12.29.0.22 (loaded via scripts)
>> Network Daemon: systemd-networkd 252.30
>> Wi-Fi Daemon: IWD 2.22+ (c459dc75c080dcbff6f9b9389344e11328dec411 +
>> OWE and BSS selection patches) + ELL 0.69
>> (7bed251f8020ef896043f008276f41cd13fdd43f)
>>
>> KERNEL:
>>
>> REPOSITORY=https://github.com/tavla/linux-imx.git (fork from
>> https://github.com/varigit/linux-imx)
>> BRANCH=lf-6.1.y_var03
>> COMMIT=a4b3cc1dbbb396284e501b938aa79d2dfd4f1a98
>>
>> FIRMWARE:
>>
>> summit-lwb5-etsi-firmware-12.29.0.22.tar.bz2
>>
>> From:
>> https://github.com/LairdCP/Sterling-LWB-and-LWB5-Release-Packages/releases/
>>
>> IWD
>>
>> -----
>>
>> [General]
>> EnableNetworkConfiguration=true
>>
>> [Network]
>> NameResolvingService=systemd
>> EnableIPv6=false
>>
>> [DriverQuirks]
>> OweDisable=brcmfmac
>>
>> -----
>>
>> Best regards,
>>
>> Martin
>>
>>