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

Martin Petzold
2024-10-25T12:01:16Z

Hi James,

Am 25.10.24 um 13:48 schrieb James Prestwood:
> 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.
>
I will provide logs at 17:30 CET. Hopefully they go far enough back.

>>
>>>
>>> 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
>>>
>>>
>