Bug#985632: firmware-brcm80211: [REGRESSION] RPi4B 5GHz WiFi stopped working with 20210208-4, 20201218-3 was fine

[maximilian attems <maks@stro.at>]

Dear Ryutaroh,

> It is Raspberry Pi 4B 8GB model.

I see thank you for all the dmesg.
 
> > please show affected dmesg output working and non working,
> > the difference between 20210208-3 20210208-4 is minimal,
> > hence it should be easy to find out what broke?
> 
> Not at all, unfortunately.
> 20210208-3 was completely broken on RPi4B as
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=984489
> 20210208-1 to 20210208-3 were broken...
> The last working version was 20201218-3, and I apt-mark-holded firmware-brcm80211.
> I unhold it in the weekend and found this issue.

please excuse my ignorance first, but are you sure that these
bootflags are still adequate for the latest cypress firmware?

concerning bluetooth unfortunately this seems missing firmware
in latest upstream firmware git (see #962038 ) or possible wget info
https://wiki.debian.org/RaspberryPi4#Bluetooth
 
> I attach dmesg of 20201218-3, 20210208-4, and 20210315-1.
> It was also interesting that installation of 20210315-1 causes boot failure
> and showed "Give root password for maintainance"...
> Should I file a separete report against 20210315-1?
> 20210315-1~exp1 was booted fine...

this should not be reproducible as 20210315-1 and 20210315-1~exp1 are
unchanged (just uploaded into experimental before unstable).
 
Thank you for your report!
maximilian