Re: brcmfmac4356-pci device not seeing 2.4Ghz channel 12 and 13

On 06-07-17 21:23, Hans de Goede wrote:

Hi,

On 28-06-17 14:35, Arend Van Spriel wrote:

quoted

Op 28 jun. 2017 12:07 schreef "Hans de Goede" <hdegoede@redhat.com
<mailto:hdegoede@redhat.com>>:
 >
 > Hi,
 >
 > I noticed today that my GPD Win (x86 clamshell mini laptop)
 > which uses a brcmfmac4356-pci wifi does not see an APs which
 > is using channel 13.
 >
 > I've tried updating brcmfmac4356-pci.txt changing "ccode=US"
 > to "ccode=EU" and then rebooted, but that does not help.

Some variables may be stored on the device. However, EU may not be
valid. Could you try NL instead?

Yes changing it to NL fixes this. This is still a bit problematic
though. Because what are we going to put in the nvram file we want
to put in linux-firmware ?

Agree. I am surprised (not pleasantly) that these devices are not
properly programmed and thus need nvram for the country code.

quoted

 > I believe that the Linux wifi stack is supposed to automatically
 > figure out the country settings based on AP provided info ?

That depends. The device runs its own wifi stack which should have
802.11d support for what you describe.

 > But that does not seem to be working here ? Any hints on howto
 > debug this further would be appreciated.

You could try doing "country" iovar get somewhere in
brcmf_bus_started() to check country setting in firmware.

Let me know if you still want me to do this given that ccode=NL fixes this.

Well. Could you try it with ccode commented out in nvram file.

Regards,
Arend