Re: nm 1.8.2 problem bring up wifi interface

[Belisko Marek <marek belisko gmail com>]

Hi,

On Mon, Nov 27, 2017 at 5:47 PM, Beniamino Galvani <bgalvani redhat com> wrote:
> On Sun, Nov 26, 2017 at 09:28:11PM +0100, Belisko Marek wrote:
> > Hi,
> >
> > I'm trying to use for my project networkmanager. I've build image
> > using yocto with nm v1.8.2. On my HW I'm using SDIO wifi chip
> > (esp8089) which I can operate with wpa_supplicant and simple config
> > file. When try to use it with networkmanager nmclo device show wlan0
> > as unavailable. When checked logs it seems that wpa_supplicant cannot
> > bring interface up because somebody else is trying to do the same.
> > I've added process name to kernel driver code (can be seen in kernel
> > messages like: esp_op_add_interface interface 2 requested by -
> > NetworkManager - 231). When looking through log it seems that nm is
> > trying to add wireless interface but also wpa_supplicant which then
> > driver refuse as max interfaces is 2 (also not sure what it means).
> > Anything else I can check or how to workaround this probem? (when
> > using raspbian wifi with nm works fine).
>
> Hi,
>
> it seems the driver gets confused by the MAC address change:
>
>   kernel: [    9.476452] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
>   kernel: [    9.482897] esp_op_add_interface interface 0 requested by - NetworkManager - 231
>   kernel: [    9.490304] esp_op_add_interface STA
>   kernel: [    9.495224] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
>   NetworkManager[231]: <info> [1511649658.0166] device (wlan0): set-hw-addr: set MAC address to 
> 26:2F:1A:C7:05:F4 (scanning)
>   kernel: [    9.504764] esp_op_add_interface interface 2 requested by - NetworkManager - 231
>
>
> Perhaps you can try disabling the randomization of MAC address during
> scans; add the following to /etc/NetworkManager/NetworkManager.conf
> and restart the service.
yes this does the trick. Now it works fine. Thanks a lot.
> [device]
> wifi.scan-rand-mac-address=no
>
> Beniamino

BR,

marek

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Marek Belisko - OPEN-NANDRA
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