Problem with Intel Wireless WiFi Link 4965 on APU2, FreeBSD 12

[Hans-Christian Esperer]

Hi all,

I'm running an APU-2 SoC with FreeBSD 12 stable and an Intel Wireless WiFi Link
4965 micro PCI card.

/boot/loader.conf has the following lines:
    if_iwn_load="YES"
    iwn4965fw_load="YES"

When creating and upping the wifi device with ifconfig, I'm getting the
following messags in dmesg:
    iwn0: <Intel Wireless WiFi Link 4965> mem 0xfe500000-0xfe501fff at device 0.0 on pci1
    [...]
    iwn0: timeout reading ROM at 0x48
    [...]
    iwn0: timeout reading ROM at 0xe9
    iwn0: iwn_read_firmware: ucode rev=0xe43d0218
    iwn0: iwn_send_rxon: could not set TX power, error 22
    iwn0: iwn_config: could not send RXON
    iwn0: iwn_init_locked: could not configure device, error 22

The adapter doesn't work. Switching channels doesn't work:
    # ifconfig wlan0 channel 6
    ifconfig: unknown/undefined channel number 6 flags 0x0

Scanning for access points doesn't work.

Any ideas/hints?

Thanks,
 HC