Raspbia, after a reboot, wifi is only working if a ethernet cable is attached

Question

my problem is that my wifi is only getting an IP address if ethernet cable is also plugged in. I have checked many sides, but the solution below is not working. (funny thing, I have reinstalled this pi, and before this, this problem was not present)

Maybe Have you any idea how to fix this?

RETTY_NAME="Raspbian GNU/Linux 10 (buster)"
pi@raspberrypi:~ $ more /etc/dhcpcd.conf | grep -v #
hostname
clientid
persistent
option rapid_commit
option domain_name_servers, domain_name, domain_search, host_name
option classless_static_routes
option interface_mtu
require dhcp_server_identifier
slaac private
allow-hotplug eth0  #(or with wlan0)
auto wlan0  #(or without)
interface wlan0
        static ip_address=192.168.178.99/24
        static routers=192.168.178.1
        static domain_name_servers=8.8.8.8 8.8.4.4
pi@raspberrypi:~ $ more /etc/wpa_supplicant/wpa_supplicant.conf
    ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
    update_config=1
    country=DE
    network={
            ssid="xxxxxx"
            psk="xxxxxxx"
    }

/edit

I have no access to the device when this problem happens

It’s plain simple direct local lan connection

Update

so i just have found out that the PI is getting the right ip, and my pc is getting the arp entry but the communication with the pi is not possible

You have provided no evidence; at least is ip a; ip r, failed to explain what is connected to what and you have put rubbish in dhcpcd.conf. Try following one of the established guides e.g. How to set up networking/WiFi How to set up Static IP Address — Milliways, Jun 14 '21 at 00:36
Is this a pi4 - if so, you wouldn't be the first to have this problem — Jaromanda X, Jun 14 '21 at 00:44

score 0 · Answer 1 · answered Jun 17 '21 at 23:19

0

If someone is interested- that problem was that the pi have even not booted without the cable

And it was caused due too a headless static ip entry Inside cmdline.txt - which I have used right before the first boot

answered Jun 17 '21 at 23:19

1v4n

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Raspbia, after a reboot, wifi is only working if a ethernet cable is attached

1 Answers1