No DHCP on 3.0 beta – petrockblock

This topic has 7 replies, 3 voices, and was last updated 10 years, 6 months ago by vincegun.

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03/29/2015 at 11:28 #93028

vincegun
Participant

I follow this (http://www.andreagrandi.it/2014/09/02/how-to-configure-edimax-ew-7811un-wifi-dongle-on-raspbian/) guide to connect my RPi1/2 to my network and it always works flawlessly.

I just installed the 3.0 beta to try on my RPi2 and now it doesn’t seem to want to get an IP address.

I get the following lines while it tries to connect to my Netgear R6100. Mind you, this hasn’t happened before.

————————————————————————-
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3
No DHCPOFFERS received
No working leases in persistent database – sleeping
Done.
————————————————————————-

The first line will repeat 4-6 times with different numbers after “interval” each time. This seems like a bit of a bug. Can anyone reproduce it?

03/29/2015 at 13:21 #93038
max0r
Participant
```
# /etc/network/interfaces
auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
auto wlan0
iface wlan0 inet dhcp
    wpa-ssid "YOUR SSID"
    wpa-psk "YOUR PSK"
iface default inet dhcp
wireless-power off
```
This is all I did to configure my wifi. But i didn’t use the retropie-3.0 sd card image, I installed retropie binaries with the setup script on a fresh raspian from 2015-02-16.
Does your wifi dongle work? Check with iwlist wlan0 scan. Have you tried using a static ip?
03/29/2015 at 14:39 #93042

vincegun
Participant

Yes, it works. It’s the same one as in the link I provided. The Edimax ew-7811un.

After the system boots it just sits there and the led blinks on and off regularly a few times, then stops, then starts again. Over and over.

I haven’t tried a static IP and I wouldn’t know how to set one on this system. I’ve only ever used the raspbian wifi scan tool or the modified /etc/network/interfaces to just automatically grab one.

03/29/2015 at 15:42 #93046
max0r
Participant
You can try a static ip with
```
# /etc/network/interfaces
auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
auto wlan0
iface wlan0 inet static
    address 192.168.0.2
    netmask 255.255.255.0
    gateway 192.168.0.1
    wpa-ssid "YOUR SSID"
    wpa-psk "YOUR PSK"
wireless-power off
```
03/30/2015 at 00:29 #93093

vincegun
Participant

Thanks for that info. I have to go to work soon (damned third shift), but I’ll be trying this as soon as I’m able.

04/03/2015 at 02:13 #93600

vincegun
Participant

Finally got around to trying this. It seemed to half work. The unit took the IP that I gave it, but I couldn’t connect to it via winscp.

04/04/2015 at 01:30 #93693

petrockblog
Keymaster

did you reboot your router just to make sure ? I know it’s obvious, but worth checking at least.

DHCP does work on the latest image as I use it myself. Nothing specific to retropie has been changed in regards to dhcp from raspian. Could be some new incompatibility with latest kernel and your wireless chipset of course.

04/04/2015 at 04:06 #93703

vincegun
Participant

I’ll try that when I’m able, thanks.
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