Not able to start Genymotion device

I am getting an error when I try to start Genymotion. It says

The Genymotion Virtual device could not obtain an IP address.For an unknown reason, VirtualBox DHCP has not assigned an IP address to virtual device. Run the VirtualBox software to check for issues

Can someone please tell me how to start it?

I had this same issue and here are the specific configuration that I needed to get this to work.

First, go to the VirtualBox preferences -> Network.

For the "Host-only Networks" tab, focus on the vboxnet0.

Click the icon on the left that looks like a screwdriver. For the Adapter tab, fill in the IPv4 Network Address as 192.168.56.1 Fill in the IPv4 Network Mask as 255.255.255.0

For the DHCP Server tab, select the check box for Enable Server to enable the server Fill in the Server Address as 192.168.56.100 Fill in the Server Mask as 255.255.255.0 Fill in the Lower Address Bound as 192.168.56.101 Fill in the Upper Address Bound as 192.168.56.254

The DHCP server part is what was not correct for me and it fixed my problem.

This worked for me..

Open Virtual Box and select your mobile VM. Right click->Settings

Change Promiscuous mode to Allow VMS and click ok

In virtualbox, go to the settings / network, and remove all host only networks. Make sure to go to the global settings of virtualbox, not the settings of your specific VM.

The settings screen should look like this:

Then restart your emulator in Genymotion.

I think you should configure your VirtualBox network adapter:

The adapter's IP address has to be in the same network (192.168.56.0/24 by default) as DHCP server's IP address and DHCP's IP address bounds. If all those addresses are not in the same network, then your Genymotion virtual device might not be able to start.

https://cloud.genymotion.com/page/faq/#collapse-blank

Or check log files to get a clue:

For each platform, the log files are stored here:
Windows Vista/7/8: C:\Users\USER\AppData\Local\Genymobile
Windows XP: C:\Documents and Settings\USER\Local settings\Application Data\Genymobile
Linux: /home/USER/.Genymobile
Mac: /Users/USER/.Genymobile

https://cloud.genymotion.com/page/faq/#collapse-logs