Genymotion on Ubuntu 13.04 won't connect to virtual device

Question

I'm running Ubuntu 13.04. I've installed VirtualBox 4.3.6 and Genymotion 2.0.3. After installation, I downloaded the Galaxy S4 - 4.2.2 image, as well as a few others. All of them encounter the same problem: After clicking Play, I get the window for the virtual device, but then I get an error:

Unable to connect to your virtual device! Genymotion will now stop. Check your VirtualBox network configuration.

The VirtualBox network is configured like this:

• No NAT networks
• One Host-only Network, vboxnet0
  • Adapter
    • IPv4 Address: 192.168.56.1
    • IPv4 Network Mask: 255.255.255.0
    • IPv6 Address: fe80:0000:0000:0000:0800:27ff:fe00:0000
    • IPv6 Network Mask Length: 64
  • DHCP Server
    • Server Address: 192.168.56.1
    • Server Mask: 255.255.255.0
    • Lower Address Bound: 192.168.56.100
    • Upper Address Bound: 192.168.56.254

After hitting Play, I look in the genymotion-player.log and see the following related to networking:

Jan 10 00:51:12 [Genymotion Player] [Debug] "Name:            vboxnet0
GUID:            786f6276-656e-4074-8000-0a0027000000
DHCP:            Disabled
IPAddress:       192.168.56.1
NetworkMask:     255.255.255.0
IPV6Address:     fe80:0000:0000:0000:0800:27ff:fe00:0000
IPV6NetworkMaskPrefixLength: 64
HardwareAddress: 0a:00:27:00:00:00
MediumType:      Ethernet
Status:          Up
VBoxNetworkName: HostInterfaceNetworking-vboxnet0

...and, a bit later in the log:

Jan 10 00:51:12 [Genymotion Player] [Debug] "NetworkName:    HostInterfaceNetworking-

vboxnet0
IP:             192.168.56.1
NetworkMask:    255.255.255.0
lowerIPAddress: 192.168.56.100
upperIPAddress: 192.168.56.254
Enabled:        Yes

NetworkName:    NatNetwork
IP:             10.0.2.3
NetworkMask:    255.255.255.0
lowerIPAddress: 10.0.2.4
upperIPAddress: 10.0.2.254
Enabled:        Yes

Still later in the log:

Jan 10 00:51:13 [Genymotion Player] [Debug] Virtual Machine started. 
Jan 10 00:51:13 [Genymotion Player] [Debug] Waiting for an IP address... 

A couple of seconds later:

Jan 10 00:51:18 [Genymotion Player] [Debug] Genymotion system started. Attributed IP address:  "192.168.56.3" 

And then, when it fails:

Jan 10 00:51:24 [Genymotion Player] [Error] Unable to connect player to virtual machine: "192.168.56.3" 

I've tried other workarounds suggested:

• Uninstall / reinstall Genymotion
• Uninstall / reinstall VirtualBox
• Downgrade VirtualBox to 4.2
• Delete and redownload the device images
• Delete and allow Genymotion to recreate the host-only network

I also should state that I do not have a firewall, so I'm confident there's no issue arising because of interference.

Answer 1

Turns out the problem was that I'm running both VMWare and, to support Genymotion, VirtualBox.

I discovered this with help from the Genymotion support, who pointed out that when I run:

sudo netstat -nm

the result is something like:

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.100.2   0.0.0.0         UG        0 0          0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth0
172.16.30.0     0.0.0.0         255.255.255.0   U         0 0          0 vmnet1
192.168.56.0    0.0.0.0         255.255.255.0   U         0 0          0 vmnet8
192.168.56.0    0.0.0.0         255.255.255.0   U         0 0          0 vboxnet0
192.168.100.0   0.0.0.0         255.255.255.0   U         0 0          0 eth0

I was able to fix this by going into VirtualBox, and from the Network section of the Preferences dialog, I changed every reference to 192.168.56.* in the vboxnet0 configuration to 192.168.57.*.

THANK YOU Genymotion support team!