Connecting my Samsung Galaxy S2 to Windows 7 worked seamlessly. Now that I'm on Ubuntu 13.04 I'd like to access my phone's drive via the USB cable, but that's not working.

When I do plug it in I get a error message in Ubuntu:

Unable to mount SAMSUNG_Android Unable to open MTP device '[usb:002,008]'

Then when I unplug it I see a error message on the phone:

Attention Unable to find software on your PC that can recognize your device. Service pack 3, Windows Media Player, version 10 or higher, for Windows XP or Android FIle Transfer for Mac OS must be installed.

You can download and install PC Kies from http://www.samsung.com/kies in order to sync data with your device, back up data, and upgrade your device (Windows and Mac OS are supported)

What can I do here to fix this? I don't want to use any special software with the phone, just access the phone's drive.