The root filesystem images of Ubuntu MATE 15.04 for ARMv7 devices is available according to Martin Wimpres, the lead developer and co-founder of Ubuntu MATE project.
This new images is designed especially for some board manufacturers and ARMv7 maker. Now, they can use Ubuntu MATE on their desktop and also on their dev-board.
“The Ubuntu MATE team have made a generic Ubuntu MATE 15.04 root file system for ARMv7 devices,” says Martin Wimpress. “This root file system is intended for ARMv7 enthusiasts and board manufacturers who’d like to make an Ubuntu MATE image for their device(s).”
Detailed instructions and examples on how to build these Ubuntu MATE images for ARMv7 devices are provided on this link.