The Darktable Team finally announced the release of Darktable 2.0 today on Christmas Eve.
Darktable 2.0 has been ported to GTK+ 3. It features a new print mode, PDF exporting support, better HiDPI support, a new thumbnail cache, new image operations, new camera support, UI and scripting enhancements, and much more.
For more details, see the official announcement and watch the video:
How to Install Darktable 2.0 in Ubuntu:
The new release has been made into universe (proposed) repository for Ubuntu 16.04 LTS, so it can be installed directly from Software Center.
For Ubuntu 15.10, Ubuntu 15.04, Ubuntu 14.04, and their derivatives, you can install the 2.0 release via the team member’s PPA:
UPDATE: The 2.0 release has been made into the Stable PPA
1. Add PPA
Open terminal from Unity Dash, App launcher, or via Ctrl+Alt+T shortcut key. When it opens, paste below command and hit run:
sudo add-apt-repository ppa:pmjdebruijn/darktable-release
Type in your password (no visual feedback just type in mind) when it asks, and hit Enter to continue.
2. Upgrade Darktable through Software Updater, or run below commands one by one in terminal to update the cache and install/upgrade the software:
sudo apt-get update sudo apt-get install darktable
After installation, you may remove the PPA by launching Software & Updates -> Other Software tab. Or run below command in terminal:
sudo add-apt-repository --remove ppa:pmjdebruijn/darktable-unstable
Merry Christmas Everyone!