For Darktable, I'm pretty sure all you'll need to do is install the nvidia-modprobe package after you activate the Nvidia drivers. It'll then work without any further ado. Let me know if that does the trick for you - it's been working for me over the past 3 Ubuntu releases, across 3 PCs.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1311362 Title: Ubuntu Gnome 14.04 - NVidia 331 - OpenCL broken (using Darktable) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1311362/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp