Hello to everyone. I'm sorry for my English. I installed Ubuntu 16.04 LTS on my computer. I have two graphic cards, one is an Intel and the other one is a Radeon HD 6490. I have 8GB of Ram, and a i7 processor. I tried to install Krita, but is impossible for me to use, because the brushes are too slow. This is not the first time I use Krita, because I used it on Kubuntu in February and it worked fine. What can I do to use this software using my pc with a good performance? I need to switch distro? Maybe is a question related to drivers? I'm not an expert, but I would like to use my computer at the best of his possibility with this software, but for now is impossible. I would be very glad if someone could help me. Thank you very much with your patience.