I have the same problem. I bought a Pavilion 15 with an R5 integrated card and a R7 m260 dedicated card, within a Windows 8.1 OS enviroment, and after all HP expert recommendations (and support) i cant use my R7 when i run heavy graphic apps like games (Blizzard games, LOL, and many others used as benchmark). I check my R7 with AMD monitor, and GPU-Z and my card just dont work. I read this problem in many forums without solution.
My question is: ¿HP tech staff know about this problem and they cant fix it, or they just advice us follow a protocol and wasting our time, without trying to undesrtand their customers needs?
I can help: Win 8.1 just dont work properly with the switchable cards, and the AMD catalyst attempt to manage both cards just ends using the integrated (or none) card when run games.
We can hope a fix in Win 10 for 29th July? I don`t think so.
HP and all manufacturers need to confront the problem and stay true with us, their beloved customers.
I'll keep waiting for my invested money in my partially useless laptop (my phone and my tablet works as well checking my mail, and they run games and apps better than my 1000 USD computer. I just cant believe it)