I am using a Dell Inspiron 7520. I have a AMD Radeon HD 7730m working in switching with an Intel HD 4000. I have the lastest drivers from AMD so my switching is working flawlessly. I have made some script described in another post :
sleep 5 && echo "min_power" | tee /sys/class/scsi_host/host*/link_power_management_policy
usually, I am using
echo "min_power" | tee /sys/class/scsi_host/host*/link_power_management_policy
It worked fine with the open source graphic driver but right now on the performance GPU my fan is always running. It is good for the hardware but not for me after a while.
P.S I don't know if it could be of any use, I run my interface with gnome classic, I have installed gnome-shell then changed my interface from there to get more performance on EVE.