I installed the newest Linux driver 15.5 and found I cannot select graphics output by APU itself. It seems automatically select the first PCI-E device as default output.
APU: A10-7870K (main board supports APU GPU)
Devices: R9-295x2, HD 5870
Before I installed 15.5 diver, I choosed APU graphics output as the default output in BIOS settings and installed CentOS 7 x64_64 and it works well.
After I installed the driver, it changed to output on first PCI-E device.
I tried "aticonfig --px-igpu" but it doesn't work.
the result of "aticonfig --list-adapters" doesn't contain APU GPU, only PCI-E GPUs are seen. Why?
Can anybody provide solutions to use APU integrated GPU again with official driver?