I have muxless laptop with intel hd 4000 + radeon 7750M. So physically there is no display connected to discrete graphic card. I have the following results of unigine tropics benchmark (1024x768 with all high settings):
intel hd 4000 22.7 fps
radeon 7750M (fglrx) 44.9 fps
radeon 7750M (radeonsi auto) 9.6 fps
radeon 7750M (radeonsi high) 24.1 fps
kernel 3.11.1 with dpm enabled
The rest is from today's git
With auto my radeon GPU is always in low state:
Only using high performance level helps me. In bug report 69395 you attached a patch. Will it help in my laptop's case?
uvd vclk: 0 dclk: 0
power level 0 sclk: 30000 mclk: 15000 vddc: 850 vddci: 900 pcie gen: 2
Also do you know what is the state of dynamic switching of discrete GPU? Dave merged nouveau patches for nvidia and his branch for radeons wasn't touched for three weeks. Is there a chance to have this support in 3.12 kernel?