[Bug 197327] radeon 0000:01:00.0: failed VCE resume (-110).

https://bugzilla.kernel.org/show_bug.cgi?id=197327

--- Comment #1 from Michel Dänzer (michel@daenzer.net) --- (In reply to Alex from comment #0)

I have error message radeon 0000:01:00.0: failed VCE resume (-110) in boot time,

That looks harmless.

and i think my discrette card Radeon HD 8750M possibly not work (3D with DRI_PRIME=1 gives a worse or the same FPS than without it)

In which test? Something simple like glxgears isn't suitable for this (the inter-GPU overhead dominates the actual rendering work), try something GPU heavy like a Unigine demo.