Comment # 16 on bug 965536 from Egbert Eich

(In reply to Dr. Werner Fink from comment #15)
> Created attachment 665277 [details]
> n_RandR-Disable-rotation-for-GPU-screens.patch
> 
> This is the source of the trouble

Werner, there is an update for this in the queue already. The lines:

diff --git a/hw/xfree86/modes/xf86Rotate.c b/hw/xfree86/modes/xf86Rotate.c
index 9c00a44..0334253 100644
--- a/hw/xfree86/modes/xf86Rotate.c
+++ b/hw/xfree86/modes/xf86Rotate.c
@@ -366,6 +366,9 @@ xf86CrtcRotate(xf86CrtcPtr crtc)
     RRTransformPtr transform = NULL;
     Bool damage = FALSE;

+    if (pScreen->isGPU)
+        return FALSE;
+
     if (crtc->transformPresent)
         transform = &crtc->transform;

Need to be removed. Please check the last comments in boo#962295.