Explanation about RCs: I managed to test 3.5 mainline kernel successfully and bug is confirmed there. I couldn't test any 3.5-RC (1-7) version because something is corrupt so gpu acceleraton and hdmi audio (mouse and wlan too) are not working on RCs. So I can't bisect the specific version where bug apeared between 3.5-RC1 and 3.5 mainline.