OK, then one of the three reverts must be the culprit. One step forward. I'm now building three different test kernels, reverting one by one. They will be found in OBS home:tiwai:bsc1198565-1, home:tiwai:bsc1198565-2 and home:tiwai:bsc1198565-3 repos. Could you try each one and identify which one works later?