I had tried a few more mainline kernels earlier today, including 4.4-rc1, before I saw your post. The results:
mainline-4.3.1-40301 OK
mainline-4.3.6-40306 OK
mainline-4.4.0-040400rc1 Fails
So it is looking like the problem was introduced in the transition from the last 4.3 kernel to the first 4.4 ones. Is it possible to do a git bisect on that somehow?
I had tried a few more mainline kernels earlier today, including 4.4-rc1, before I saw your post. The results:
mainline- 4.3.1-40301 OK 4.3.6-40306 OK 4.4.0-040400rc1 Fails
mainline-
mainline-
So it is looking like the problem was introduced in the transition from the last 4.3 kernel to the first 4.4 ones. Is it possible to do a git bisect on that somehow?