(Thanks David and Alexandru ,for verifying that -ckt4 doesn't help.)
I've prepared a new test kernel: http://kernel.ubuntu.com/~kamal/lp1548587.1/
(For reference this is v4.2.0-30.35 with fc93712 "drm: Fix an unwanted master inheritance v2" reverted).
(Thanks David and Alexandru ,for verifying that -ckt4 doesn't help.)
I've prepared a new test kernel: http:// kernel. ubuntu. com/~kamal/ lp1548587. 1/
(For reference this is v4.2.0-30.35 with fc93712 "drm: Fix an unwanted master inheritance v2" reverted).
Please test!