Ubuntu added a 4.9.0 kernel yesterday (4.9.0-040900-generic_4.9.0-040900.201612111631_amd64.deb) in the mainline kernel ppa. This kernel does not have the problem on my Surface Pro 3.
Ubuntu added a 4.9.0 kernel yesterday (4.9.0- 040900- generic_ 4.9.0-040900. 201612111631_ amd64.deb) in the mainline kernel ppa. This kernel does not have the problem on my Surface Pro 3.