The general problem is that the new kernel comes back at each upgrade of the ubuntu kernel, and a custom one needs installation for each. But yes bug #1630906 is still open.
Qt 5.7.1 and 5.6.3 (in March or so) will eventually have upstream fixes that hopefully work fully unlike the cherry-picks that had their own issues in my testing.
The general problem is that the new kernel comes back at each upgrade of the ubuntu kernel, and a custom one needs installation for each. But yes bug #1630906 is still open.
Qt 5.7.1 and 5.6.3 (in March or so) will eventually have upstream fixes that hopefully work fully unlike the cherry-picks that had their own issues in my testing.