I also verified it on another XPS 13 with the same problem and kernel 4.4.0-29-generic fixed it.
@Cruz,
I sent the backport patches and I will change the tag. Thanks for reporting the bug and helping test the proposed kernel.
I also verified it on another XPS 13 with the same problem and kernel 4.4.0-29-generic fixed it.
@Cruz,
I sent the backport patches and I will change the tag. Thanks for reporting the bug and helping test the proposed kernel.