I have reviewed the kernel source code that was committed between the Ubuntu-4.10.0-21.23 and Ubuntu-4.10.0-22.24 and I believe commit b93843fcde501b92647777ac5dbe2c980eb0b479 introduced bug #1697556.
In the light of this I believe that Thierry Reding <email address hidden> and Stefan Bader <email address hidden> would be the best people to look into this.
BTW, as it was not mentioned so far, Dell XPS 15 (9560) uses Intel HD 630 NVidia GeForce GTX 1050 with 4GB GDDR5.
I have reviewed the kernel source code that was committed between the Ubuntu-4.10.0-21.23 and Ubuntu-4.10.0-22.24 and I believe commit b93843fcde501b9 2647777ac5dbe2c 980eb0b479 introduced bug #1697556.
Commit b93843fcde501b9 2647777ac5dbe2c 980eb0b479 corresponds to https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1687045
In the light of this I believe that Thierry Reding <email address hidden> and Stefan Bader <email address hidden> would be the best people to look into this.
BTW, as it was not mentioned so far, Dell XPS 15 (9560) uses Intel HD 630 NVidia GeForce GTX 1050 with 4GB GDDR5.