Comment 12 for bug 1928138

I guess you have some different issue. In my case HP Folio 1040 G1 had this that problem since kernel 4.1 and it was never fixed. But still you can analyze dmesg for anything suspicious (maybe try it with different kernels)
Here's a command to output information into dmesg.log in your home folder.
sudo dmesg > ~/dmesg.log