I tried the upstream kernel you linked to, but the problem is still the same.
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-rc6-wily/
$ uname -a Linux kaymes 4.6.0-040600rc6-generic #201605012031 SMP Mon May 2 00:33:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Btw, the kernel you linked to was for wily whereas this system is already xenial.
I tried the upstream kernel you linked to, but the problem is still the same.
http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v4.6-rc6- wily/
$ uname -a -generic #201605012031 SMP Mon May 2 00:33:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Linux kaymes 4.6.0-040600rc6
Btw, the kernel you linked to was for wily whereas this system is already xenial.