Comment 4 for bug 1488555

Hello,

please try using an Official Ubuntu supported kernel and reproduce this problem.

    ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.17.0-031700-generic

Don't use mainline kernels, they are not supported and they are used only for testing specific kernel features/bugs..etc.

http://askubuntu.com/a/162617

Regards
NickTh