Comment 34 for bug 1818134

@vandebo, your apport information shows the following:

ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-77-generic.efi.signed root=/dev/mapper/kubuntu--vg-root ro quiet splash nomdmonddf nomdmonisw vt.handoff=7
ProcVersionSignature: Ubuntu 3.16.0-77.99~14.04.1-generic 3.16.7-ckt27

That appears to be the last released version of the linux-lts-utopic kernel. That kernel is out of security support and has not been updated since 2016. You should upgrade to linux-lts-xenial immediately by installing the linux-signed-generic-lts-xenial package.

@Lurchman, your comment also shows that you are running 3.19.0-82-generic, which is the last released version of the linux-lts-*vivid* kernel, which is also out of security support and has not been updated since February 2017. You should also install linux-signed-generic-lts-xenial immediately.

Please report if you are still experiencing issues once you have a currently-supported version of the kernel on 14.04.