Background disappears when running, file system inaccessible

[Volt]

After running the system for a while, the unity desktop background would disappeared at a random point (all sidebars, top tools pane, desktop).

When this happens:
- The current running applications can still be used, but accessing the file system on the terminal reports error.
- Editing and saving some currently opening files reports "read-only" mode error.

This bug happens every single while in my daily use. Using a lower-versioned kernel seems to escape the problem.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.8.0-49-generic 4.8.0-49.52~16.04.1
ProcVersionSignature: Ubuntu 4.8.0-49.52~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-49-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Apr 28 09:51:51 2017
InstallationDate: Installed on 2017-03-14 (44 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)

[Emiliano Vavassori (syntaxerrormmm)]

Confirming read-only access on disk with kernel versions 4.8.0-49 (linux-image-4.8.0-49-generic 4.8.0-49.52~16.04.1) and 4.8.0-51 (linux-image-4.8.0-51-generic 4.8.0-51.54~16.04.1). Downgrading kernel to 4.8.0-46 (linux-image-4.8.0-46-generic 4.8.0-46.49~16.04.1) does not show the issue.

My hardware is a Dell XPS 9550 with nve harddisk.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Emiliano Vavassori (syntaxerrormmm)]

Opened other bug report as I am not sure the issue here is identical. https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1688213