I hibernated my laptop a few times.

I closed the lid and reopened it.

This is what happened:

Empty Terminal

I cannot see anything but I can enter commands.

This is the nautilus window:

Empty nautilus window

How can I fix this problem without any reboot, logout or anything that leads closing the currently open application?

I welcome any terminal command.

  • Have you tried a clean reboot or shut down and back on? Hibernate on many devices isn't well supported on Linux... – Zanna May 4 '19 at 2:39
  • @Zanna, If I reboot or unity --replace, I am sure the problem will be solved. But, I do not want killing the currently open applications. – twist May 4 '19 at 2:42
  • I am sure this problem happens to others too. I has happened to me several times. I am curious how to fix it. I cannot reproduce this problem often. If you know the solution, please suggest me ASAP before I restart and loose the chance to verify if your method works. – twist May 4 '19 at 3:11

This is a known bug with Ubuntu 16.04. One possible fix seems to be upgrading to kernel 4.8 or higher. You can attempt to update your current kernel by running the command:

sudo apt install linux-generic-hwe-16.04
  • Many thanks, does it require rebooting? – twist May 4 '19 at 5:10
  • It may require a reboot once after the new kernel is installed, but the fix (if it works) should be permanent. – john kieran May 4 '19 at 20:11

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