On Sunday 30 April 2017 16.36:34 dave wrote:
after dumping about 4 minutes of TOP to a file I found the culprit. Nautilus causes this background change. now the question How did this app start in the first place?
What is your default Desktop manager? Nautilus being the default file manager for gdm, I could imagine a link.
I've seen Gnome 3 bloquing TDE in some distributions. Maybe there is something like that with Ubuntu? As I don't run Ubuntu and don't have nautilus installed I never saw this behaviour.
Thierry