On 04/30/2017 01:17 PM, Thierry de Coulon wrote:
> 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
>
Default desktop, TDE with a kdm start  using built in screen.  For file 
manager I always use Konqueror.

I seems like I had opened a program and
  closed it before it was all loaded but don't remember which app it was.

Dave