Screen not repainting

[ToddAndMargo]

On 04/03/2016 01:41 AM, Olivier Fourdan wrote:
> On 2 April 2016 at 19:29, ToddAndMargo <ToddAndMargo at zoho.com
> <mailto:ToddAndMargo at zoho.com>>wrote:
>
>     On 04/02/2016 03:55 AM, Ernest Adrogué wrote:
>
>         2016-03-30, 10:47 (-0700); ToddAndMargo escriu:
>
>             By chance are you using GLSideshow?  I was and changed to
>             Bouncing Cows and the symptom went away.
>
>
>         No, I run xscreensaver in "blank screen only" mode, and "lock
>         screen" after
>         10 minutes.
>
>         It only happens rarely though, maybe last time I saw it was a
>         month ago.
>
>
>     I set time out to 1 minute and bouncing cows.  It took about 50 shots
>     reproduce.  glsideshow takes about two shots
>
>
>
> ​Do you have the compositor enabled?
>
> Go to "Window Manager Tweaks", select "Compositor" Tab, un-select
> "Display fullscreen overlay windows directly", does it make any difference?
>
> ​Cheers,
> Olivier​

No symptom change