Screen flashes but not in Gnome or Cinnamon

[O. Sinclair]

On 30/08/2016 08:41, use r wrote:
> Hi
>
> What type of monitor is it? Or is it you laptop monitor.
>
> Regards
> Kris
>
>
>
>> On 30 Aug 2016, at 02:42, Richard Barmann <reb at barmannsbar.com> wrote:
>>
>> When I open Kubuntu 16.04 64 Bit I get flashes across my monitor,
>> Sections cut out, and a streak from top left to bottom right. When I
>> open one of the three Flavors, (Gnome, Cinnamon, or Mate) it is as pure
>> as can be. I have no problem when in one of the other Flavors.
>>
>> Dick Barmann
>>
>>
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>
i am seeing the same on Kubunu 16.04 with all updates including 
backports. Intel graphics, laptop monitor. It starts totally random, as 
far as I can "see"