Mysterious graphic that makes ubuntu host unusable

[reader]

Peter Flynn <peter at silmaril.ie> writes:

>> 2021年4月24日(土) 2:33 reader <reader at newsguy.com>:
>>
>>
>> When I switch back to ubuntu zfs I sometimes find a full screen graphic
>> displayed.
>
> What is the graphic? Is this a photo or a design or a logo or what?

Sorry, I actually meant to include that info, but got so tangled up
trying to tell the story... I forgot to.

Seems to be different graphic maybe not every time but I've seen a
total of 3 different one so far.

2 were big blobs of various colors arranged inside of a soft sided
triangle with rouned corners.  Covered a good bit of the screen and was
A bit off center.  You might imagine it as an equilateral triangle
with 1 inch radius corners.  Filled with multiple bright colors

The various colors fill the triangle completely... no spaces in there.
So 2 were that triangle thingy but with different colors ... the
colors don't move or anything.

The most recent one resembles a sprayed out pile of railroad track but
with 3 long elements and many smaller cross elements instead of 2.

Arranged in a sort of pile at upper rightish then sprayed out onto the
screen in variouis directions... and with some perspective change
through the length of them.  Also multiple colors fading into each
other.

The track like one has lots of black screen showing thru

I will try to get a cell phone picture next time.  But hopefully it
won't happen too soon.. its quite a disruption to get the host usable
again.