Not quite sure how to describe this... I've been going through the screensavers that are available in Mint Linux 19. Many of the 3D screensavers appear to have "inside out" images. I'm not sure if this is affecting other software.

Does anyone know why this is happening and how to fix?

[edit] I should mention that I'm using the nVidia 390.77-0ubuntu0.18.04.1 display driver [/edit]

Some examples:

Atunnel: I can see the far end of the tunnel overlapping the closer portions of the tunnel.
Flying Toasters: The slots in the toasters appear on the outside.
Gears: The teeth on the center gear are overdrawn with the middle of the gear.
Geodesic: The far portions of the ball are overdrawn on the near portions of the ball.

I've tried to get some screenshots of the screensavers. Hope they are clear enough


Atunnel:
https://i.imgur.com/k7PEm6O.png


Flying Toasters:
https://i.imgur.com/reSUCeu.png

i guess it's those screensavers that make use of your GPU directly; openGL or GL comes to mind.
i'm far from an expert here, but you should see if the appropriate gl packages for your gpu & driver are installed & up-to-date.
can you recreate this anywhere else? games?
i'm sure it is harmless per se.

looks like some kind of optical illusion for me. Do you have any special settings?

I'm not much of a gamer, so I haven't noticed any issues in other software.

I haven't been offered any updates for OpenGL.

I haven't changed any settings that I can think of. If it ain't broke, don't fix it!

It's not the end of the world. I am curious if other people see the same thing though.

you mention you use the proprietary nvidia driver, and version 390 suggests a rather new card.
this driver should have some accompanying packages that provide GL stuff.

are you sure that the appropriate version of both the driver & these packages is installed?

to make sure, please use the method described here, do not jsut trust the additional drivers utility.

missing or wrong colors?

Bringing that dislplay driver is the best practice as ondoho has suggested.

The nVidia 390.77 driver has been updated/upgraded to 390.87:-

https://www.nvidia.com/object/unix.html

This is a 4GB GeForce 1050Ti Pascal card.


I've updated to the version 415.13 of the nVidia drivers, at least according to the Driver Manager. There was no change in the screensavers behaviour.



The link provided has a lot of information. I'm going to have to review it to see what is relevant.

More like layers in the wrong order.

If I knew well that is (was) called z-order (something like a 3rd axis) and looks like its direction is reversed somehow. But it does not help a lot. Probably a driver compatibility issue.