LibreOffice Impress OpenGL transitions flickering only on Ubuntu Gnome

[Rafael Lima]

When I'm using the standard Ubuntu installation with Gnome DE, LibreOffice Impress transitions that require OpenGL do not work. To reproduce the bug:

1) Create a presentation using LO Impress
2) Add an OpenGL transition (e.g. Fade In)
3) Start the presentation
4) The transition will be flickering in a very weird manner

I am currently using Ubuntu 20.10 with Nvidia drivers and the gtk3 VCL plugin. However, this issue has existed since at least Ubuntu 19.10, which was when I first experienced it.

This is a long-standing bug that might to be related with the way drivers/OpenGL/Gnome are set-up on Ubuntu. See the following bug report on LibreOffice's Bugzilla page:

https://bugs.documentfoundation.org/show_bug.cgi?id=131610

The weirdest thing is that I also run Kubuntu 20.10 on the same machine and on Kubuntu all transitions work perfectly fine. That's why I think it may have something to do with Gnome on Ubuntu.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.