3d models glitch in 3D view

Bug #1939348 reported by thejpster
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
kicad (Ubuntu)
New
Undecided
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Bug Description

OS: Ubuntu 21.04
Package: Kicad 5.1.9+dsfg1-1
CPU: 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz (with Intel Xe graphics)
Screen resolution: 2560x1600 @ 60 Hz
Display: X11, with default GNOME 3 (Wayland has the same issue)

When I view my PCB design in Kicad in 3D mode, various surfaces on the 3D models glitch on and off (appear transparent and then solid again). Adjusting the view very slightly might cause them to reappear, or they might change when panning, but then change back when panning stops. This exact board works fine on my other PCs (an aging Core 2 Duo with a Quadro 600, and an i3-7100U with Intel UHD graphics - both running the same Ubuntu and Kicad).

Kicad project you can try: https://github.com/Neotron-Compute/Neotron-Pico/commit/2a30b714678ae7cdd571d254cc3df3dd42722fe9

Screen-cap of issue: https://youtu.be/4aX5BPtca-E

I'm filing against Kicad, but this may well be a Mesa bug.

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