DocumentationSubstance 3DSubstance 3D Painter

Viewport appears broken or unresponsive on Ubuntu

Last update: April 7, 2026

When running Painter from Steam on Ubuntu starting with version 11.1, the viewport can appear broken or unresponsive.

This is is related to Painter not starting with the right GPU assigned to it. On Ubuntu the integrated GPU instead of the discreet one can end-up being selected. Painter inherits this configuration via Steam which can create issues.

A few solutions exists:

  1. Run Steam from a Terminal. This will force a different context and should make Steam and Painter run on the right GPU.
  2. Edit the Steam shortcut to disable the Run using dedicated graphics card setting. Then run Steam as normal.

For more information, see this github issue.

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