Description

This test case tests external display outputs on hybrid graphics systems. It is only valid if run on a system with hybrid graphics.

Setup

Ensure your system has at least one external display connector, and you have a display (monitor) and appropriate cable to connect the two. The more outputs you can test, the better!
Clean boot the system, with no video-related kernel parameters or custom configuration

Connect a display to an external display connector, and check that it is initialized properly (with its native resolution) and the desktop extended to it
- If the display is not brought up automatically, you can run the Displays configuration tool (just Displays from the Overview, or gnome-control-center display) to configure it, and arrange it relative to the internal display
Check you can drag a typical application window (e.g. a terminal) to the external display and back
If suspend and resume usually works on the system, suspend the system with the external display connected, resume again, and check that the external display still works
Disconnect the external display
Repeat the above steps for as many connectors as you can test

When an external display is connected, the system should notice, initialize it at the correct resolution, and add it to the desktop configuration
- If not, it should at least appear in the display configuration tool and you should be able to set it up and add it to the display configuration manually
Dragging applications between displays should work smoothly
On resume from suspend, the external display should continue to function correctly