[Spice-devel] [PATCH x11spice 00/10] Provide a simulated set of outputs and crtcs

[Jeremy White]

The spice-video-dummy driver has two flaws.  First, by not providing
a crtc, we take the Present extension into a code path where it
simulates a refresh rate, and the simulated rate is 1Hz.

Applications that query and use that rate then perform badly.
You can see that most easily with glxgears.

Second, you cannot dynamically resize our dummy driver.

By adding a simulated set of outputs and crtcs, we give the dummy
driver the ability to control the refresh rate and to allow
dynamic resizing.