Comment 20 for bug 1280842

Daniel, I think the idea was that we have a method of knowing when a surface is ready to be shown today (the compositor can hook into surfaces to know when they have swap_buffer called on them). So USC can just wait for that to happen with a non-null buffer to know that the surface is ready.

So the requested enhancement exists today, assuming the 4-buffer bug is fixed. That's the motivation to tie that flaw to this bug report.

Granted, maybe there could be a more elegant way to implement the enhancement? But I mostly care about it being possible, not necessarily elegant.