General Wayland plans

Registered by Chris Halse Rogers on 2011-04-29

Wayland offers a lot over the existing Xserver, and Bryce has done all the work that needs to be done to get it in Universe. Can we run X on Wayland, what are the prerequisites for depending on Wayland, and what needs to be done to get there?

Blueprint information

Martin Pitt
Chris Halse Rogers
Needs approval
Chris Halse Rogers
Series goal:
Not started
Milestone target:
Completed by
Martin Pitt on 2012-05-15

Related branches



Work items for ubuntu-11.10:
[bryce] Merge with Debian's wayland/wayland-demos packages: done
[bryce] Upload new Wayland protocol snapshot, dropping hard-dep on cairo-gl: done
[bryce] File MIR for wayland: done
[raof] Enable libwayland-egl in mesa 7.11 (requires wayland in main): done
[sarvatt] Include wayland in xorg-edgers: done
[bryce] Upload new Wayland demos snapshot (requires libwayland-egl): done

Work items for ubuntu-12.10:
[raof] Check that the X server in the archive can run as a Wayland client:
[bryce] Update Wayland snapshot:
Write/convert a trivial Wayland compositor:
[robert-ancell] Modify LightDM to support a wayland-local seat type:
Extend trivial Wayland compositor to act as PolicyKit authenticator:
Extend trivial Wayland compositor to act as screensaver/lock screen:
Add a desktop session to start a Wayland session:
Smoke test of some sort:

These are all targets of opportunity; we don't expect to do anything serious with Wayland until after the 12.04 LTS, but would like to prepare for those changes.

The Wayland transition path that we see is:
• Running Wayland as an X client, so that Wayland clients may be tested.
• Using Wayland demo-compositor + a LightDM greeter to start user's X sessions
• Using a LightDM wayland-compositor greeter to start X as a client of the LightDM compositor
  ∘ At this point the LightDM compositor can provide useful features - a trusted environment for the screensaver/unlock/authentication dialogues, fancy user-switching, and running X with the user's credentials.
• Using a LightDM wayland-compositor greeter to start a Unity wayland-compositor with a rootless X server.
  ∘ Can now support native Wayland clients.

2011-07-19 bryce: The spec is blocked waiting on MIR #810217 now. Don't think we can easily do much more until that clears. [Done]

2011-07-20 pitti: I didn't remove the work item, I just replaced it with a linked bug; it'll still appear as a WI in the tracker that way, but it will auto-update its status according to the bug.

2011-08-10 bryce: wayland-demos packaged and uploaded. Seems relatively easy to crash, but it works.

2011-11-16 robert-ancell: Merging in changes from


Work Items