Published at LXer:

The X Window System is old, but it works. Many distros including Ubuntu, had been headed toward the use of Wayland as an alternative Linux display technology. Though apparently Wayland is not good enough for Ubuntu anymore. "The traction that Ubuntu Touch is creating is great and the team is happy with where this is leading us," Ubuntu Developer, Oliver Ries wrote. "However, in order to implement the vision of converged devices, some changes to our Display Stack are necessary. After thorough research, looking at existing options and weighing in costs & benefits we have decided to roll our own Display Server, Mir."

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