I heard that 13.10 used a mix of Mir and X.Org. How about 14.04? Will it also be using both or just Mir. If its just Mir then how do we get official (not proprietary) drivers to work (by AMD)
X.org continues to be packaged for 14.04 Trusty Tahr, as evidenced by the
Also, I'm currently running Trusty on a VMware virtual machine and when I log in to a Unity desktop,
And this executable is provided by the
(To reproduce this, one may perform those steps or one may choose to look for
And for additional assurance that X.org is still present in Ubuntu 14.04 and remains the default display server:
As may be part of your motivation for asking this question, it's true there have been some concerns about driver support for Mir, with at least one major video vendor (Intel) having said they don't plan to support it. But X.org and Mir aren't the only display servers. In particular, it appears the Kubuntu project (the Ubuntu flavor with KDE as the default desktop environment) will be trying to adopt Wayland. Wayland already has significant support in commercial video drivers.
Rather than speculate wildly about what might happen, I want to limit the focus of this answer to what has happened, been developed, and been announced. (More subjective or speculative answers, or forum-like discussion, would be more appropriate on Discuss. Credit to onrea for suggesting that site.) But you may find useful information and news in some of the citations within this section of the Wikipedia article on Mir.