Proof that SNA was enabled during previous Xorg start:
$ sudo grep SNA Xorg.*
Xorg.0.log.old:[ 461.127] (II) intel(0): SNA compiled: xserver-xorg-video-intel 2:2.21.6-0ubuntu3 (Bryce Harrington <email address hidden>)
Xorg.0.log.old:[ 461.549] (II) intel(0): SNA initialized with Ironlake backend
Proof that UXA is enabled now:
$ sudo grep UXA Xorg.*
Xorg.0.log:[ 582.860] (II) UXA(0): Driver registered support for the following operations:
Proof that SNA was enabled during previous Xorg start: xorg-video- intel 2:2.21.6-0ubuntu3 (Bryce Harrington <email address hidden>)
$ sudo grep SNA Xorg.*
Xorg.0.log.old:[ 461.127] (II) intel(0): SNA compiled: xserver-
Xorg.0.log.old:[ 461.549] (II) intel(0): SNA initialized with Ironlake backend
Proof that UXA is enabled now:
$ sudo grep UXA Xorg.*
Xorg.0.log:[ 582.860] (II) UXA(0): Driver registered support for the following operations: