improved swap/MSC-wait scheduling in DPMS-off state

Michel Dänzer michel at
Tue Apr 30 02:16:46 PDT 2013

On Son, 2013-04-28 at 16:07 -0400, Ilija Hadzic wrote: 
> No new functionality is needed from X-server or any other library
> except one #define in libdrm which should go into libdrm anyway
> (it was sent to dri-devel list but has not been merged yet [4]).

That change needs


or a dependency on a released version of libdrm with the definition.

> The end result is that regardless in which state the display is, the
> application sees the events (time and sequence numbers) that progress
> as if the CRTC is running and the events happen at right time points
> on the grid determined by the vlbanks (real or interpolated).

Indeed, looks like DPMS off no longer has any effect on piglit
results. :) Thanks for working on this. 

Earthling Michel Dänzer           |         
Libre software enthusiast         |          Debian, X and DRI developer

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