[PATCH 2/2] compositor-drm: Force DPMS state to ON after drmModeSetCrtc()

Ander Conselvan de Oliveira conselvan2 at gmail.com
Tue Jun 4 06:24:05 PDT 2013

From: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira at intel.com>

The kernel is supposed to set this when drmModeSetCrtc() is called but
at least the i915 driver wouldn't do that in all cases. A fix for this
should be released with kernel 3.10, but we work around the issue in
older kernels by always forcing DPMS to ON when doing a mode set.

 src/compositor-drm.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/src/compositor-drm.c b/src/compositor-drm.c
index 27d4d02..45aa61f 100644
--- a/src/compositor-drm.c
+++ b/src/compositor-drm.c
@@ -588,6 +588,7 @@ drm_output_repaint(struct weston_output *output_base,
 			weston_log("set mode failed: %m\n");
+		output_base->set_dpms(output_base, WESTON_DPMS_ON);
 	if (drmModePageFlip(compositor->drm.fd, output->crtc_id,

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