[Bug 80773] [hsw] corruption after resuming from hibernation

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80773

--- Comment #18 from Jani Nikula <jani.nikula at intel.com> ---
Please provide dmesg from boot to suspend and resume, with drm.debug=14 module
parameter set, and this patch applied.


diff --git a/drivers/gpu/drm/i915/intel_panel.c
b/drivers/gpu/drm/i915/intel_panel.c
index e18b3f49074c..9c77afb571b8 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -968,8 +968,10 @@ static int intel_backlight_device_update_status(struct
backlight_device *bd)
        struct drm_device *dev = connector->base.dev;

        drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
-       DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n",
-                     bd->props.brightness, bd->props.max_brightness);
+       DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d, "
+                     "bl_power=%d, by %s\n",
+                     bd->props.brightness, bd->props.max_brightness,
+                     bd->props.power, current->comm);
        intel_panel_set_backlight(connector, bd->props.brightness,
                                  bd->props.max_brightness);

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