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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [hsw] corruption after resuming from hibernation"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80773#c18">Comment # 18</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [hsw] corruption after resuming from hibernation"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80773">bug 80773</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>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);</pre>
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