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drm/i915: give up on 8xx lid status 

These old machines more often than not lie about their lid state.  So
don't use it to detect LVDS presence, but leave the event handler to
deal with lid open/close, when we might need to reset the mode.

Fixes kernel bug #15248

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: stable@kernel.org
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Jesse Barnes 2010-02-12 09:30:00 -08:00 committed by Eric Anholt
parent f590d279eb
commit 7b9c5abee9
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/i915/intel_lvds.c
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@ -648,8 +648,15 @@ static const struct dmi_system_id bad_lid_status[] = {
*/
static enum drm_connector_status intel_lvds_detect(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
enum drm_connector_status status = connector_status_connected;
/* ACPI lid methods were generally unreliable in this generation, so
* don't even bother.
*/
if (IS_I8XX(dev))
return connector_status_connected;
if (!dmi_check_system(bad_lid_status) && !acpi_lid_open())
status = connector_status_disconnected;