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drm/i915: give up on 8xx lid status

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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;