From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= <pasik@iki.fi>
Subject: Re: Radeon 3650HD laptop LVDS lid open/closed detection problem
Date: Sun, 19 Sep 2010 17:56:07 +0300
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On Sun, Sep 19, 2010 at 03:25:47PM +0300, Pasi K=E4rkk=E4inen wrote:
> > > =

> > > so "/proc/acpi/button/lid/LID/state" seems to work properly on my lap=
top,
> > > but is there a way to monitor the state of the drm/kms outputs from /=
proc, /sys or from somewhere? =

> > > =

> > > I'd like to see the state before X is started, and verify what happen=
s when GDM is started etc.. =

> > > (ie. if outputs are enabled/active or not).
> > > =

> > =

> > Ah, found it:
> > =

> > $ ls /sys/class/drm/card0
> > card0-DVI-D-1        card0-LVDS-1  dev     power      uevent
> > card0-HDMI Type A-1  card0-VGA-1   device  subsystem
> > =

> > $ cat /sys/class/drm/card0/card0-LVDS-1/status =

> > connected
> > =

> > $ cat /sys/class/drm/card0/card0-LVDS-1/enabled =

> > enabled
> > =

> =

> So I added those to rc.local so that they get executed before GDM..
> and I booted up the laptop with the lid closed..
> =

> And the result was: lid state "closed", lvds-status "connected" and lvds-=
enabled was "enabled"..
> =

> Does that mean Fedora plymouth is doing it wrong,
> or is t possible the driver itself always enabled the lvds, even when the=
 lid is closed? =

> =


I did some more investigations. I'm currently using Fedora 13 Linux 2.6.34.=
6-47.fc13.x86_64 kernel.
I hacked the initrd image to echo debug stuff right after drm modules are l=
oaded, =

and *before* plymouth is started (and then sleep for some time so that I ha=
ve time to see the debug values.)

The result was this:

acpi lid/state: closed
lvds-1/status: connected
lvds-1/enabled: enabled

So to me it looks like the problem is in the driver itself..
lvds shouldn't get enabled (turned on) when the lid is closed..

-- Pasi