Radeon 3650HD laptop LVDS lid open/closed detection problem

[Pasi Kärkkäinen]

On Sun, Sep 19, 2010 at 03:25:47PM +0300, Pasi Kärkkäinen wrote:
> > > 
> > > so "/proc/acpi/button/lid/LID/state" seems to work properly on my laptop,
> > > 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 happens 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 loaded, 
and *before* plymouth is started (and then sleep for some time so that I have 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