Radeon 3650HD laptop LVDS lid open/closed detection problem

[Pasi Kärkkäinen]

On Mon, Jul 12, 2010 at 01:37:28PM -0400, Alex Deucher wrote:
> >> >>
> >> >
> >> > The other patch (0001-drm-radeon-kms-fix-shared-ddc-handling.patch) applied
> >> > my system mostly works now, but here's a summary about the problem I still have
> >> > with the lid detection:
> >> >
> >> > - I boot up the laptop with lid closed (LVDS inactive) so there's only external
> >> > DVI display connected. Kernel boot messages show up on the external DVI display,
> >> > and GDM login prompt appears on the external DVI display. All fine so far.
> >> >
> >> > - The actual problem: when X starts gnome panel etc show up on the internal LVDS
> >> > display, which I can't see at all since the lid is closed! So those should go to the
> >> > external DVI display only.. LVDS should be disconnected or inactive or something..
> >> >
> >> > Any pointers appreciated where to look at in the source.. I can do some debugging.
> >>
> >> Your desktop session manager should check the lid status when it loads
> >> and attempt to do the right thing if there is an external monitor
> >> detected.
> >>
> >
> > Ok.
> > So you think it's not a bug in the lid detection?
> 
> Not sure.  That's handled by apci, not the video driver.  You can
> check it the lid is producing proper events by running:
> cat /proc/acpi/button/lid/LID/state
> with the lid open and closed.  The desktop manager decides what the
> policy is for the lid (blank display, suspend, turn off the connector,
> etc.).  It should also take into account other connected outputs, but
> I don't think it handles that too well at the moment.
> 

Yes, the lid acpi stuff seems to work:

lid closed:
$ cat /proc/acpi/button/lid/LID/state 
state:      closed

lid open:
$ cat /proc/acpi/button/lid/LID/state 
state:      open

I also verified that the initial lid state is "closed" when 
the lid has been closed all the time during system startup 
and only external DVI display is in use. 

(I modified /etc/rc5.d/S01sysstat to sleep+print+sleep 
so I can check it during system startup before X starts).

When the lid is closed xrandr says "LVDS connected", is that correct? 

I think LVDS actually is ON when lid is closed, since I can immediately 
see everything when I open the lid.. correct colors etc.

So what's the component I should start looking at.. gnome-power-manager? 
or something else? 

Actually.. I just noticed that already in GDM prompt the internal LVDS
gets enabled/turned on, even when the lid is closed.. I think.

-- Pasi