Radeon 3650HD laptop LVDS lid open/closed detection problem

[Pasi Kärkkäinen]

On Mon, Jun 21, 2010 at 02:51:59PM +0200, Jerome Glisse wrote:
> On Mon, Jun 21, 2010 at 03:31:19PM +0300, Pasi Kärkkäinen wrote:
> > Hello,
> > 
> > After fixing the dvi/hdmi detection problem I now have another problem
> > with the HP EliteBook 8530p, which has Radeon 3650HD adapter.
> > 
> > Here's a summary of the environment:
> > 
> > 	- laptop connected to a docking station.
> > 	- external display in use, connected with DVI to the dock.
> > 	- laptop lid closed, so internal LVDS display is not used.
> > 
> > Now, when I start the laptop, I can see the BIOS and grub on the external DVI display.
> > All fine so far. I select the Fedora 13 kernel, and Linux starts. I see the Fedora
> > graphical boot on the external DVI display, just like it should be. GDM login prompt
> > appears on the external DVI display, still everything fine.
> > 
> > And then it goes wrong. After I login to X, the external display only shows the background
> > picture.. it turns out the desktop stuff has been started to the internal LVDS display,
> > which shouldn't be used at all since the laptop lid is closed!! 
> > 
> > When the laptop lid is closed, and external display is connected, I want to use only the external display..
> > 
> > Any ideas how to troubleshoot this one? 
> > 
> > -- Pasi
> > 
> 
> It's better to open bug when you face issue rather than mail, as it's
> harder to track information in mail thread than in a bug. Your issue
> is not easily fixed because there is many laptop with broken acpi which
> report wrong lid status (some of them always report lid closed what ever
> is the lid status, other always report lid open, ... i am not expert on
> how broken this is but from what i have been told i should rather consider
> drinking than trying to look into it and then go to the drinking step).
> 

Hey, I'm from Finland, so drinking and debugging is not a problem ;)

> Bottom line is that lid detection is unreliable thus so far we ignore
> it silently. I think the plan is to monitor lid status change and if
> we detect change from either open to close or close to open then we
> can start assuming that acpi lid status is reliable and act accordingly.
> 

I hate to play the "windows card" but the lid detection seems to work in windows.. 
so there's a way to make it work :)

-- Pasi