Dell D630 Docking Station and Gentooo Linux

Dell provides a nice docking station where the Dell D630 can be plugged on. But Linux kernel lacks support of this kind of hardware. Even if a "dock" ACPI module is existing in recent 2.6 kernels, it fails to provide ACPI events to acpid : it just have not been implemented in the kernel code :( The quick hack below send some crappy events to the ACPI event bus :

--- ../../../linux-2.6.22-gentoo-r9/drivers/acpi/dock.c 2007-10-31 17:30:44.000000000 +0100
+++ dock.c 2007-11-09 15:06:25.000000000 +0100
@@ -68,6 +68,8 @@

static struct dock_station *dock_station;

+static struct acpi_device device;
+
/****************************************************************************
Dock Dependent device functions
*****************************************************************************/
@@ -320,7 +322,7 @@
if (event == ACPI_NOTIFY_EJECT_REQUEST)
dock_remove_acpi_device(dd->handle);
else
- dock_create_acpi_device(dd->handle);
+ device = dock_create_acpi_device(dd->handle);
}
mutex_unlock(&ds->hp_lock);
}
@@ -333,6 +335,7 @@
changed.
/
kobject_uevent(&dev->kobj, KOBJ_CHANGE);
+ acpi_bus_generate_event(device, event, num);
}

/**


In Gentoo the event can be matched using the code extracted from my /etc/acpi/default.sh :

if [ $1 = "GDCK" ] ;then
export XAUTHORITY=/var/run/xauth/`ls /var/run/xauth/`
export DISPLAY=:0
if [ $2 = "00000000" ] ; then
logger "docking ?"
else
logger "undocking ?"
fi
exit;
fi


Unfortunately, this quick hack fails to detect the first "undock" event if the laptop is docked at boot time...