Problems writing an upstart job

[Wolfgang Holoch]

Hello everybody,

I am sorry to post this in the development list, because this is not a
development concern, but also not a bug to post it in launchpad, so this
was the last remaining place for me to find help.

Background
I am the owner of an older notebook with two graphic boards built-in
and a little switcher in front of the notebook to choose - before
startup - one of these boards.
Each of these boards need a separate xorg.conf file and two different
libs to work properly. Until now I used a tiny SysVinit script to
manage these dependencies, but after a update to Ubuntu 9.10 I have to
migrate this older SysVinit script into upstart.

First steps
At first I tried a upstart configuration like that:
====================================
start on starting gdm
script
	# ...
end script
====================================
because I thought that would be sufficient, but it did not work. I
always got an error message in my syslog like that:
"initgb main process (2733) terminated with status 1"
and the script did not changed anything as expected.

Further steps
I also tried "start on startup" but with the same result, then I tried
some further stuff but without success. I am also a little bit confused
about the event "graphics-device-added" which is noticed in the gdm.conf
file but I did not found any clue where this event is coming from.

Notice
The script I am using works very well if I am execute it as a normal
shell script as well as I invoke the script via upstart in a running
system ("initctl start initgb"), it just does not work on startup.
I attached my last upstart configuration file for further references.

I tried to figure it out on my own for several days but now I am at a
loss.
I appreciate every help or hint.

Best regards.
Wolfgang

-------------- next part --------------
# initgb - Initialize graphic board settings
#
# This is a special script for an old "Cebop HEL 700" notebook to initialize the
# graphic board.

description	"Initialize graphic board settings"

start on startup
#start on starting gdm

script
	# For which string should be searched in lspci.
	NV_PCI_SEARCH_STR="GeForce Go 6600"

	# The paths to all necessary files.
	FILE_XORG="/etc/X11/xorg.conf"
	FILE_IN_XORG="/etc/X11/xorg.conf.intel"
	FILE_NV_XORG="/etc/X11/xorg.conf.nvidia"

	FILE_LIBGL="/usr/lib/libGL.so.1"
	FILE_IN_LIBGL="/usr/lib/libGL.so.1.2"
	FILE_NV_LIBGL="/usr/lib/libGL.so.185.18.36"

	FILE_LIBGLX="/usr/lib/xorg/modules/extensions/libglx.so"
	FILE_IN_LIBGLX="/usr/lib/xorg/modules/extensions/libglx.so.1"
	FILE_NV_LIBGLX="/usr/lib/xorg/modules/extensions/libglx.so.185.18.36"

	# Remove a link and backup an existing file.
	# This function needs one argument.
	rmlink () {
		# We only proceed if we got one argument.
		if [ $# -eq 1 ]; then
			# Check if this file exists.
			if [ -e "$1" ]; then
				# If this file is a link just remove it, otherwise make a backup.
				if [ -L "$1" ]; then
					rm -f "$1"
				else
					mv -f "$1" "${1}.backup"
				fi
			fi
		fi
	}

	# Which board is set, nvboard will be one if the nvidia board is available,
	# otherwise zero.
	nvboard=$(lspci | grep -ci "$NV_PCI_SEARCH_STR")

	# Remove the existing xorg.conf, libGL.so and libglx.so links.
	rmlink $FILE_XORG
	rmlink $FILE_LIBGL
	rmlink $FILE_LIBGLX

	# Make new links for...
	if [ $nvboard -gt 0 ]; then
		# the nvidia board.
		ln -s "$FILE_NV_XORG" "$FILE_XORG"
		ln -s "$FILE_NV_LIBGL" "$FILE_LIBGL"
		ln -s "$FILE_NV_LIBGLX" "$FILE_LIBGLX"
	else
		# the intel board.
		ln -s "$FILE_IN_XORG" "$FILE_XORG"
		ln -s "$FILE_IN_LIBGL" "$FILE_LIBGL"
		ln -s "$FILE_IN_LIBGLX" "$FILE_LIBGLX"
	fi
end script