If you have both kdm and gdm installed, you have upstart configurations
for both of them:
/etc/init/gdm.conf:
(..)
script
[ ! -f /etc/X11/default-display-manager -o "$(cat
/etc/X11/default-display-manager 2>/dev/null)" = "/usr/sbin/gdm" ]
(..)
/etc/init/kdm.conf:
(..)
script
[ ! -f /etc/X11/default-display-manager -o "$(cat
/etc/X11/default-display-manager 2>/dev/null)" = "/usr/bin/kdm" ]
(..)
Since that fatal xserver-xorg update, we also have
/etc/init/failsafe-x.conf:
(..)
start on stopped gdm EXIT_STATUS=[!0]
stop on runlevel [06]
task
exec /etc/gdm/failsafeXServer
If kdm is the active display manager, /etc/X11/default-display-manager contains
"/usr/bin/kdm", so upstart will try to start both gdm and kdm, but gdm will
fail because of the check quoted above. This will emit a stopped gdm event with
EXIT_STATUS != 0, which will start /etc/gdm/failsafeXServer. Now both kdm and
failsafeXServer are started and we have a problem.
One solution is to add the following line at the start of
/etc/gdm/failsafeXServer:
[ ! -f /etc/X11/default-display-manager -o "$(cat /etc/X11/default-
display-manager 2>/dev/null)" = "/usr/sbin/gdm" ] || exit 0
This will terminate failsafeXServer if the default display manager is
not gdm.
As a patch for the system configuration:
--------------------------------------------------
--- /etc/gdm/failsafeXServer.orig 2009-12-06 12:42:47.000000000 +0100
+++ /etc/gdm/failsafeXServer 2009-12-06 12:44:09.000000000 +0100
@@ -24,6 +24,8 @@
# not, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA 02111-1307 USA
+[ ! -f /etc/X11/default-display-manager -o "$(cat
/etc/X11/default-display-manager 2>/dev/null)" = "/usr/sbin/gdm" ] || exit 0
+
xorg_conf_failsafe=${BPX_XORG_CONF_FAILSAFE:-"/etc/X11/xorg.conf.failsafe"}
xorg_conf=${BPX_XORG_CONF:-"/etc/X11/xorg.conf"}
run_dexconf=${BPX_RUN_DEXCONF:-"yes"}
-------------------------------------------------
and as a patch for the xserver-xorg package:
-------------------------------------------------
diff -ru xorg-ubuntu-git.orig/debian/local/Failsafe/failsafeXServer
xorg-ubuntu-git/debian/local/Failsafe/failsafeXServer
--- xorg-ubuntu-git.orig/debian/local/Failsafe/failsafeXServer 2009-11-09
08:58:44.000000000 +0100
+++ xorg-ubuntu-git/debian/local/Failsafe/failsafeXServer 2009-12-06
13:21:02.000000000 +0100
@@ -24,6 +24,8 @@
# not, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA 02111-1307 USA
+[ ! -f /etc/X11/default-display-manager -o "$(cat
/etc/X11/default-display-manager 2>/dev/null)" = "/usr/sbin/gdm" ] || exit 0
+
xorg_conf_failsafe=${BPX_XORG_CONF_FAILSAFE:-"/etc/X11/xorg.conf.failsafe"}
xorg_conf=${BPX_XORG_CONF:-"/etc/X11/xorg.conf"}
run_dexconf=${BPX_RUN_DEXCONF:-"yes"}
-------------------------------------------------
** Attachment added: "Do not start failsafeXServer if not using gdm"
http://launchpadlibrarian.net/36497362/failsafe.patch
--
after recent update which included xorg, xserver etc causes low-graphics mode
error at start
https://bugs.launchpad.net/bugs/491483
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