Xnest just shows a black screen and message about AccessDenied

[Martin Pool]

When I try to start Xnest or gdmXnest in Jaunty, I get a window that's just black, and these messages in my terminal:

mbp@grace% Xnest :20
[dix] Could not init font path element /usr/share/fonts/X11/cyrillic, removing from list!
[config/dbus] couldn't take over org.x.config: org.freedesktop.DBus.Error.AccessDenied (Connection ":1.730" is not allowed to own the service "org.x.config.display20" due to security policies in the configuration file)
[ 0.275479] (EE) config/hal: NewInputDeviceRequest failed (2)
[ 0.278440] (EE) config/hal: NewInputDeviceRequest failed (2)
[ 0.279813] (EE) config/hal: NewInputDeviceRequest failed (2)
[ 0.281186] (EE) config/hal: NewInputDeviceRequest failed (2)
^C

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
NonfreeKernelModules: nvidia
Package: xnest 2:1.5.99.902-0ubuntu7
ProcEnviron:
 PATH=(custom, user)
 LANG=en_AU.UTF-8
 SHELL=/bin/zsh
SourcePackage: xorg-server
Uname: Linux 2.6.28-8-generic x86_64

[Martin Pool (mbp)]

Here's the log of the host/real X server:

[Rob Frohne (frohro)]

This also happens when you try to run sugar-emulator.

Rob

[Alex Marginean (axel014)]

It doesn't look like a d-bus error to me. I have the same issue on karmik:

If i do
startx -- /usr/bin/Xnest -geometry 800x640 :2 &

all I get is a black Xnest window and a few messages like this one:
(EE) config/hal: NewInputDeviceRequest failed (2)

looking at ps f:
 2145 pts/0 S 0:00 \_ /bin/bash /usr/bin/startx -- /usr/bin/Xnest -geometry 800x640 :2
 2163 pts/0 S 0:00 | \_ xinit /etc/X11/xinit/xinitrc -- /usr/bin/Xnest -geometry 800x640 :2 -auth /tmp/serverauth.Ye3BMqKlp2
 2164 pts/0 S 0:00 | \_ /usr/bin/Xnest :0 -geometry 800x640 :2 -auth /tmp/serverauth.Ye3BMqKlp2

the /usr/bin/Xnest :0 -geometry 800x640 :2 line looks a bit weird, :0 should not be there, altough this doesn't appear to be the cause of the issue.

Running:
Xnest -geometry 800x640 :2 &
export DISPLAY=:2
x-session-manager &

seems to work and spawns an usable X session with window manager and all.

Alex