Public bug reported:
Binary package hint: gnome-control-center
This is a fresh install of Ubuntu Karmic 9.10. gnome-control-center is
at version 2.28.0-0ubuntu2
On a fresh install of Ubuntu on a system with an ATI card and dual-
monitors (no proprietary ATI drivers), I tried to turn off mirroring...
I performed these actions:
1. Selected System / Preferences / Display (which appears to execute
gnome-display-properties)
2. Unchecked the box for Mirror Displays
3. Dialog box appears asking if I wish to increase my virtual resolution to
support this mode, and I click yes.
4. The display properties window freezes. Process is still running but no
longer responding.
When running via the CLI, I see:
(gnome-display-properties:5172): Gtk-WARNING **: No object called:
Traceback (most recent call last):
File "/usr/share/screen-resolution-extra/policyui.py", line 184, in
on_button1_clicked
self.conf = get_xkit_service()
File "/usr/share/screen-resolution-extra/policyui.py", line 75, in
get_xkit_service
granted = policy_auth.obtain_authorization(POLICY_KIT_ACTION, widget)
File "/usr/lib/python2.6/dist-packages/ScreenResolution/policykit.py", line
65, in obtain_authorization
granted = self.auth_agent.ObtainAuthorization(action_id, xid, pid)
File "/usr/lib/python2.6/dist-packages/ScreenResolution/policykit.py", line
91, in __get_auth_agent
'org.freedesktop.PolicyKit.AuthenticationAgent', '/')
File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 244, in get_object
follow_name_owner_changes=follow_name_owner_changes)
File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 241, in __init__
self._named_service = conn.activate_name_owner(bus_name)
File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 183, in
activate_name_owner
self.start_service_by_name(bus_name)
File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 281, in
start_service_by_name
'su', (bus_name, flags)))
File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 620, in
call_blocking
message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The
name org.freedesktop.PolicyKit.AuthenticationAgent was not provided by any
.service files
Error in sys.excepthook:
Traceback (most recent call last):
File "/usr/lib/python2.6/dist-packages/apport_python_hook.py", line 100, in
apport_excepthook
os.O_WRONLY|os.O_CREAT|os.O_EXCL), 'w')
OSError: [Errno 13] Permission denied:
'/var/crash/_usr_share_screen-resolution-extra_policyui.py.1000.crash'
Original exception was:
Traceback (most recent call last):
File "/usr/share/screen-resolution-extra/policyui.py", line 184, in
on_button1_clicked
self.conf = get_xkit_service()
File "/usr/share/screen-resolution-extra/policyui.py", line 75, in
get_xkit_service
granted = policy_auth.obtain_authorization(POLICY_KIT_ACTION, widget)
File "/usr/lib/python2.6/dist-packages/ScreenResolution/policykit.py", line
65, in obtain_authorization
granted = self.auth_agent.ObtainAuthorization(action_id, xid, pid)
File "/usr/lib/python2.6/dist-packages/ScreenResolution/policykit.py", line
91, in __get_auth_agent
'org.freedesktop.PolicyKit.AuthenticationAgent', '/')
File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 244, in get_object
follow_name_owner_changes=follow_name_owner_changes)
File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 241, in __init__
self._named_service = conn.activate_name_owner(bus_name)
File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 183, in
activate_name_owner
self.start_service_by_name(bus_name)
File "/usr/lib/pymodules/python2.6/dbus/bus.py", line 281, in
start_service_by_name
'su', (bus_name, flags)))
File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 620, in
call_blocking
message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The
name org.freedesktop.PolicyKit.AuthenticationAgent was not provided by any
.service files
^CTraceback (most recent call last):
File "/usr/share/screen-resolution-extra/policyui.py", line 245, in <module>
gtk.main()
It appears that the display manager is attempting to increase my virtual
resolution, which requires authentication in order to write to those
files, but is failing to find the authentication libraries.
To fix this, I did:
sudo apt-get install policykit-gnome
and then followed the same steps above, but this time was prompted for
my password at step 4 and, upon successfully entering my password,
everything worked.
I would suggest that in dual-monitor situations (or maybe always?) the
policykit-gnome libraries are required?
ProblemType: Bug
Architecture: amd64
Date: Sat Oct 17 14:56:31 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/gnome-display-properties
LiveMediaBuild: Ubuntu 9.10 "Karmic Koala" - Beta amd64 (20090929.2)
NonfreeKernelModules: fglrx
Package: gnome-control-center 1:2.28.0-0ubuntu2
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-11.36-generic
SourcePackage: gnome-control-center
Uname: Linux 2.6.31-11-generic x86_64
** Affects: gnome-control-center (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug
--
Attempting to enable mirrored displays on a fresh Ubuntu install fails when not
root - missing dependency
https://bugs.launchpad.net/bugs/454261
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