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Questions tagged [dbus]

D-BUS is a messaging system used by applications to talk to each other.

Questions concerning D-BUS programming and/or errors caused by the dBus system it's messages and queries.

371 questions
82
votes
2 answers

How do I write a Unity system indicator in Python?

Background: This is NOT for application-indicators but system-indicators. Picture from: https://wiki.ubuntu.com/DesktopExperienceTeam/ApplicationIndicators The objective is to show indicator-sysmonitor in Greeter/Lock/Ubiquity screens. There is a…
user.dz
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52
votes
6 answers

Tool for viewing available DBUS messages I can send to an application

Is there a graphical tool or maybe a command-line one that lists all the messages and parameters/arguments that I can send to a DBUS-enabled program?? I really want to try scripting some DBUS things but I can hardly find any documentation for the…
user5245
44
votes
2 answers

.dbus folder in home folder belongs root

I have a folder ~/.dbus in my homefolder that is only read and writeable by root: drwx------ 3 root root 4096 Feb 17 17:30 . drwx------ 2 root root 4096 Feb 17 17:30 session-bus Is this the correct setting? Or if not, how could that happen?
rubo77
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43
votes
11 answers

"No object for D-Bus interface" when mounting with Nautilus

I have an internal HDD that gives this error when I try to mount either of its two partitions in Nautilus, while my main HDD works fine. When I use Disks to mount it works but unmounting in Nautilus gives the same error. mount works too. dmesg and…
duo8
  • 431
41
votes
8 answers

"JACK server could not be started" when using Qjackctl

I have a problem when I try to connect my guitar to my computer, via line input. Audacity works well, and I can record what I play on my guitar (selecting from Preferences from where to record to default:line0). But the problem is in Qjackctl : at…
hingev
  • 6,684
30
votes
7 answers

GDBus.Error when trying to enable second screen

I connected an external screen to my laptop, but my desktop didn't automagically extend to it, as it used to do about a year ago (older version of Ubuntu). I went to the display settings. The screen was listed there (correct resolution, brand name,…
user77500
28
votes
2 answers

Suspend command in Ubuntu 16.04

In Ubuntu 14.04 I used to use the following command to suspend the computer as a user without root privileges: dbus-send --system --print-reply --dest="org.freedesktop.UPower" \ /org/freedesktop/UPower org.freedesktop.UPower.Suspend Unfortunately…
tmt
  • 1,019
28
votes
8 answers

GConf Error: No D-BUS daemon running?! How to reinstall or fix?

After installing Konquerer and restarting my laptop i got the following error while trying to open, edit or access files as root from within Terminal (which is existencial for me). root@linuxBox:/home/v2r# gnome-open /home/ (gnome-open:2686):…
v2r
  • 9,707
25
votes
2 answers

How to read dbus-monitor output?

I'm playing around with dbus-monitor to try and understand how dbus is working in Ubuntu environment. I have several questions in this regard: Could you please let me know how to read the following properly? I understand the big idea, but not the…
neydroydrec
  • 4,780
23
votes
2 answers

Couldn't connect to accessibility bus

When using ssh with X11 forwarding, I am getting various errors and warnings when running gui applications. As an example, any time I am running gitg, I get the following warning: ** (gitg:15904): WARNING **: Couldn't connect to accessibility bus:…
Bach
  • 751
22
votes
2 answers

CRITICAL: Unable to create a DBus proxy for GnomeScreensaver

I received this critical error in my logs, but I haven't had any problems so far. If anyone knows why I get this error and what it means, I'd really appreciate an answer from you. CRITICAL: Unable to create a DBus proxy for GnomeScreensaver:…
Harry Curtis
  • 461
19
votes
1 answer

What actions does Ubuntu trigger when battery is low?

When the battery is low, the screen gets dimmed after a few seconds already. This appears to be some special power-saving mode, and might be related to the time in org.gnome.settings-daemon.plugins.power.time-low (1200 seconds (20 minutes) the…
blueyed
  • 9,125
19
votes
3 answers

What does udisks-daemon do and do I need it?

I was looking into htop and the only process having > 0.0% CPU (apart from htop itself) was /usr/lib/udisks/udisks-daemon. So the questions are: What is this service? Do I need it? (Or when do I need it?) Why is it accessing the drives?
leemes
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18
votes
1 answer

D-Bus : Where to get started?

Many every day actions in Ubuntu can be done easily from terminal using dbus. The main advantage is it can be done exactly the GUI does, using a one liner, such as change brightness, copy file, etc. For example, to decrease brightness standard…
totti
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16
votes
2 answers

How do I run a script on a dbus signal?

Is it possible to run a script on an arbitrary dbus signal? Something like Upstart that runs as an unprivileged user and doesn't require root perms to modify? I ask because I've already written a silly script that waits for bluetooth events to start…
Erigami
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