4

NOTE: This question is not relevant to the dbus problem I am experiencing as described below.

I tried to run qpaeq after installing. It asks for dbus. Other posts say to install python-dbus. It doesn't help. There is also no dbus-python, which is what qpaeq is asking for. What to do? Transcript follows:

$ sudo apt-get install pulseaudio-equalizer
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  python3-dbus.mainloop.pyqt5
The following NEW packages will be installed:
  pulseaudio-equalizer python3-dbus.mainloop.pyqt5
0 upgraded, 2 newly installed, 0 to remove and 19 not upgraded.
Need to get 50.7 kB of archives.
After this operation, 281 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 python3-dbus.mainloop.pyqt5 amd64 5.14.1+dfsg-3build1 [16.8 kB]
Get:2 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 pulseaudio-equalizer amd64 1:13.99.1-1ubuntu3.7 [34.0 kB]
Fetched 50.7 kB in 0s (281 kB/s)               
Selecting previously unselected package python3-dbus.mainloop.pyqt5.
(Reading database ... 475713 files and directories currently installed.)
Preparing to unpack .../python3-dbus.mainloop.pyqt5_5.14.1+dfsg-3build1_amd64.deb ...
Unpacking python3-dbus.mainloop.pyqt5 (5.14.1+dfsg-3build1) ...
Selecting previously unselected package pulseaudio-equalizer.
Preparing to unpack .../pulseaudio-equalizer_1%3a13.99.1-1ubuntu3.7_amd64.deb ...
Unpacking pulseaudio-equalizer (1:13.99.1-1ubuntu3.7) ...
Setting up python3-dbus.mainloop.pyqt5 (5.14.1+dfsg-3build1) ...
Setting up pulseaudio-equalizer (1:13.99.1-1ubuntu3.7) ...

$ qpaeq
There was an error importing needed libraries
Make sure you have qt5 and dbus-python installed
The error that occurred was:
    No module named 'dbus'


$ sudo apt-get install python-dbus
Reading package lists... Done
Building dependency tree

Reading state information... Done
python-dbus is already the newest version (1.2.16-1build1).
0 upgraded, 0 newly installed, 0 to remove and 19 not upgraded.


$ qpaeq
There was an error importing needed libraries
Make sure you have qt5 and dbus-python installed
The error that occurred was:
    No module named 'dbus'


$ sudo apt-get install dbus-python
Reading package lists... Done
Building dependency tree

Reading state information... Done
E: Unable to locate package dbus-python
Lars Ericson
  • 285

2 Answers2

5

If you get this error, you likely need a couple of modules, as noted in a comment above. If you want the changes to be permanent, you'll need to load the modules from /etc/pulse/default.pa. Add the following lines to the bottom of the file:

load-module module-equalizer-sink
load-module module-dbus-protocol

You can trigger the changes to take effect immediately with pulseaudio -k.

David Shepard
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0

I ran into the same problem.

For me it was caused by locally installed version of pyqt5 which probably wasn't up to date (or missing something from the system packager provided one).

You can check this by doing this:

$ python
Python 3.9.2 (default, Feb 20 2021, 18:40:11)
[GCC 10.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import dbus.mainloop; print(dbus.mainloop)
<module 'dbus.mainloop' from '[PATH]'>

If the value of [PATH] points somewhere into your home directory (eg. starts at /home/...) then you have pyqt5 installed locally and it might be good idea to remove it and leave there only the package manager installed one.

Remove it with (without using sudo) by issuing pip uninstall pyqt5 (it will ask and show you where from you are removing the package, the [PATH] should match that).

Wereii
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