The MPRIS process error message is not very descriptive

Issue

When I use PuTTY (on Windows) to connect to an Ubuntu 18.04 desktop machine (without X11 forwarding) mpsyt shows following error message:

old error message

mpris interface couldn't be initialized. Is dbus properly configured?

I don't know how to fix it until I modified the mpris.main() function to let it print DBusException.get_dbus_message() return value, and it saves me a lot of time to seek a solution.

new error message

Unable to autolaunch a dbus-daemon without a $DISPLAY for X11

By setting the $DISPLAY environment variable to :0, I can now playing audio without any problems. And the play progress bar display normally too.

$ DISPLAY=:0 mpsyt playurl ioNng23DkIM

Suggestion

Show the exact reason when MPRIS process exited abnormally.

possible modification in mpris.py

def main(connection):
    """
        runs mpris interface and listens for changes
        connection - pipe to communicate with this module
    """

    mprisctl = Mpris2Controller()
    try:
        mprisctl.acquire()
-    except dbus.exceptions.DBusException:
+    except dbus.exceptions.DBusException as e:
-        print('mpris interface couldn\'t be initialized. Is dbus properly configured?')
+        print('mpris interface couldn\'t be initialized. reason: {}'.format(e.get_dbus_message()))
        return
    mprisctl.run(connection)
    mprisctl.release()

Your Environment

OS version: Ubuntu 18.04 music player: (default)

mpsyt version      : 0.2.7.1
   notes           : released 6 July 2016
pafy version       : 0.5.2 (youtube-dl backend)
youtube-dl version : 2020.06.16.1
Python version     : 3.6.9 (default, Apr 18 2020, 01:56:04)
[GCC 8.4.0]
Processor          : x86_64
Machine type       : x86_64
Architecture       : 64bit, ELF
Platform           : Linux-4.15.0-109-generic-x86_64-with-Ubuntu-18.04-bionic
sys.stdout.enc     : UTF-8
default enc        : utf-8
Config dir         : /home/poyenc/.config/mps-youtube
env:TERM           : screen-256color
env:SHELL          : /bin/bash
env:LANG           : en_US.UTF-8

mps-youtube / yewtube