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ethanabrooks

Member

Registered: 2017-06-16

Posts: 9

[SOLVED] kb-light.py throws org.freedesktop.DBus.Error.ServiceUnknown

I am trying to backlight my keyboard and so I added the script kb-light.py to /usr/local/bin as recommended by this post .

However, I am getting the following error:

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/dbus/bus.py", line 175, in activate_name_owner
    return self.get_name_owner(bus_name)
  File "/usr/lib/python3.6/site-packages/dbus/bus.py", line 361, in get_name_owner
    's', (bus_name,), **keywords)
  File "/usr/lib/python3.6/site-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name 'org.freedesktop.UPower': no such name

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/kb-light.py", line 28, in <module>
    print(kb_light_set(1))
  File "/usr/local/bin/kb-light.py", line 10, in kb_light_set
    kbd_backlight_proxy = bus.get_object('org.freedesktop.UPower', '/org/freedesktop/UPower/KbdBacklight')
  File "/usr/lib/python3.6/site-packages/dbus/bus.py", line 241, in get_object
    follow_name_owner_changes=follow_name_owner_changes)
  File "/usr/lib/python3.6/site-packages/dbus/proxies.py", line 248, in __init__
    self._named_service = conn.activate_name_owner(bus_name)
  File "/usr/lib/python3.6/site-packages/dbus/bus.py", line 180, in activate_name_owner
    self.start_service_by_name(bus_name)
  File "/usr/lib/python3.6/site-packages/dbus/bus.py", line 278, in start_service_by_name
    'su', (bus_name, flags)))
  File "/usr/lib/python3.6/site-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files

The offending line is:

kbd_backlight_proxy = bus.get_object('org.freedesktop.UPower', '/org/freedesktop/UPower/KbdBacklight')

I haven't found much relating to this on Google so I thank you for your help.

Last edited by ethanabrooks (2017-09-29 12:07:45)

loqs

Member

Registered: 2014-03-06

Posts: 17,331

Re: [SOLVED] kb-light.py throws org.freedesktop.DBus.Error.ServiceUnknown

Have you verified upower is installed?

ethanabrooks

Member

Registered: 2017-06-16

Posts: 9

Re: [SOLVED] kb-light.py throws org.freedesktop.DBus.Error.ServiceUnknown

Sorry for the delayed response. My email notifications were not properly setup so I didn't realize that I had received a response. Installing the upower package solved the problem. Thank you.