I followed this tutorial to set the brightness indicator on Unity. But when I run the
sudo /opt/indicator-brightness/indicator-brightness.py
command from a terminal, I get
(indicator-brightness.py:1734): Gtk-WARNING **: Impossible to find the theme engine in module_path : « pixmap »
Traceback (most recent call last):
File "/opt/indicator-brightness/indicator-brightness.py", line 78, in <module>
create_menu(ind)
File "/opt/indicator-brightness/indicator-brightness.py", line 46, in create_menu
curr_brightness = get_curr_brightness()
File "/opt/indicator-brightness/indicator-brightness.py", line 33, in get_curr_brightness
curr_brightness = int(p.communicate()[0])
ValueError: invalid literal for int() with base 10: 'No backlights were found on your system\n'
.
Any suggestion is most welcome.