How to fix error Xlib.error.DisplayConnectionError: Can't connect to display ":0": b'No protocol specified\n'

python xlib
BPS picture BPS · Aug 9, 2015 · Viewed 10.4k times · Source

I'm making some program with python3 and XLib.

On my PC with Ubuntu 14.04 everything works fine but when I try to run my app in my notebook with manualy installed Xorg I get exception:

Xlib.error.DisplayConnectionError: Can't connect to display ":0": b'No protocol specified\n'

on line:

self.__display = Xlib.display.Display()

What's going on here? How to fix this that it could work on every Linux?

Edit:

This does not look like duplicate of X11: run a gnome app as another user. On my both computers I have same users and groups, so this problem is probably not connected with lack of permissions to run my program.

It must be something else something with bad configuration of X.

Answer

brianlen picture brianlen · Mar 17, 2016

Temporary workaround is

$ xhost +

http://ubuntuforums.org/showthread.php?t=2290602

Related questions

How do you install Python Xlib with pip?

"Python Xlib" ( http://pypi.python.org/pypi/Python%20Xlib ) is a low level python library for working with xlib. I have installed it on my Ubuntu Linux machine via apt, i.e. sudo aptitude install python-xlib. However is it possible …

Read More
Get display count and resolution for each display in Python without xrandr

I'm running Ubuntu and I want to get the number of attached displays, their current resolution and, if possible, their position in relation to each other. Because I don't like parsing Console output of xrandr - at least not if …

Read More
How do I list all files of a directory?

How can I list all files of a directory in Python and add them to a list?

Read More