/media/bill/PROJECTS/System_maintenance/Linux/DISPLAY variable - to run GUI from command line.txt
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29Jan2018  Epiphany browser error messsages

I gave up chasing this for now as I have to do ISNN2018 conference peer reviews...

(epiphany-browser:1119): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
** Message: console message:  @0: Unrecognized Content-Security-Policy directive 'frame-ancestors'.

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https://archlinuxarm.org/forum/viewtopic.php?f=31&t=8414
Re: Epiphany web browser crashing on start
Postby sdjf » Wed Feb 11, 2015 8:38 am
To start any GUI application from the command line, you need to set the DISPLAY variable. That is not likely to be the cause of the error message, but is essential to set.
What does the following give you?
echo $DISPLAY
when you started Epiphany in Raspbian, was it also from command line or from the GUI?
If you are running Openbox as a standalone window manager, if you have not considered doing so, you may want to install lxpanel, which has a nice popup menu for starting GUI apps.
sdjf
Posts: 178
Joined: Wed May 08, 2013 1:55 pm

>> RaspPi (logged in from terminal pre-startx) shows :
$ echo "$DISPLAY"
:0.0


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search "Linux and $DISPLAY environmental variable"

https://askubuntu.com/questions/432255/what-is-the-display-environment-variable
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Example of values
localhost:4
google.com:0
:0.0
hostname:D.S means screen S on display D of host hostname; the X server for this display is listening at TCP port 6000+D.
host/unix:D.S means screen S on display D of host host; the X server for this display is listening at UNIX domain socket /tmp/.X11-unix/XD (so it's only reachable from host).
:D.S is equivalent to host/unix:D.S, where host is the local hostname.
:0.0 means that we are talking about the first screen attached to your first display in your local host
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edited Mar 20 '17 at 10:18, Community
answered Mar 10 '14 at 13:52, Maythux












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