[X2Go-User] Unable to start firefox docker inside x2go

[Bas van den Heuvel]

I've tried all variations of $DISPLAY.

Also tried to use xhost+ etc. etc.

and my firefox docker contains the X unix socket.

It works on my laptop without additional work (same docker version)

It works on the x2go machine (connected through VNC/Spice) when I issue 
xhost + first

It simply doesn't work when I use the x2go display

Any ideas ?

It worked before, just don't know what did change


On 14-04-18 01:43, Mihai Moldovan wrote:
> * On 04/13/2018 01:54 PM, Bas van den Heuvel wrote:
>> In the past, I edited /usr/bin/x2gostartagent and removed the "-nolisten
>> tcp" part, and edited /etc/x2go/x2goagent.options to remove "-nolisten tcp"
>>
>> It's not working, even a simple xeyes docker fails to open display:
>>
>> vdheuvel at arthur:/data/home/vdheuvel$ docker run   --rm -it
>> --net=host   -e DISPLAY  -v $HOME/.Xauthority:/root/.Xauthority
>> fr3nd/xeyes
>> No protocol specified
>> Error: Can't open display: :50.0
> Makes sense, since it sounds like the UNIX socket is not passed through to the
> container.
>
> I'm not sure why your TCP workaround worked in the past, though. The DISPLAY
> syntax should be local-socket-specific (either UNIX socket or abstract UNIX
> socket), without a fallback to TCP.
>
> To use TCP connections, you'd have to specify DISPLAY=localhost:50.
>
>
> The more curious thing here is that normally Xlib tries to connect via an
> abstract UNIX socket, which theoretically should be also available in a
> container - unless docker prohibits that, which would be plausible for security
> reasons.
>
>
>
> Mihai
>