Facing Issues with GNU Radio on O-RAN Profile

[Abhimanyu Sethia]

Hi

I am trying to run a GNU Radio Companion Flowgraph. I instantiated a POWDER O-RAN Profile with these parameters. Then, I successfully installed gnu-radio using `sudo apt-get install gnuradio` (version installed- 3.10.5.1). After this, when I try to launch GNU Radio Companion using command `gnuradio-companion`, it throws the following error:

  

While trying to display an error message, another error occurred Namespace Gtk not available The original error message follows. ValueError Failed to initialize GTK. If you are running over ssh, did you enable X forwarding and start ssh with -X? (Namespace Gtk not available)
Additional Information that might be useful

• I have tried the same steps on local terminal (ssh-ed using -X flag and with Xming app installed on Windows) as well as on the VNC window. Both give the same error message. 
• I tried to implement the solution suggested here and ran sudo apt-get install libgtk-3-dev and sudo apt install python3-gi gobject-introspection gir1.2-gtk-3.0 . After installing the apps, gnuradio-companion still did not work but the error message changed to this- https://pastebin.com/5e9qQzsp.

Any help on how do I run gnuradio-companion would be appreciated. 

[David M. Johnson]

On 6/29/23 18:28, Abhimanyu Sethia wrote:
> Hi
>
> I am trying to run a GNU Radio Companion Flowgraph. I instantiated a
> POWDER O-RAN Profile

> <https://www.powderwireless.net/show-profile.php?project=PowderProfiles&profile=O-RAN> with these <https://www.powderwireless.net/p/PowderProfiles/O-RAN&rerun_paramset=8b225f4d-16af-11ee-9f39-e4434b2381fc>parameters. Then, I successfully installed gnu-radio using `sudo apt-get install gnuradio` (version installed- 3.10.5.1). After this, when I try to launch GNU Radio Companion using command `gnuradio-companion`, it throws the following error:

> While trying to display an error message, another error occurred
> Namespace Gtk not available The original error message follows.
> ValueError Failed to initialize GTK. If you are running over ssh, did
> you enable X forwarding and start ssh with -X? (Namespace Gtk not
> available)

> *Additional Information that might be useful*
>
> * I have tried the same steps on local terminal (ssh-ed using -X flag

> and with Xming app installed on Windows) as well as on the VNC
> window. Both give the same error message.

> * I tried to implement the solution suggested here
> <https://stackoverflow.com/questions/56823857/valueerror-namespace-gtk-not-available> and ran /sudo apt-get install libgtk-3-dev /and /sudo apt install python3-gi gobject-introspection gir1.2-gtk-3.0 . /After installing the apps, /gnuradio-companion/ still did not work but the error message changed to this- https://pastebin.com/5e9qQzsp <https://pastebin.com/5e9qQzsp>.

>
> Any help on how do I run gnuradio-companion would be appreciated.

Hi Abhimanyu. I'm not sure why gnuradio-companion doesn't pull in these
deps (gobject-introspection python3-gi gir1.2-gtk-3.0) by default on
Ubuntu 22, but that is indeed the first step. As for the second issue,
that is an X forwarding thing. If you try running `xterm` or similar,
you will get a more meaningful error (likely that DISPLAY is not set).
Some Linux distros do not build xorg-server with XC-SECURITY, so when
ssh runs its xauth generate command, that fails; so those users might
need to use both `ssh -X -Y` (man ssh) to forward. I wonder if that is
the case for you, or maybe some other problem when ssh runs xauth (e.g.,
a bug where xauth is not in the expected place). You can check by
adding `-vv` to your ssh command and look for errors running xauth. Try
running the xauth command manually yourself with a different path (ssh
uses a tmpdir that won't exist if you just copy what it ran from the
log), and see if there is an error.

David