Created attachment 7060 [details]
image of network monitor with no graph shown

Does it work in other Desktop Environments? Does it output errors when started from console?

Source RPM: (none) => net_monitor
Whiteboard: (none) => NEEDINFO

Is vnstat installed?  Is the vnstat service running?

(In reply to Samuel VERSCHELDE from comment #2)
> Does it work in other Desktop Environments?

affected desktops: xfce, lxde, mate, cinnamon,Kde plasma.

>Does it output errors when started from console?

response from terminal:
*****@localhost ~]$ net_monitor
/bin/net_monitor:4: PyGIWarning: Gdk was imported without specifying a version first. Use gi.require_version('Gdk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gdk
/bin/net_monitor:6: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk

(In reply to David Walser from comment #3)
> Is vnstat installed?

vnstat 1.14-1.mga6 is installed

> Is the vnstat service running?

please advise terminal query, thanks

This is a regression from the switch from python2 to python3 
Downgrading to python3 works fine

Draw signal is no more fired, which is very strange...

BTW I've noted some defects in the python3 switch that I'll push later.

CC: (none) => thierry.vignaud, yves.brungard_mageia
Hardware: i586 => All
Summary: network monitor does not display graph of traffic data => network monitor does not display graph of traffic data (python3 regression)
Source RPM: net_monitor => net_monitor-0

Created attachment 7065 [details]
fix shebang

Created attachment 7066 [details]
fix import warnings with latest gi

Created attachment 7067 [details]
fix "argument for 's' must be a bytes object"

Created attachment 7068 [details]
fix "ord() expected string of length 1, but int found"

Created attachment 7069 [details]
do not unset IP if we can't retrieve the MAC one

Created attachment 7070 [details]
fix "ord() expected string of length 1, but int found"

better fix (previous patch would display a bogus MAC address)

Attachment 7068 is obsolete: 0 => 1

LoadGUI.update does run queue_draw_aread() regularly but the handler for the "draw" signal is never called.
There's nothing obvious in diff between 0.20 & 0.21

All patches were applied.
With next patch, it's easy to see that python2 net_monitor/net_monitor does display graphes, whereas it doesn't with python3
This it's a fallout of python3 conversion (aka bug #16748)

Depends on: (none) => 16748

Created attachment 7073 [details]
use six for queue/Queue in order to ease python[23] run comparaisons

(NOT TO BE COMMIT)

With the gtk inspector, the only difference I saw is that there's no unmap signal handler with python3, which means the drawingarea is not realized IMHO

Though, on exit with python3, there's the following warnings:

TypeError: can't convert return value to desired type
net_monitor/net_monitor:884: Warning: g_value_get_boolean: assertion 'G_VALUE_HOLDS_BOOLEAN (value)' failed
  Gtk.main()
net_monitor/net_monitor:884: Warning: g_value_reset: assertion 'G_IS_VALUE (value)' failed
  Gtk.main()
net_monitor/net_monitor:884: Warning: g_value_unset: assertion 'G_IS_VALUE (value)' failed
  Gtk.main()

thanks for looking into this Thierry.

I found out what's the issue.
The real issue is within python3-cairo: __init__.py is wrongly in a src/ subdirectory...

Assignee: bugsquad => thierry.vignaud
Source RPM: net_monitor-0.21 => net_monitor-0.21, python3-cairo

Fixed in package

Status: NEW => RESOLVED
Resolution: (none) => FIXED

todays update  has fixed issue.

thanks again Thierry.