Comment 2 for bug 441628

Are more people experiencing this bug?

Notify.py is implemented for the GTK (GNOME version) of backintime indeed,
however I guess the KDE version fails to detect if the xserver is running or
not and whether there is a display, (KDE does not use GTK). What might be
the solution is to implement the notify solutions also in the KDE version,
however I am not an expert on KDE and have not really a clue how to do
that...

Cheers,
Bart

2009/10/6 cliff6056 <email address hidden>

> Now, I have no idea if the following applies, but the explanation seems
> to fit: that when the display is active, backintime-kde works fine,
> however, when the display is not, it fails with no backup, and the
> systray icon remains frozen in place. Also, when the systray icon is
> frozen, a mouseover message as follows: "Compare with snapshot
> 2009-10-05 19:00 :01 (rsync:>F++++++++++++++++++
> etx/X11/Xwrapper.config)".
>
> My skill level is such that I have no idea if the above or below
> information is useful in detecting the Segmentation Fault problem
> originally posted or if it is related, however, hope it of assistance if
> anyone else has this problem. Should also point out that if I install
> backintime-gnome on the kde system, no systray icon ever appears, and
> subsequently, backintime does not experience any issues, and is the
> solution I use at this time.
>
> The following is quoted from the le-web.org site: http://www.le-
> web.org/2008/11/06/pygtk-how-to-display-a-systray-icon-from-a-cronjob/.
>
>
> PyGTK: How to display a systray icon from a cronjob
>
> It is nice to give some user feedback when someting happen in a
> background application. For example when a cronjob is running it would
> be nice to show a systray icon.
>
>
> When the cron-job runs the DISPLAY environment variable is not defined so
> your gtk application can’t access to xserver. So before importing pygtk you
> should check if DISPLAY is defined. If not just define it to default value
> “:0.0″.
>
> import os
>
> #if DISPLAY is not set, then set it to default ':0.0'
> if len( os.getenv( 'DISPLAY', '' ) ) == 0:
> os.putenv( 'DISPLAY', ':0.0' )
>
> import pygtk
> pygtk.require("2.0")
>
> But what happens if your gtk application really can’t connect to the
> xserver (xserver is not runnig, you are not logged in …). In this case
> your application should not try to use xserver related functions. For
> example when I try to use gtk.StatusIcon the application ends with a
> segmentation fault.
>
> To check if your application can access to xserver just get the default
> display. If it is None then you can’t access it.
>
> display = gtk.gdk.display_get_default()
> if not display is None:
> ...
>
>
> Now, putting all together I made this simple application: notify.py.
>
> import os
>
> #if DISPLAY is not set, then set it to default ':0.0'
> if len( os.getenv( 'DISPLAY', '' ) ) == 0:
> os.putenv( 'DISPLAY', ':0.0' )
>
> import pygtk
> pygtk.require("2.0")
> import gtk
> import threading
> import time
>
> #GTK main loop thread
> class GTKMainThread(threading.Thread):
> def run(self):
> gtk.main()
>
> #get default display. None means it can't connect to xserver
> display = gtk.gdk.display_get_default()
> statusIcon = None
>
> #if the display is not None show status icon
> if not display is None:
> #start a gtk loop in another thread
> gtk.gdk.threads_init()
> GTKMainThread().start()
>
> try:
> statusIcon = gtk.StatusIcon()
> statusIcon.set_from_stock( gtk.STOCK_INFO )
> statusIcon.set_visible( True )
> statusIcon.set_tooltip(_("Back In Time: take snapshot ..."))
> except:
> pass
>
> #do something here
> print "Begin"
> time.sleep( 5 ) #wait 5 seconds
> print "End"
>
> #hide status icon
> if not statusIcon is None:
> statusIcon.set_visible( False )
>
> #quit GTK main look
> if not display is None:
> gtk.main_quit()
>
>
> Try it:
>
> python notify.py
>
> Now to try it from cron, you can add it in you crontab to be called
> every 10 minutes (use full path to notify.py):
>
> ( crontab -l; echo "0 * * * * python /FULLPATH/notify.py" ) | crontab -
> ( crontab -l; echo "10 * * * * python /FULLPATH/notify.py" ) | crontab -
> ( crontab -l; echo "20 * * * * python /FULLPATH/notify.py" ) | crontab -
> ( crontab -l; echo "30 * * * * python /FULLPATH/notify.py" ) | crontab -
> ( crontab -l; echo "40 * * * * python /FULLPATH/notify.py" ) | crontab -
> ( crontab -l; echo "50 * * * * python /FULLPATH/notify.py" ) | crontab -
>
> Check your crontab:
>
> crontab -l
>
> you should see the lines with “python /FULLPATH/notify.py”.
>
> To remove it from your crontab just call:
>
> crontab -l | grep -v notify.py | crontab -
>
> Tags: cron, Linux, pygtk, python, systray
>
> This entry was posted on Thursday, November 6th, 2008 at 1:51 pm and is
> filed under Linux, Python/PyGTK, Tips, Tricks & Scripts. You can follow
> any responses to this entry through the RSS 2.0 feed. You can leave a
> response, or trackback from your own site.
>
> --
> BAckintime crash when screen locked
> https://bugs.launchpad.net/bugs/441628
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> Time Team, which is the registrant for Back In Time.
>