@Heiko: I just installed the Fedora 19 Alpha in VirtualBox, downloaded pyupdatesd and then modified its configuration section to change the "interval" from 900 seconds down to 10 (to get quicker feedback on whether the script is working or not). It worked for me. After about 10 seconds from running the script, the tray icon and message appeared, and clicking it brought me to the yumex GUI. This script waits /at least/ until the interval is first reached (i.e. 15 minutes after the script is run, in the default configuration), before it runs `yum check-update` to see if there are updates. When there are, `yum check-update` exits with status 100, and that's how the script knows when to show the icon and notification. If this isn't working, can you try debugging it? Around this part of the code, you can have it print the status and output of check-update: if int(time()) >= next_check: status, output = commands.getstatusoutput(c['check']) status = status >> 8 + print "status:", status + print "output:", output # Updates? if status == 100: Also the results of running, in bash: `yum check-update; echo $?` @Frank: Make sure you're running the script from within X11 (so that $DISPLAY is set). I see that error message if I attempt to run the script from text mode. ;) In my XFCE desktop, adding the script to my session startup list works for me. $ cat ~/.config/autostart/Update\ Daemon.desktop [Desktop Entry] Encoding=UTF-8 Version=0.9.4 Type=Application Name=Update Daemon Comment= Exec=/home/kirsle/bin/pyupdatesd OnlyShowIn=XFCE; StartupNotify=false Terminal=false Hidden=false -Noah On 05/26/2013 05:00 AM, xfce-request(a)lists.fedoraproject.org wrote: