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I have accidentally clicked on "hide this notification" / "Do not show this message again" button in OSD notification system in Lubuntu 12.10, namely xfce4-notifyd. The information was about wireless network being connected (I still have notification of being disconnected from WiFi) from network applet.
I can configure style of notification with xfce4-notifyd-config, how to configure which notifications are shown and which are not?
As I disable the vpn notification, I found the solution prompted by this thread. Open gconf-editor, expand apps, expand nm-applet, you will see the entry of 'disable-vpn-notifications'. Modify the value to undo it.
I also have Xubuntu, and made the same mistake: clicked the "Do not show this message again" button when the (wired) nework connection notification was shown. I restored it like this:
# sudo apt-get install dconf-editor dconf-cli
# dconf-editor
Warning: this answer is speculative because I haven't hidden any notifications myself!
Run find ~/ -mmin -10 -type f replacing -10 with a more appropriate time to specify how far back find should go (from the current time).
Depending on how active you've been, you'll get a list of files modified in the period you specified.
To find which file is modified by changing settings in xfce4-notifyd-config, I made a simple change, moving the location of the notification from bottom left to bottom right.
I then ran the find command given above. This let me identify ~/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-notifyd.xml as the file in which at least some settings of xfce4-notifyd-config are stored.
I hope you can find information in that file that may let you undo the "hidden" setting. To comment out stuff in .xml files use <!-- to denote the start of a comment and --> for the end. In other words, first back up xfce4-notifyd.xml and then edit the original to comment out any line (or content) that seems to be responsible for the "hidden" setting.
As I cautioned at the beginning, this is just a suggestion and not a proven means of reversing the "hidden" setting!
For the record, here's what my xfce4-notifyd.xml file looks like:
<?xml version="1.0" encoding="UTF-8"?>
<channel name="xfce4-notifyd" version="1.0">
<property name="notify-location" type="uint" value="3"/>
<property name="initial-opacity" type="double" value="0.580000"/>
<property name="expire-timeout" type="int" value="5"/>
</channel>
xfce4-notifyd notification).
– Jakub Narębski
Mar 25 '13 at 15:32
gnome-power-manager, but the solution doesn't work for my issue: ubuntuforums.org/showthread.php?t=1050875 – Jakub Narębski Mar 26 '13 at 8:25