A complete new install of lubuntu 11.10 [...17.10] has synaptic 0.75.2ubuntu7 [...0.84.2]. Previously when using synaptic on another system there was a search box in the tool bar where a search string could be entered which would reduce the displayed packages as the string was being entered. The box is not being displayed nor do I find any setting to enable/disable it.

  • this is still a bug in 12.10 Lubuntu however solved with the answer provided – Ringtail Nov 29 '12 at 3:47
  • experienced in lubuntu 15.10, fixed with provided answer – Al F Feb 25 '16 at 15:50
up vote 50 down vote accepted
sudo apt-get install apt-xapian-index
sudo update-apt-xapian-index -vf

From: http://ubuntuforums.org/showthread.php?t=1178974

  • Unfortunately this solution does not work for me (ubuntu x64 12.10 fresh install) – JoZ3 Apr 10 '13 at 17:12
  • 5
    works for ubuntu 16.04 – aryndin Apr 8 '16 at 6:15
  • 2
    Needed this in Ubuntu GNOME 16.04 as well. – zeitue Apr 23 '16 at 1:14
  • What are these commands doing? What are we installing? Just giving the link is dangerous, as it might die. Would be nice to have an explanation. – neuronet Jul 29 '16 at 1:20

If the other answers don't help then try:

sudo apt-get install --reinstall synaptic
sudo dpkg-reconfigure synaptic

It worked for me.

forums linuxmint suggests installing apt-xapian-index when the box is present but grayed out. This solution also works in this case where the Quick Filter box is completely missing.

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