I am using Ubuntu 11.10. And I always depend on synaptic to install new software because I can't remember most of the software packages' names correctly. But Today, my freshly installed Synaptic in my freshly installed Ubuntu 11.10 just don't give any result of the filter. I can still use search box to find packages, but it not as convenient for sure. So, does anyone here knows a possible solution for that. Thank you in advance.
Also the same issue may appear in 16.04+ releases. (Re)installing the package apt-xapian-index may solve the problem. See related Ubuntu forums topic.