Possible Duplicate:
Tab completion doesn't work for commands
The installed packages prompt is working fine, eg, gedtab completes to gedit, but package autocomplete on apt-get is not showing list of matching packages, like, sudo apt-get install gedtab won't try to fit ged* packages as it normally should. Similarly, quicklytab pops files and folders in the current directory instead of prompting "commands , create, etc".
Any way of correcting this? And yes, I'm on Ubuntu 12.04.