Thank you for taking the time to report this bug and helping to make Ubuntu better.
The relevant dpkg terminal log:
```
Use of uninitialized value $reply in scalar chomp at /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 66.
Use of uninitialized value $reply in concatenation (.) or string at /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 67.
Use of uninitialized value $reply in split at /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 68.
Use of uninitialized value $reply in scalar chomp at /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 66.
Use of uninitialized value $reply in concatenation (.) or string at /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 67.
Use of uninitialized value $reply in split at /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 68.
Use of uninitialized value $reply in scalar chomp at /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 66.
Use of uninitialized value $reply in concatenation (.) or string at /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 67.
Use of uninitialized value $reply in split at /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 68.
Use of uninitialized value $ret in string eq at /usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 109.
```
This particular bug has already been reported and is a duplicate of bug #500175, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.
Thank you for taking the time to report this bug and helping to make Ubuntu better.
The relevant dpkg terminal log:
``` perl5/Debconf/ FrontEnd/ Passthrough. pm line 66. perl5/Debconf/ FrontEnd/ Passthrough. pm line 67. perl5/Debconf/ FrontEnd/ Passthrough. pm line 68. perl5/Debconf/ FrontEnd/ Passthrough. pm line 66. perl5/Debconf/ FrontEnd/ Passthrough. pm line 67. perl5/Debconf/ FrontEnd/ Passthrough. pm line 68. perl5/Debconf/ FrontEnd/ Passthrough. pm line 66. perl5/Debconf/ FrontEnd/ Passthrough. pm line 67. perl5/Debconf/ FrontEnd/ Passthrough. pm line 68. perl5/Debconf/ FrontEnd/ Passthrough. pm line 109.
Use of uninitialized value $reply in scalar chomp at /usr/share/
Use of uninitialized value $reply in concatenation (.) or string at /usr/share/
Use of uninitialized value $reply in split at /usr/share/
Use of uninitialized value $reply in scalar chomp at /usr/share/
Use of uninitialized value $reply in concatenation (.) or string at /usr/share/
Use of uninitialized value $reply in split at /usr/share/
Use of uninitialized value $reply in scalar chomp at /usr/share/
Use of uninitialized value $reply in concatenation (.) or string at /usr/share/
Use of uninitialized value $reply in split at /usr/share/
Use of uninitialized value $ret in string eq at /usr/share/
```
This particular bug has already been reported and is a duplicate of bug #500175, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.