Comment 5 for bug 297976

I can confirm the bug with kde4.2.1 as provided by "deb http://ppa.launchpad.net/kubuntu-experimental/ubuntu intrepid main" in /etc/apt/sources.list. I reacently upgraded for 8.04 to 8.10.

There are at least theses 2 bug reports, which seem to be related:
https://bugs.launchpad.net/bugs/262748
https://bugs.launchpad.net/bugs/268951

Temporary workaround (see link in comment 3 and 4):
End kmail (or whatever is supposed to ask for the passphrase) and from a console:
$ eval "$(gpg-agent --daemon)"
$ kmail

Permanent Workaround (untested):
Put "$(gpg-agent --daemon)" into /.kde/env/gpgagent.sh

In my humble opinion, all the bug reports, including this one, are assigned to the wrong packages (kdepim, gnupg, enigmail). As nobody with another desktop environment than KDE seems to have a problem (??), some KDE-package (kdebase* or kdelibs*) might be more appropriate.

As the issue seems to be unsolved for more than 3 months and the bug renders the system unusable for sending signed and reading encrypted mails for a 'normal' user, being a regression from 8.04, one might consider to change the importance of the bug.

Some system information:
gnupg 1.4.9-3ubuntu1
gnupg-agent 2.0.9-3.1
gnupg2 2.0.9-3.1
gpgsm 2.0.9-3.1
gpgv 1.4.9-3ubuntu1
kdebase-bin 4:4.2.1-0ubuntu1~intrepid2
kdebase-data 4:4.2.1-0ubuntu1~intrepid2
kdelibs-bin 4:4.2.1a-0ubuntu1~intrepid1
kdelibs5 4:4.2.1a-0ubuntu1~intrepid1
kdepimlibs5 4:4.2.1-0ubuntu1~intrepid1
pinentry-qt 0.7.5-2ubuntu1
pinentry-qt4 0.7.3+svn799201-1ubuntu1
# update-alternatives --display pinentry
 link currently points to /usr/bin/pinentry-qt4
$ im-switch -l
Your input method setup under en_GB locale as below.
=======================================================
No private "~/.xinput.d/en_GB or ~/.xinput.d/all_ALL" is defined.
=======================================================
The system wide default is pointed by "/etc/alternatives/xinput-all_ALL" .