Comment 8 for bug 1283014

$ cat ~/.gnupg/gpg-agent.conf

pinentry-program /usr/bin/pinentry-kwallet
no-grab
default-cache-ttl 1800

# sudo edit /usr/bin/pinentry-kwallet, set iodebug=1

# test
$ echo "test" | gpg -ase -r 0x0A1B2C3D | gpg

# 3 times the same bug report window opens
# on the 4th time pinentry-qt is started as fallback

$ cat ~/pinentry-kwallet.debug

9729 === new Mon Aug 25 14:04:31 CEST 2014
9729 LOG argv[1]='--display'
9729 LOG argv[2]=':0'
9729 LOG starting coproc 0: PINENTRY_KWALLET=set 'pinentry' args
9729 <s OK Your orders please
9729 LOG have_sub=1
9729 >p OK ready to listen to your demands
9729 <p OPTION no-grab
9729 >s OPTION no-grab
9729 <s OK
9729 >p OK
9729 <p OPTION ttyname=/dev/tty
9729 >s OPTION ttyname=/dev/tty
9729 <s OK
9729 >p OK
9729 <p OPTION ttytype=xterm
9729 >s OPTION ttytype=xterm
9729 <s OK
9729 >p OK
9729 <p OPTION lc-ctype=en_US.UTF-8
9729 >s OPTION lc-ctype=en_US.UTF-8
9729 <s OK
9729 >p OK
9729 <p OPTION lc-messages=en_US.UTF-8
9729 >s OPTION lc-messages=en_US.UTF-8
9729 <s OK
9729 >p OK
9729 <p OPTION default-ok=_OK
9729 >s OPTION default-ok=_OK
9729 <s OK
9729 >p OK
9729 <p OPTION default-cancel=_Cancel
9729 >s OPTION default-cancel=_Cancel
9729 <s OK
9729 >p OK
9729 <p OPTION default-prompt=PIN:
9729 >s OPTION default-prompt=PIN:
9729 <s OK
9729 >p OK
9729 <p OPTION touch-file=/tmp/gpg-7V8por/S.gpg-agent
9729 >s OPTION touch-file=/tmp/gpg-7V8por/S.gpg-agent
9729 <s OK
9729 >p OK
9729 <p GETINFO pid
9729 >p D 9729
9729 >p OK
9729 <p SETDESC Sie benötigen eine Passphrase, um den geheimen Schlüssel zu entsperren.%0ABenutzer: "Hans Wurst (Bemerkung) <email address hidden>"%0A4096-bit RSA Schlüssel, ID 0A1B2C3DC, erzeugt 2013-01-01%0A
9729 >s SETDESC Sie benötigen eine Passphrase, um den geheimen Schlüssel zu entsperren.%0ABenutzer: "Hans Wurst (Bemerkung) <email address hidden>"%0A4096-bit RSA Schlüssel, ID 0A1B2C3DC, erzeugt 2013-01-01%0A
9729 <s OK
9729 >p OK
9729 <p SETPROMPT Passphrase
9729 >s SETPROMPT Passphrase
9729 <s OK
9729 >p OK
9729 <p GETPIN
9729 LOG read errcnt failed
9729 LOG read pass 255: ''
9729 >s GETPIN
9729 <s ERR 83886179 canceled
9729 >p ERR 83886179 canceled
9729 <p BYE
9729 >p OK
9729 >s BYE
9729 <s OK closing connection