Problem when using fai (2.5.4 and 2.6) and verbose option

[Sébastien GALLET]

hi
When i use the verbose option in fai, the installation "freeze" after 
installing softwares.
Seems like system waits for something ... but don't know what.
Everything is ok when not using verbose option.

output in software.log
/usr/sbin/install_packages: is executing chroot /tmp/target apt-get clean
/usr/sbin/install_packages: is executing chroot /tmp/target dpkg 
--configure --pending
/usr/sbin/install_packages: is executing chroot /tmp/target dpkg -C
/usr/sbin/install_packages: is executing chroot /tmp/target apt-get clean

output of faimond
ibotest_matrix TASKEND updatebase 0
ibotest_matrix HOOK instsoft.BASE
ibotest_matrix TASKBEGIN instsoft