On the arch forums, I found a solution to the problem which works fine here: https://bbs.archlinux.org/viewtopic.php?id=129187 .
I am aware of Debian not being Arch Linux, but I thought that the forum entry may help you fixing the bug for Debian.
Regards, Matthias -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]

