Comment 2 for bug 386961

an experimental workaround for this problem: wrapper script for pptp

сd /usr/sbin
sudo mv pptp pptpo
sudo nano pptp

insert these two lines there:

#!/bin/bash
/usr/sbin/pptpo $1 $2 $3 $4 $5 $6 $7 $8 $9 --nobuffer --loglevel 0

save and give launch permissions:

sudo chmod +x pptp