Ahah, this bug from 2011 is still valid in 2017 with Zesty! Extract from `ps axf` today:
27019 ? Sl 0:00 \_ gdm-session-worker [pam/gdm-password] 27029 tty2 Ssl+ 0:00 \_ /usr/lib/gdm3/gdm-x-session --run-script gnome-session --session=gnome 27031 tty2 Sl+ 1:05 \_ /usr/lib/xorg/Xorg vt2 -displayfd 3 -auth /run/user/1000/gdm/Xauthority -background none -noreset -keep 27035 tty2 S+ 0:00 | \_ /usr/lib/xserver-xorg-video-intel/xf86-video-intel-backlight-helper intel_backlight 27045 tty2 Sl+ 0:00 \_ /usr/lib/gnome-session/gnome-session-binary --session=gnome 27159 tty2 Sl+ 1:12 \_ /usr/bin/gnome-shell ... 27337 tty2 SLl+ 0:10 \_ /usr/bin/gnome-software --gapplication-service 27973 tty2 Sl+ 0:00 \_ update-notifier ... 28014 ? SNl 0:03 /usr/bin/python3 /usr/sbin/aptd 29484 pts/0 SNs+ 0:00 \_ /usr/bin/python3 /usr/sbin/aptd 29502 pts/0 SN+ 0:00 \_ /bin/sh -c /usr/sbin/dpkg-preconfigure --apt || true 29503 pts/0 SN+ 0:00 \_ /usr/bin/perl -w /usr/sbin/dpkg-preconfigure --apt 29505 pts/0 ZN+ 0:00 \_ [dpkg-preconfigu] <defunct> 29491 tty2 S+ 0:00 /usr/bin/perl -w /usr/bin/debconf-communicate -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/856533 Title: Poor feedback, and no ability to escape, when an installation hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/856533/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
