3

After the OS is running for a while, it may trigger for a bug that caused pkexec (including any application that use it, including synaptic) to hang. This can only be recovered from relaunching OS or gnome-shell.

This is a screenshot that describe this situation:

xhost +si:localuser:root
pkexec synaptic

enter image description here

I remember the same error in Manjaro with gnome 3.28, it disappeared in gnome 3.30. How do I backport the fix (if there is any) to Ubuntu 18.04?

UPDATE 1

these are my desktop environment:

$ export | grep XDG_SESS
declare -x XDG_SESSION_DESKTOP="ubuntu"
declare -x XDG_SESSION_ID="1"
declare -x XDG_SESSION_TYPE="x11"

... and synaptics version

$ apt-cache policy synaptic
synaptic:
  Installed: 0.84.3ubuntu1
  Candidate: 0.84.3ubuntu1
  Version table:
 *** 0.84.3ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status
peng@peng-ThinkPad-P51s:~$

UPDATE 2: it appears that it is caused by an unknown bug in gnome authentication agent, as I switched to XFCE and this problem never happens again, so now the problem becomes: how to get rid of the gnome authentication agent?

tribbloid
  • 111
  • Are you running Wayland? What graphical session do you use? Please add output of export | grep XDG_SESS to the question. What is the version of Synaptics? Add output of apt-cache policy synaptic to the question. Have you read this Q&A? I can't reproduce your issue on clean 18.04 LTS with Unity, Ubuntu and GNOME FlashBack sessions (with all sorts of Xorg and Wayland). Do you have GNOME related PPAs? – N0rbert Jan 20 '19 at 08:57
  • I myself sometimes cannot reproduce it, it only appears after running for a while after resuming from sleep – tribbloid Jan 30 '19 at 23:28
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    When it happens I would check journalctl -xe for clues. If system froze after reboot use journalctl -b-1 and then press End key. – WinEunuuchs2Unix Apr 13 '19 at 02:01

0 Answers0