[Bug 1535058] Re: applications close instantly when launched from the launcher or dash

[Antoine Monmayrant]

Here is an example of a launcher that fails:

sudo apt install scilab
/usr/share/applications/scilab.desktop 
exo-open /usr/share/applications/scilab.desktop 
# scilab opens and closes immediatly

Mitigation:
sudo vim /usr/share/applications/scilab.desktop 
-Exec=scilab -f %f
+Exec=xterm -e scilab -f %f
exo-open /usr/share/applications/scilab.desktop 
# both xterm and scilab open and scilab works as expected

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https://bugs.launchpad.net/bugs/1535058

Title:
  applications close instantly when launched from the launcher or dash

Status in Canonical System Image:
  Fix Released
Status in cgmanager package in Ubuntu:
  Incomplete
Status in qtmir package in Ubuntu:
  Invalid
Status in ubuntu-app-launch package in Ubuntu:
  Fix Released
Status in unity8 package in Ubuntu:
  Invalid
Status in unity8-desktop-session package in Ubuntu:
  Invalid
Status in upstart package in Ubuntu:
  Invalid

Bug description:
  xenial
  applications close instantly when launched from the launcher or dash
  but... if i launch the apps from a VT (for ex firefox using Xmir or gedit native --), the app loads ok.

  what close instantly means.. it opens the window and then it closes
  instantly in ~0.3s

  -----------------------------------

  This has been traced to two causes:
  pam was not installed, it is now a dependency of ubuntu-app-launch or can be installed directly
  $ sudo apt-get install libpam-cgfs

  and cgmanager is not enabled by default on systems that were upgraded
  and not clean installs. To enable it

  $ sudo systemctl enable cgmanager

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