Public bug reported:
I can't use pkexec to launch any graphical applications. Output example:
de...@delan:~$ pkexec /usr/sbin/synaptic
(synaptic:4152): Gtk-WARNING **: cannot open display:
de...@delan:~$
If I set the $DISPLAY variable it still doesn't work:
de...@delan:~$ pkexec bash
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
r...@delan:~# DISPLAY=:0 /usr/sbin/synaptic
No protocol specified
(synaptic:4166): Gtk-WARNING **: cannot open display: :0
r...@delan:~#
However gksu-polkit works:
de...@delan:~$ gksu-polkit /usr/sbin/synaptic
de...@delan:~$
** Affects: ubuntu
Importance: Undecided
Status: New
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pkexec can't open GUI applications but gksu-polkit can
https://bugs.launchpad.net/bugs/615840
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