Have been following the discussion, but have some differences.

I like to use

sudo -A /usr/sbin/gparted %f

Have this in the desktop file, also. But it needs some configuration of sudo

cat > /etc/sudo.conf << "EOF"
# Path to askpass helper program

and the ask-pass program from openssl for the x-dialog, as I included a
quick suggestion in gparted page.

Can use sudo -A for any graphical program, from an "execute" dialog
(present in lxde menu) or .desktop file. Just that sudo.conf
configuration will work for all. This is particularly more simple than
haven a polkit file for each package that needs rot privilege.

But wanted to understand the polkit way.

Can run from terminal

pkexec gparted

get the x-dialog, all is fine.

>From the menu, nothing happens, no message in any log, including the

Then, compared with

Ubuntu: /usr/bin/gparted-pkexec
ArchLinux: /usr/bin/gparted_polkit

Then, created as in Arch:

gparted.desktop: (many lines, with, below, the important one)
Exec=/usr/sbin/gparted_polkit %f

$ cat /usr/sbin/gparted_polkit
if [ $(which pkexec) ]; then
    pkexec --disable-internal-agent "/usr/sbin/gparted" "$@"
    /usr/sbin/gparted "$@"

This works. The polkit fle, of course, gives root privilege to gparted,
not to gparted_polkit.

Why is that, I do not know.

Another which woks is the .desktop installed by gparted, if I change:


But then, first, a terminal appears and the the x-dialog is launched.

However, now, I have polkit working as expected with Linux-PAM and
consolekit, and for the first time, since I stopped using HAL, I have a
complete logout dialogue in LXDE, with all options, Shutdown and Reboot
working as they should.

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