[Bug 1828663] Re: lubuntu 19.04 QT interfaces not properly working where more then one sudoer configured

[TJ]

I've found that there appears to be a fundamental bug in policykit and
have added the upstream bug report covering it, which has been around
for several years but the developers don't seem able to come up with a
fix for.

Tests done using the Lubuntu 19.10 Live ISO (June 24th 2019 build) where
an additional user "test" is created with the same supplementary group
memberships as the "lubuntu" user. Both have passwords set so that these
tests can be done over SSH as well as at the console, or in the GUI.

The fact that "pkexec" itself is broken proves that lxqt nor the qt-
policykit code is at fault here.

test at lubuntu:~$ groups
test adm cdrom sudo dip plugdev lpadmin

$ sudo ls -l /root/
[sudo] password for test: 
total 0
-rw-r--r-- 1 root root 0 Jun 26 23:35 file

test at lubuntu:~$ pkexec ls -l /root/

==== AUTHENTICATING FOR org.freedesktop.policykit.exec ===
Authentication is needed to run `/usr/bin/ls' as the super user
Multiple identities can be used for authentication:
 1.  Lubuntu2,,, (lubuntu)
 2.  Test3,,, (test)
Choose identity to authenticate as (1-2): 2
Password: 
polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie


lubuntu at lubuntu:~$ groups
lubuntu adm cdrom sudo dip plugdev lpadmin sambashare

lubuntu at lubuntu:~$ sudo ls -l /root/
total 0
-rw-r--r-- 1 root root 0 Jun 26 23:35 grep

lubuntu at lubuntu:~$ pkexec ls -l /root/
Error executing command as another user: Not authorized

This incident has been reported.


** Summary changed:

- lubuntu 19.04 QT interfaces not properly working where more then one sudoer configured
+ policykit failures due to internal user id mismatch

** Changed in: lubuntu-meta (Ubuntu)
       Status: In Progress => Invalid

** Changed in: lxqt-policykit (Ubuntu)
       Status: Confirmed => Invalid

** Changed in: policykit-1 (Ubuntu)
       Status: New => Confirmed

** Changed in: lubuntu-meta (Ubuntu)
     Assignee: TJ (tj) => (unassigned)

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https://bugs.launchpad.net/bugs/1828663

Title:
  policykit failures due to internal user id mismatch

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