Error not helpful when mate Polkit Agent won't start.

[angelo-fuchs]

I have this message in .xsession-errors
(polkit-mate-authentication-agent-1:26588): polkit-mate-1-WARNING **: Unable to determine the session we are in: No session for pid 26588

and that's the message I get when I try to start it manually:
$ mate-polkit
(polkit-mate-authentication-agent-1:27651): polkit-mate-1-WARNING **: Unable to determine the session we are in: No session for pid 27651

Unfortunately, it does not give any information about what might be the issue.
I assume that the underlying problem is somewhere else, but I can't figure that out from this message. Please improve the message (e.G. "Unable to determinate the session we are in: No session found for pid 4711. Is mate-session-controller running?" or something else that might give away an idea on where to look.)

--- Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/39822595-error-not-helpful-when-mate-polkit-agent-won-t-start?utm_campaign=plugin&utm_content=tracker%2F1587117&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F1587117&utm_medium=issues&utm_source=github).

[kwibus]

i have the same issue, by me it is caused by hidepid mount options for proc. could this be the same for you?

[angelo-fuchs]

I migrated away from mate, so I can't test it.

[thican]

i have the same issue, by me it is caused by hidepid mount options for proc. could this be the same for you?

I got the same issue, and since I set the value of hidepid option to 0 (see proc(5)), I am finally able to mount/dismount an USB, and to halt/reboot/suspend directly from the desktop environment.

Thanks a lot @kwibus for the advice, I can finally enjoy my DE since I changed to elogind instead of consolekit.
About this topic, I was able to get correct permissions with ConsoleKit and hidepid=2.

Best regards,