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

[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,

[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.