Dev1 Galaxy Forum / Superuser authentication failure in graphical mode

Re: Superuser authentication failure in graphical mode

dummy@example.com (delgado) — Sun, 11 Jan 2026 22:26:21 +0000

Hi,
I'm on freia too and had authentication errors until yesterday. The error message was - in my case:
"Incorrect permission on/usr/lib/policykit-1/polkit-agent-helper-1(need to setuid root)"

The solution from
https://askubuntu.com/questions/1115061 … ent-helper
= sudo chmod 5755 /usr/lib/policykit-1/polkit-agent-helper-1 fixed it.

Edit:
There is a discussion respective other permissions to apply - I do not know such stuff.

Re: Superuser authentication failure in graphical mode

dummy@example.com (Dutch_Master) — Sun, 11 Jan 2026 21:53:37 +0000

That's why it's called testing Don't use testing if you can't fix it.

Superuser authentication failure in graphical mode

dummy@example.com (devuanitaviejo) — Sun, 11 Jan 2026 21:26:18 +0000

Greetings community!

I am using the testing version, Freia, and I have noticed that every time I enter an application that requires superuser privileges, such as synaptic or gparted, authentication fails. As soon as I enter, the error window opens in a loop and closes. I can't even type anything. Luckily, I can log in as superuser in the terminal. I checked the disk space and there is enough space on all partitions. I have no idea what the problem is.

I would appreciate some help.