Authorization failed on locked screen [Solved]

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Authorization failed on locked screen [Solved]

Postby linuxfluesterer » Mon Apr 16, 2018 15:02

Hallo guys.
I had to make a brand new installation on a new SSD. For this I used weekend's Daily-Build with latest Plasma elements, version 5.12.3 and Kernel 4.14. Installation went easy. But when I started to work with the installed Sabayon on SSD now, then I have a severe problem.
- First I boot into login screen, I can enter my password and the Plasma DE is ready to use
- After a while (5 minutes) the screen is locked, so far, so good
- I am asked for my password to unlock again, but after entering my password, I always receive the message:
Code: Select all
Authorization failed

The only way to my locked Plasma session ist the following
1. Change the terminal by pressing <Ctrl-Alt-F2>
2. Login as root
3. Enter the following command to find out which session is my Plasma:
Code: Select all
loginctl list-session
SESSION UID  USER             SEAT             TTY
1       1000 linuxfluesterer  seat0
2          0 root             seat0            /dev/tty2       

then I get a list with root and my own session (1000)
4. to unlock my session then I type:
Code: Select all
loginctl unlog-session 1

(my session has id no. 2)
5. Then I have to press <Ctrl-Alt_F1>
and my Plasma session is unlocked again ... but, this is not the way to solve Authorization failed

So, what is wrong with the login manager, or which program ever handles my username and my password for locked sessions?

Thank you in advance.

-Linuxfluesterer (I love KDE...)
Last edited by linuxfluesterer on Tue Apr 17, 2018 22:12, edited 1 time in total.
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Re: Authorization failed on locked screen

Postby Stupot » Tue Apr 17, 2018 19:36

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Re: Authorization failed on locked screen

Postby linuxfluesterer » Tue Apr 17, 2018 22:11

Stupot wrote:https://forum.sabayon.org/viewtopic.php?f=53&t=33995#p181195

Thank you very, very much, Stupot and to Andy (anomaly65) also. I have searched for the keywords "Authorization failed", so I did not receive this solution in forum's topics.

However, I don't know, what is the reason, why this directory:
Code: Select all
/usr/lib64/libexec/kcheckpass
is not set with 's' by default after fresh install.
I will remember this solution and write it into a to do list for a future install.
Of course, I will mark this thread as [Solved] now.

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Re: Authorization failed on locked screen [Solved]

Postby linuxfluesterer » Thu Apr 19, 2018 14:59

************************* Update ********************************
After upgrading my system to Plasma 5.12.4 (and other components) today, the same problem appears. It is no more possible to login on a locked screen. Something in the upgrade must reset the flag for:
Code: Select all
/usr/lib64/libexec/kcheckpass


The solution is still to enter:
Code: Select all
chmod u+s /usr/lib64/libexec/kcheckpass
as root again. Then it works to relogin.

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