Dec 20 18:06:10 CreaAcer pkexec: pam_unix(polkit-1:session): session opened for user root by (uid=1000)
Dec 20 18:06:10 CreaAcer pkexec: pam_systemd(polkit-1:session): Cannot create session: Already running in a session
Dec 20 18:06:10 CreaAcer pkexec[20618]: ggalinec: Executing command [USER=root] [TTY=unknown] [CWD=/home/ggalinec] [COMMAND=/usr/sbin/mate-power-backlight-helper --set-brightness 122]
Dec 20 18:06:10 CreaAcer unix_chkpwd[20636]: password check failed for user (ggalinec)
Dec 20 18:06:10 CreaAcer mate-screensaver-dialog: pam_unix(mate-screensaver:auth): authentication failure; logname= uid=1000 euid=1000 tty=:0.0 ruser= rhost=  user=ggalinec
Dec 20 18:06:53 CreaAcer mate-screensaver-dialog: message repeated 21 times: [ pam_unix(mate-screensaver:auth): authentication failure; logname= uid=1000 euid=1000 tty=:0.0 ruser= rhost=  user=ggalinec]
Dec 20 18:06:56 CreaAcer unix_chkpwd[20915]: password check failed for user (ggalinec)
Dec 20 18:06:56 CreaAcer mate-screensaver-dialog: pam_unix(mate-screensaver:auth): authentication failure; logname= uid=1000 euid=1000 tty=:0.0 ruser= rhost=  user=ggalinec
Dec 20 18:07:32 CreaAcer unix_chkpwd[20937]: password check failed for user (ggalinec)
Dec 20 18:07:32 CreaAcer mate-screensaver-dialog: pam_unix(mate-screensaver:auth): authentication failure; logname= uid=1000 euid=1000 tty=:0.0 ruser= rhost=  user=ggalinec
Dec 20 18:08:59 CreaAcer mate-screensaver-dialog: message repeated 43 times: [ pam_unix(mate-screensaver:auth): authentication failure; logname= uid=1000 euid=1000 tty=:0.0 ruser= rhost=  user=ggalinec]
Dec 20 18:09:01 CreaAcer CRON[21275]: pam_unix(cron:session): session opened for user root by (uid=0)
Dec 20 18:09:01 CreaAcer CRON[21275]: pam_unix(cron:session): session closed for user root
Dec 20 18:09:02 CreaAcer mate-screensaver-dialog: pam_unix(mate-screensaver:auth): authentication failure; logname= uid=1000 euid=1000 tty=:0.0 ruser= rhost=  user=ggalinec
Dec 20 18:14:52 CreaAcer mate-screensaver-dialog: message repeated 170 times: [ pam_unix(mate-screensaver:auth): authentication failure; logname= uid=1000 euid=1000 tty=:0.0 ruser= rhost=  user=ggalinec]