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The output of your command "$ w" is:

 15:44:08 up 29 days, 19:47,  2 users,  load average: 0.00, 0.00, 0.00
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU  WHAT
gdm      tty1     -                24Jul25 29days 33:21   0.33s /usr/bin/gjs -m /usr/share/gnome-shell/org.gnome.ScreenSaver
gdm      tty1     -                13Jul25 29days 33:21   0.33s /usr/bin/gjs -m /usr/share/gnome-shell/org.gnome.ScreenSaver