cound not update .ICEauthority

It remind me of “cound not update /home/$user/.ICEauthority”,when I boot my laptop.what does the /home/$user/.ICEauthority do?

Remove the file as root.

you probably logged into KDE/Gnome or other as root, right?

it often happens (among other terrible stuff that can happen if you do
that) that the access permissions of /home/[user]/.ICEauthority gets
changed from what it should be to root ownership…

if that happens it becomes impossible to log in as that user…

do NOT log into KDE/Gnome or other as root…ever…