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…