If you are encountering delays in entering your linux account and instead notice
/usr/bin/xauth: timeout in locking authority file /home/user1/.Xauthority
The Issue is that xauth is trying to open a lock files.
To resolve the issues, first list the file to check whether it exists
% ls -l .Xauthority*
% rm -fr .Xauthority-*
Log off and Log on again.