timeout in locking authority file /home/username/.Xauthority

check

ls -l ~/.Xauthority

It should be owned by you. If not, run

 sudo chown user ~/.Xauthority 

where user is your username
Then, run

 chmod u+rw ~/.Xauthority

then, retry startx

sumber : https://bbs.archlinux.org/viewtopic.php?id=180471