Everytime I login with my own accounts, GDM say that:
"Your $Home/.dmrc file has incorrect permission. This prevent previous sessions and language from being load. The file should be owned by the user and have 644 permission"

I have checked that file thoroughly.
I is owned by me, it has 644 permission.
Its contain is
Root account work fine. I don't understand, what 's wrong with it

I suspect that the error message is itself in error, and the permissions should be either 640 or 600. Try: "chmod 640 .gmrc" if your group is the same as your username, or "chmod 600 .gmrc" if your default group is "users".

Neither 644 nor 640 nor 600 work.
And by the way, the /root/.dmrc has 644 permission and it work. Mine doesn't work anyway

In my /home/doc folder: (my regular user)

drwxr-xr-x 39 doc doc 4096 2006-04-26 03:55 .
-rw------- 1 doc doc 26 2006-04-10 07:50 .dmrc

your 'power' user often has its own group, and wont need to be a member of 'users'... usualy root will want to load gdm (in an init script) thus not allowing the regular users to kill it (this is the point of graphical login) .. you can always later kill it using sudo killall gdm , or by stopping the script (i.e. # sudo /etc/init.d/gdm stop or simply gdm stop). I dont do this since I dont require a graphical login (whats wrong with startx at the prompt?)

good luck
DrS

I still refuse to work guys.
I have changed the .dmrc file many three times, here is it:
None of them work, the annoying popup dialog box still appear each time I enter the username and password. Though I can login after press enter at that dialog box but it is really annoyed

There is a PAM_HOMECHECK module that checks whether your home directory or certain dot files are world writable.
Could you check the permissions of your home directory itself?

My home directory have the permission:

I change my home directory permission to 700 and it works.
Thank for your remind jschiwal