Samba CIFS file "changed on disk" [solved]

[eddymulyono]

I'm having a problem updating file in my CIFS-mounted partition.

Steps to reproduce:

1. Open a text editor (e.g. gedit or emacs)
   
2. Enter some text ("test")
   
3. Save ("test.txt")
   
4. Enter some more text ("test again")
   
5. Save
   

Expected:
"test.txt" updated

Problem:
gedit: "The file /home/eddy/test.txt has been modified since reading it. If you save it, all the external changes could be lost. Save it anyway? Save Anyway. Don't Save."
emacs: "test.txt changed on disk; really edit the buffer? (y, n, r or C-h)"

Workaround:
gedit: Click "Save Anyway".
emacs: Type 'y'.

This happens every time I update the file.

My samba server:

[eddymulyono]

Apparently, it's caused by a time-synchronization problem. I fixed it by running /etc/init.d/ntpd on both client and server.