The file does not exist, which is why the commands are not working!
chown: cannot access '//.ICEauthority':
No such file or directory
If you haven't rebooted since you fixed the .dmrc error I would try that first. If you have and still get the .ICEauthority warning, here is something you can try:
A few users recommend booting to the recovery mode root prompt and removing the .ICEauthority and .Xauthority files. (I recommend renaming them instead in case you need to restore them.) I know you don't appear to even have an .ICEauthority file, but I would run them anyway.
(Added: I have just done this on my own computer with no ill effects. It creates new files. I also noted it creates 600 permissions so I've modified the earlier post accordingly.)
Code:
mv /home/jpinson/.ICEauthority /home/jpinson/.ICEauthority.backup
mv /home/jpinson/.Xauthority /home/jpinson/.Xauthority.backup
reboot now
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