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after i executed unity-greeter command in terminal, my theme changed into classic gnome and my icons too. and even some of my icons have been deleted ! i tried to change some files like /etc/lightdm/unity-greeter.conf to change defaults of my session but it was useless . can anyone help me to revert my settings back ?

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Can you post your /etc/lightdm/lightdm.conf? Will you get the old session back if you log out and re-log in choosing the correct session manager (gnome-shell or unity I suppose)? – jasmines Jun 5 '12 at 15:44
i have copied an original copy of lightdm.conf ( i had backed it up before any changes ) to /etc/lightdm/lightdm.conf but no change was made – Mohammad Mahdi Mokhtari Jun 5 '12 at 17:13
You're answering to some other question... – jasmines Jun 5 '12 at 18:33
@jasmines No. The OP is answering the same question. – hexafraction Aug 14 '12 at 19:41

Check the answers to a similar problem I had. Quoting from there:

sudo killall compiz && compiz --replace

Hopefully it will solve your problem as well.

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You could try unity --reset as well. :-)

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i tried it but no change was made :( – Mohammad Mahdi Mokhtari Jun 5 '12 at 17:14

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