incoming call ring volume ( sound - silent - vibrate ) I used to be able to change the incoming call ring volume from sound to silent to vibrate using the volume buttons. Today I went to Sound settings and unticked "Audible touch tones" and since that I cannot use  the silence mode. Only volume or vibrate is available. 

any idea how to make it back to sound &lt;-> silent &lt;-> vibrate 



HTC Desire on CM7
I don't think the Audible Touch Tones menu item is actually related, since that controls whether or not you hear dial pad tones when dialing a number.

The setting you want should be CyanogenMod Settings-&gt;Sound-&gt;Silent State, and you'll just need to make sure that it's checked. I have Audible Touch Tones disabled as well, but it doesn't interfere with my ability to enable/disable the Silent State option.