Hi all, I was wondering if anyone knows of a fix for my iMac 21.5" which seems to disable the onboard sound upon restarting? I understand that this can be remedied by resetting the SMC but I cannot be expected to do this each and every time the machine is restarted. Is there any way I can get it to work permanently? Upon restarting the volume icon is greyed out, and pressing the volume up/down keys bring up the volume box with a "no entry" sign underneath the icon. I've tried unplugging and replugging the external speakers to no avail, and this occurs with the internal speakers also. I've checked the correct device is selected in the volume settings and the optical output is not switched on. Lion really is a sack of ****, isn't it?