Re: hdmi audio only working once (per boot) after upgrading from 256.53 to 260.19.29
same problem here with :
geforce 8200 (MCP78S)
kernel 2.6.36 and 2.6.38.
By the way, it happens also without restarting X it's just a matter of waiting, turn of/on the tv or something. If I boot up my media center I can play any kind of hdmi audio. But after a while (typically the day later even without restarting X) hdmi doesn't send sound anymore. It seems to work (no errors, speaker test runs nicely) but the receiver don't receive anything.