Comment # 1 on bug 1090760 from Takashi Iwai

Could you give the hardware details? Such a problem is very much
hardware-specific.

At least, please give hwinfo output (attach to Bugzilla).  Also, run
alsa-info.sh with --no-upload option, and attach the output, too.

Also note that it's often difficult to eliminate such a click when you perform
the power-saving mode.