I have installed Fedora 17 on my laptop. A few days ago I updated my fedora (but not upgraded). I shut down my computer and since the next time I turned it on I am hearing a clicking noise all the time from speakers. Even when I plug my headphones in I hear the noise through the headphone. I surfed over the internet and found the following shell commands:

su -c 'echo "options snd_hda_intel power_save=0" > /etc/modprobe.d/snd_hda_intel.conf'
su -c 'echo 0 > /sys/module/snd_hda_intel/parameters/power_save'

I tried them but they didn't work. Here is the part of "lspci" command related to my sound-card:

00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller (rev 03)

I have to add that my sound-card is working and I can play some audio file, I mean I can hear the voice and noise simultaneously. But everything is OK in windows xp which is also installed on my laptop.

Could it be related to the sound-card driver? If so, how can I revert it to the previous version?