hda-intel: MSI + controller power savings issue

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Hello,

I'm running current Debian testing (Wheezy), KDE with pulseaudio, with
the latest Liquorix kernel (3.7.0-1.dmz.6-liquorix-amd64) on a Clevo
W150HRM laptop (Realtek ALC269VB codec).

As soon as I unplug ac, the hda_intel power saving features get turned
on by the /usr/lib/pm-utils/power.d/intel-audio-powersave script
supplied by the pm-tools package, which echoes "1" to
/sys/module/snd_hda_intel/parameters/power_save; after that, and until I
disable hda_intel power savings, all the sounds I get are prolonged and
interrupted by pauses of silence. I'm quite sure that this issue wasn't
present before 3.7 kernel.

Either disabling MSIs or disabling controller power savings seem to fix
the issue (I'm currently running with enable_msi=0).

Any idea?

Thanks


Maurizio

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