Re: [alsa-devel] HD-audio runtime PM

On 11/22/2013 12:57 PM, Takashi Iwai wrote:

Hi,

after my previous fix, the runtime PM seems working stably finally. However, there seem still some glitches:

1. The wakeup via jack or HDMI/DP detection doesn't seem to work on my

test machines. WAKEEN is set properly. And its value can be read correctly at the point of runtime resume, too.

Hi and thanks for working on this.

I've been trying to reproduce the above, but I can't seem to activate runtime PM at all. I can't seem to get a callback to runtime_suspend, and further investigation shows that /sys/class/sound/card0/power/runtime_status shows "unsupported".

And this is on 3.13-rc1, and there *shouldn't* be any Ubuntu specific stuff or configuration in that kernel.

Any ideas? (Sorry if this is a newbie question..)