Can not play audio with screen off

From	Pavel Machek <pavel@ucw.cz>
Newsgroups	linux.kernel
Subject	Can not play audio with screen off
Date	2016-05-16 04:10 +0200
Message-ID	<rzg8S-u7-139@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi!

I'm playing some more with N900, this time I'd like to use it as a
alarm clock...

And now I realized I can not, because system performance is so
horrible with screen off that mpg123 + pulseaudio skips horribly. This
is without tweaking serial parameters, so CPU is definitely not going
into the idle/off modes.

Loading CPU fixes the issue (I used cat /dev/zero > /dev/null).

Hmm. And it seems to work better if I ssh in and launch mpg123
remotely. Weird.

Kernel 4.5-rc0. Will try on different ones.

Any ideas? Is there interface to tell kernel that better performance
is needed for a while?

Thanks,

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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Can not play audio with screen off Pavel Machek <pavel@ucw.cz> - 2016-05-16 04:10 +0200
  Re: Can not play audio with screen off Nishanth Menon <nm@ti.com> - 2016-05-16 16:30 +0200
    Re: Can not play audio with screen off Pavel Machek <pavel@ucw.cz> - 2016-05-16 17:10 +0200
      Re: Can not play audio with screen off Pavel Machek <pavel@ucw.cz> - 2016-05-24 21:50 +0200

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