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From: jidanni on 14 Apr 2010 12:10
>>>>> "DI" == Damyan Ivanov <dmn(a)debian.org> writes:

DI> -=| jidanni(a)jidanni.org, Thu, Apr 08, 2010 at 10:14:23AM +0800 |=-
>> Gentlemen, it's driving me bananas. Why am I not getting all the beeps I
>> am entitled to here on my EEEPC 702 8G?
>> $ n=1; while sleep 2; do echo $((n++)); beep -r 4; done
>> $ n=1; while sleep 2; do echo $((n++)); beep; done
>> For each few beeps, there is one or two not heard.

DI> Aggressive sound card auto-suspending? What happens if the delay is
DI> 0.5 for example?

7 beeps OK, 8th always very low volume. Being root, or using tty1 gives
no improvement. modprobe pcspkr no help.

The first few seconds of
$ beep -l 11111
are normal, the remainder very low volume. The number of seconds vary.
How does one toggle auto-suspending, if indeed that is the problem?

/dev/sndstat:
Sound Driver:3.8.1a-980706 (ALSA v1.0.21 emulation code)
Kernel: Linux jidanni3 2.6.32-3-686 #1 SMP Thu Feb 25 06:14:20 UTC 2010 i686
Config options: 0

Installed drivers:
Type 10: ALSA emulation

Card config:
HDA Intel at 0xf7eb8000 irq 16

Audio devices: NOT ENABLED IN CONFIG

Synth devices: NOT ENABLED IN CONFIG

Midi devices: NOT ENABLED IN CONFIG

Timers:
31: system timer

Mixers: NOT ENABLED IN CONFIG


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From: Damyan Ivanov on 16 Apr 2010 00:40
-=| Trent W. Buck, Fri, Apr 16, 2010 at 12:35:33PM +1000 |=-
> jidanni(a)jidanni.org writes:
>
> > The first few seconds of
> > $ beep -l 11111
> > are normal, the remainder very low volume. The number of seconds vary.
> > How does one toggle auto-suspending, if indeed that is the problem?
>
> I believe one does it by writing to
> /sys/module/snd_hda_intel/parameters/power_save. In bash:
>
> sudo tee <<<0 /sys/module/snd_hda_intel/parameters/power_save # turn it off
> sudo tee <<<1 /sys/module/snd_hda_intel/parameters/power_save # turn it on
>
There is also a module parameter that could be set from
/etc/modprobe.d. See 'sudo modinfo snd-hda-intel'.

I seem to have the following in /etc/modprobe.d/eeepc.conf:

options snd_hda_intel power_save=5 model=eeepc-901
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