[alsa-devel] HDA Beep Device for Asus EeeBox EB1501P

[Takashi Iwai]

At Tue, 5 Mar 2013 09:20:07 +0100,
Harald Becker wrote:
> 
> Hi Takashi !
> 
> Just to inform you ...
> 
> 25-02-2013 09:56 Takashi Iwai <tiwai at suse.de>:
> 
> > > > > If I use echo -e "\a" in a shell or run the beep command
> > > > > utility the sound appears only on second and following
> > > > > invocations. Whenever the frequency changes with the beep
> > > > > command the first invocation stays silent or just produce some
> > > > > click due to ALSA driver power saving. On all further
> > > > > invocations with same frequency the requested tone is generated
> > > > > on external speakers. There is no difference in behavior if the
> > > > > commands are called in a terminal emulator or directly on a
> > > > > virtual text console.
> 
> The problem reoccurred with kernel 3.8.2. As my box is currently very
> busy, I can't do rapid rebooting. As soon as this is possible, I try to
> create a step by step description on how to reproduce the problem.
> 
> > > > So, the behavior above disappears if you disable the power save?
> 
> Some quick tests showed you are probably right and the problem depends
> on the power saving feature. Beeps are produced as long as power saving
> (timeout) has not occurred, and beep misses if device is in power
> saving mode.

Did you try my previous patch?

> As soon as my box is ready for rapid rebooting I will dig somewhat
> deeper into this.

OK, thanks.


Takashi