no beep any more (SOLVED)

Matthias Apitz guru at
Wed Aug 3 19:17:01 UTC 2016

El día Wednesday, August 03, 2016 a las 09:27:40AM -0400, James B. Byrne escribió:

> On Tue, August 2, 2016 11:59, Ian Smith wrote:
> l glad you managed to solve it, despite our 'help' :)
> >
> > Two questions: Do values apart than 50 provide different beep volumes,
> > or is it off/on?  And does 'kldload speaker ; spkrtest' work with it?
> >
> I am guessing that 50:50 is the balance between right and left.  So 0
> :0 is nothing. 50:00 might be 50% left 0% right and so forth.

yes, correctly

> Are values greater than 100 permitted?

no, this is a percentage value; check mixer(1) man page;

btw: I have here some funny dialog from the ChromeOS forum where I asked
for some help, not about software but hardware of the C720; it seems
that they do not like that FreeBSD is installed on their beloved
Chromebook :-)

funny to read:!topic/chromebook-central/-MXyMACfcCU;context-place=forum/chromebook-central

Matthias said:


The (high-resolution) picture of the mother board of the C720, which can
be found here
shows right of the screw 7 a black 2-wire cable, connected to the
motherboard and ending below in some black cylinder. Is this cylinder
the PC-speaker of the C720 (I'm not talking about the stereo laud
speakers) and if so, of which type/manufacture it is? Or is this some
kind of backup battery?

Jim Dantin said:

It's a capacitor that is too large to fit on the circuit board, so they
mounted it on a cable. You can see a second cable with two capacitors
directly above the battery to the left of screw 6.

Replacement ones are commonly available on eBay if you need one.


powermatt said:

In addition to what Jim said; we don't support alternative uses of
Chrome OS hardware for the same reason we don't support third-party
applications; there's no way we could ever cover or know about every
possible interaction of Chrome OS hardware and software. It's not a
reasonable expectation.

Matthias said:

Well, I say thanks for all the comments, the helping ones and the
others, and I could solve the problem with a simple command 'mixer igain 50'.
Re/ the word 'Chromebook', I think that the Acer C720 is such a nice
hardware that it deserves something better than ChromeOS.

powermatt said:

It seems to me you should have purchased a device that better suits
your needs, rather than trying to force a Chromebook to be something it
is not.

Matthias said:

Wrong conclusion of my post; the Acer C720 is one of the best netbooks
I ever purchased and it works fine with FreeBSD.

powermatt said:

You are of course entitled to your opinion.

As this topic does not cover a supported use of the hardware, I am
going to lock it here.

Matthias Apitz, ✉ guru at, ⌂  ☎ +49-176-38902045
"Wer übersieht, dass wir uns den anderen weggenommen haben und sie uns wiederhaben wollen,
kann von den Kämpfen der letzten Tage keinen verstehen. Und kann natürlich auch keinen
dieser Kämpfe bestehen." Hermann Kant in jW 1.10.1989

More information about the freebsd-questions mailing list