Date: Mon, 05 Jul 2010 08:11:40 +0200
Message-ID: <s5hy6dqbgpv.wl%tiwai@suse.de>
From: Takashi Iwai <tiwai@suse.de>
To: =?UTF-8?B?U2jDqXJhYg==?= <Sebastien.Hinderer@ens-lyon.org>
Cc: Matthew Ranostay <mranostay@embeddedalley.com>,
       PeiSen Hou <pshou@realtek.com.tw>, matt.jared@intel.com,
       andy.kopp@intel.com, dan.d.kogan@intel.com,
       Jaroslav Kysela <perex@perex.cz>, Wu Fengguang <fengguang.wu@intel.com>,
       Daniel T Chen <crimsun@ubuntu.com>,
       Lydia Wang <lydiawang@viatech.com.cn>, alsa-devel@alsa-project.org,
       linux-kernel@vger.kernel.org
Subject: Re: PC Beeps not working with HDA Intel module
In-Reply-To: <20100626112504.GA3365@pema>
References: <20100626112504.GA3365@pema>
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At Sat, 26 Jun 2010 13:25:04 +0200,
Shérab wrote:
> 
> Dear all,
> 
> The problem is on a computer with an HDA Intel sound card, Intel G45
> DEVCTG chip and appears will all version s of the kernel.
> 
> Running e.g.
> beep 440
> produces a beep whose audible frequency is very low, definitely not 440
> Hz.
> 
> However, it is worth notiing that grub is able to produce a beep of the
> right frequency at boot time.
> 
> Can this problem be fixed ?

There are a few ways.

If you build your kernel with SND_HDA_INPUT_BEEP_MODE=2, or set the
option of snd-hda-intel module beep_mode=2, you'll be able to switch
to the native beep from HD-audio codec digital beep via muting "Beep"
mixer switch.

Or, if the value above is 0, it'll be always the system-native beep.
This can be done also via writing sysfs codec hint, as documented in
HD-Audio.txt.

Alternatively, you can reload pcspkr module so that it grabs the beep
output again over snd-hda-intel, "modprobe -r pcspkr; modprobe pcspkr"


Takashi
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