Re2: Wrong creation of emulated volume control.

[Petr Gladkikh <batyi@mail.ru>]

Hello.

Clemens Ladisch wrote:
>>> I have sound card with PCM having only mute switch (no volume
>>> control). I have installed alsa-lib-1.8.0 (release). My control list
>>> now have following PCM control (following is part of amixer output):
>>>
>>>  >>>
>>> Simple mixer control 'PCM',0
>>>    Capabilities: pvolume pswitch pswitch-joined
>>>    Playback channels: Front Left - Front Right - Front Center - Rear
>>> Left - Rear Right - Woofer - ? - ? - ? - ? - ? - ? - ? - ? - ? - ? - ?
>>> - ? - ? - ? - ? - ? - ? - ? - ? - ? - ? - ? - ? - ? - ? - ?
>>>    Limits: Playback 0 - 0
>>>    Front Left: Playback 0 [0%] [on]
>>>    Front Right: Playback 0 [0%] [on]
>>>    Front Center: Playback 0 [0%] [on]
>>>    Rear Left: Playback 0 [0%] [on]
>>>    Rear Right: Playback 0 [0%] [on]
>>>    Woofer: Playback 0 [0%] [on]
>>>    ?: Playback 0 [0%] [on]
>>>    ?: Playback 0 [0%] [on]
>>>    ?: Playback 0 [0%] [on]
>>>    ...
> 
> 
> How do these controls look in /etc/asound.state after running "alsactl
> store"?

It's my fault but the subject is not correct, I did not mentioned that 
I had not configured any plugins yet (including svol). But the problem 
exists anyway.

My environment (if it helps)
Linux 2.6.9 (Gentoo)
alsa-lib 1.0.8, alsa-utils 1.0.8 (release)
Hardware: AC97 in ICH5 chipset, 6-channel C-Media 9739A (everything is 
on-board)
Driver: intel-8x0

	Reproduction:

=[1]= Boot, everything is OK. Both 'alsactl store' and amixer produce 
sensible results (alsamixer screen looks messy anyway). The part of 
'alsactl store' result in /etc/asound.state related to PCM is as 
follows (no other PCM controls present):

state.ICH5 {

	. . . . .

	control.26 {
		comment.access 'read write'
		comment.type BOOLEAN
		comment.count 1
		iface MIXER
		name 'PCM Playback Switch'
		value false
	}

	. . . . .
}

=[2]= aplay
^C

And now magig happens :) amixer produce the output which has been in 
my previous post, and 'alsactl store' fails with error message:

alsactl: control.c:2234: snd_ctl_elem_value_get_integer: Assertion 
`idx < sizeof(obj->value.integer.value) / 
sizeof(obj->value.integer.value[0])' failed.
Aborted.

--
Petr


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