[pulseaudio-discuss] (alsa-lib)pcm_hw.c: Invalid PCM state for chmap_get: OPEN

[Raymond Yau]

>>
>> Have you tested surround21?
>
> Yes, front speakers work fine, however LFE doesn't seem to work. Instead
when I try to test LFE (from sound UI) I have weird noise in one of rear
speakers. There are no such problems with any other mode though (I see that
officially only 5.1 mode is supported, however 4.1, 5.0 and 5.1 all work
fine), I decided to leave 2.1 mode for now, not sure whose fault is that.

http://git.alsa-project.org/?p=alsa-lib.git;a=commitdiff;h=3c4a22ea49a881cdbfe2d50eef94b17e38104734;hp=1ef1c5cdb4301898499c0391cdfac2117c7d4684#patch17

It is strange that pcm state is open

(   0.089|   0.001) D: [pulseaudio] alsa-mixer.c: Looking at profile
output:analog-surround-21
(   0.089|   0.000) D: [pulseaudio] alsa-mixer.c: Checking for playback on
Analog Surround 2.1 (analog-surround-21)
(   0.089|   0.000) D: [pulseaudio] alsa-util.c: Trying surround21:1 with
SND_PCM_NO_AUTO_FORMAT ...
(   0.089|   0.000) I: [pulseaudio] (alsa-lib)pcm_hw.c: Invalid PCM state
for chmap_get: OPEN

(   0.089|   0.000) D: [pulseaudio] alsa-util.c: Managed to open
surround21:1
(   0.089|   0.000) I: [pulseaudio] alsa-util.c: Disabling tsched mode
since BATCH flag is set
(   0.089|   0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is
1213 ms
(   0.090|   0.000) D: [pulseaudio] alsa-util.c: Set buffer size first (to
4797 samples), period size second (to 1199 samples).
(   0.090|   0.000) I: [pulseaudio] alsa-util.c: Device surround21:1
doesn't support 44100 Hz, changed to 48000 Hz.
(   0.090|   0.000) D: [pulseaudio] alsa-mixer.c: Profile
output:analog-surround-21 supported.
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