[pulseaudio-discuss] alsa module fails after rebooting (solved)

[Pete Nesbitt]

On Fri, 26 Dec 2008 14:15:27 -0800
Pete Nesbitt <pete at linux1.ca> wrote:

> Hi,
> I have a system serving music locally and over the network. It was
> working properly (once I took it off wireless), however after shutting
> it down (to move it) the ALSA modules are failing to load.
> 
> Maybe this is not a PA issue, it may be an ALSA problem but thought I 
> would post anyway.
> 
> I am auto loading the alsa modules.
> 
> Here is the log information for when it was working, followed by the
> same info when it failed. I don't know why it would quit working after 
> a reboot.
> 
> When it was working:
> 
> Dec 26 11:11:43 artigo pulseaudio[11657]: module-hal-detect.c: Trying capability alsa
> Dec 26 11:11:43 artigo pulseaudio[11657]: module-alsa-sink.c: Successfully opened device front:0.
> Dec 26 11:11:43 artigo pulseaudio[11657]: module-alsa-sink.c: Successfully enabled mmap() mode.
> Dec 26 11:11:43 artigo pulseaudio[11657]: alsa-util.c: Unable to attach to mixer front:0: No such file or directory
> Dec 26 11:11:43 artigo pulseaudio[11657]: alsa-util.c: Successfully attached to mixer 'hw:0'
> Dec 26 11:11:43 artigo pulseaudio[11657]: alsa-util.c: Cannot find mixer control "Master".
> Dec 26 11:11:43 artigo pulseaudio[11657]: alsa-util.c: Using mixer control "PCM".
> Dec 26 11:11:43 artigo pulseaudio[11657]: sink.c: Created sink 0 "alsa_output.pci_1106_3288_sound_card_0_alsa_playback_0" with sample spec "s16le 2ch 48000Hz"
> Dec 26 11:11:43 artigo pulseaudio[11657]: source.c: Created source 0 "alsa_output.pci_1106_3288_sound_card_0_alsa_playback_0.monitor" with sample spec "s16le 2ch 48000Hz"
> Dec 26 11:11:43 artigo pulseaudio[11657]: module-alsa-sink.c: Using 4 fragments of size 4736 bytes.
> Dec 26 11:11:43 artigo pulseaudio[11657]: alsa-util.c: All 2 channels can be mapped to mixer channels. Using hardware volume control.
> Dec 26 11:11:43 artigo pulseaudio[11657]: module-alsa-sink.c: Starting playback.
> Dec 26 11:11:43 artigo pulseaudio[11657]: module.c: Loaded "module-alsa-sink" (index: #0; argument: "device_id=0 sink_name=alsa_output.pci_1106_3288_sound_card_0_alsa_playback_0").
> Dec 26 11:11:43 artigo pulseaudio[11657]: module-alsa-source.c: Successfully opened device front:0.
> Dec 26 11:11:43 artigo pulseaudio[11657]: module-alsa-source.c: Successfully enabled mmap() mode.
> Dec 26 11:11:43 artigo pulseaudio[11657]: alsa-util.c: Unable to attach to mixer front:0: No such file or directory
> Dec 26 11:11:43 artigo pulseaudio[11657]: alsa-util.c: Successfully attached to mixer 'hw:0'
> Dec 26 11:11:43 artigo pulseaudio[11657]: alsa-util.c: Using mixer control "Capture".
> Dec 26 11:11:43 artigo pulseaudio[11657]: source.c: Created source 1 "alsa_input.pci_1106_3288_sound_card_0_alsa_capture_0" with sample spec "s16le 2ch 48000Hz"
> Dec 26 11:11:43 artigo pulseaudio[11657]: module-alsa-source.c: Using 4 fragments of size 4736 bytes.
> Dec 26 11:11:43 artigo pulseaudio[11657]: alsa-util.c: All 2 channels can be mapped to mixer channels. Using hardware volume control.
> Dec 26 11:11:43 artigo pulseaudio[11657]: module.c: Loaded "module-alsa-source" (index: #1; argument: "device_id=0 source_name=alsa_input.pci_1106_3288_sound_card_0_alsa_capture_0").
> Dec 26 11:11:43 artigo pulseaudio[11657]: module-hal-detect.c: Loaded 2 modules.
> 
> ______
> 
> Rebooted at: 11:59
> ______
> Now ALSA fails, as does the daemon:
> 
> Dec 26 12:07:05 artigo-nic pulseaudio[2705]: alsa-util.c: Error opening PCM device hw:0: No such file or directory
> Dec 26 12:07:05 artigo-nic pulseaudio[2705]: module.c: Failed to load  module "module-alsa-sink" (argument: "device_id=0 sink_name=alsa_output.pci_1106_3288_sound_card_0_alsa_playback_0"): initialization failed.
> Dec 26 12:07:05 artigo-nic pulseaudio[2705]: alsa-util.c: Error opening PCM device hw:0: No such file or directory
> Dec 26 12:07:05 artigo-nic pulseaudio[2705]: module.c: Failed to load  module "module-alsa-source" (argument: "device_id=0 source_name=alsa_input.pci_1106_3288_sound_card_0_alsa_capture_0"): initialization failed.
> Dec 26 12:07:05 artigo-nic pulseaudio[2705]: module-rtp-send.c: Source does not exist.
> Dec 26 12:07:05 artigo-nic pulseaudio[2705]: module.c: Failed to load  module "module-rtp-send" (argument: "source=alsa_output.pci_1106_3288_sound_card_0_alsa_playback_0.monitor"): initialization failed.
> Dec 26 12:07:05 artigo-nic pulseaudio[2705]: main.c: Module load failed.
> Dec 26 12:07:05 artigo-nic pulseaudio[2705]: main.c: Failed to initialize daemon.
> 
> _______
> I modified my default.pa so not use the alsa sink as rtp source, so now 
> as expected ALSA fails, but still sends music to remote hosts:
> 
> Dec 26 12:56:07 artigo-nic pulseaudio[2834]: alsa-util.c: Error opening PCM device hw:0: No such file or directory
> Dec 26 12:56:07 artigo-nic pulseaudio[2834]: module.c: Failed to load  module "module-alsa-sink" (argument: "device_id=0 sink_name=alsa_output.pci_1106_3288_sound_card_0_alsa_playback_0"): initialization failed.
> Dec 26 12:56:07 artigo-nic pulseaudio[2834]: alsa-util.c: Error opening PCM device hw:0: No such file or directory
> Dec 26 12:56:07 artigo-nic pulseaudio[2834]: module.c: Failed to load  module "module-alsa-source" (argument: "device_id=0 source_name=alsa_input.pci_1106_3288_sound_card_0_alsa_capture_0"): initialization failed.
> 
> I have powered it off, rebooted etc but no luck. Not sure if it is a 
> hardware issue of something on the software side.
> 
> Any ideas?
> Thanks.

The problem was that udev overwrites permissions to the sound device on 
reboot. I had given everyone rw (it's an appliance so I'm not worried 
about local user security).

I'm running Fedora 9, and had to modify /etc/udev/rules.d/40-alsa.rules
I changed this:
KERNEL=="controlC[0-9]*",	NAME="snd/%k"
KERNEL=="hwC[D0-9]*",		NAME="snd/%k"
KERNEL=="pcmC[D0-9cp]*",	NAME="snd/%k"
KERNEL=="midiC[D0-9]*",		NAME="snd/%k"
KERNEL=="timer",		NAME="snd/%k"
KERNEL=="seq",			NAME="snd/%k"

To this:
KERNEL=="controlC[0-9]*",	NAME="snd/%k", MODE="0666"
KERNEL=="hwC[D0-9]*",		NAME="snd/%k", MODE="0666"
KERNEL=="pcmC[D0-9cp]*",	NAME="snd/%k", MODE="0666"
KERNEL=="midiC[D0-9]*",		NAME="snd/%k", MODE="0666"
KERNEL=="timer",		NAME="snd/%k", MODE="0666"
KERNEL=="seq",			NAME="snd/%k", MODE="0666"

It now works great locally and over the LAN via RTP. Would still like to 
use wireless but that seems to be too much traffic  for the network.

FYI, wireless floods my logs with 20 lines per second!
Dec 21 13:05:13 artigo pulseaudio[2126]: module-rtp-send.c: Failed to push chunk into memblockq.

Oh well :(

-Pete
-- 
Pete Nesbitt

http://www.linux1.ca