[alsa-devel] BugReport: Dice works partially [Broken]

[Takashi Sakamoto]

Hi,

To reveal what causes this issue, please post following test and the 
outputs. The test consists of 8 steps.

0. Plug-out your DesktopKonnect6.

1. To prevent snd_dice from auto-loading, add an entry to configuration 
file. See:
https://wiki.archlinux.org/index.php/Kernel_modules#Blacklisting

Perhaps:
$ cat /etc/modprobe.d/blacklist.conf
...
blacklist snd_dice
...

2. Reboot your system and confirm that snd_dice is not auto-loaded.

$ lsmod | grep snd_dice
(nothing)

3. Plug-in your DesktopKonnect6.

4. Wait one minute without do things
(I expect several bus reset occurs in IEEE 1394 bus then the bus becomes 
calm.)

5. Load snd_dice and check it
$ modprobe snd_dice
$ lsmod | grep snd_dice
snd_dice (you may see.)

6. Dump module information
$ cat /proc/asound/DesktopKonnekt6/dice
...(outputs)...

7. Try your playback test.

8. get logs from pulseaudio via journalctl or the other tools.


Regards

Takashi Sakamoto

On May 11 2015 07:10, Stanislav Sergiienko wrote:
>> Any error messages in the system log?
>
> The problem is that i couldn't find any significant errors. All i was
> able to gather is:
>
> journalctl:
> апр 13 13:47:56 ArchLinux pulseaudio[2115]: [pulseaudio] pid.c: Daemon
> already running.
> апр 13 13:48:03 ArchLinux pulseaudio[2098]: [alsa-sink-DICE]
> alsa-sink.c: ALSA woke us up to write new data to the device, but
> there was actually nothing to write!
> апр 13 13:48:03 ArchLinux pulseaudio[2098]: [alsa-sink-DICE]
> alsa-sink.c: Most likely this is a bug in the ALSA driver 'snd_dice'.
> Please report this issue to the ALSA developers.
> апр 13 13:48:03 ArchLinux pulseaudio[2098]: [alsa-sink-DICE]
> alsa-sink.c: We were woken up with POLLOUT set -- however a subsequent
> snd_pcm_avail() returned 0 or another value < min_avail.
>
> Sometimes see this:
> май 03 17:30:27 ArchLinux pulseaudio[657]: [alsa-sink-DICE]
> alsa-sink.c: Resume failed, couldn't restore original sample settings.
>
> Sometimes after play failed i see in sysnotification area:
> "DesktopKonnect6 don't work, 'Default' will be used"
>
> In dmesg i see no errors.
>
>> What exactly happens when it cannot play sound?
>
> No errors. It's just don't play anything. For example, for video,
> various players handle it differently - some are just play video
> without any sound, some can't play video at all(stops play on first
> frame).
>
>> What exactly happens when it "breaks"?
>
> Almost nothing, sometimes i can hear that music breaks with some kind
> of "click-sound", like someone pulled the wire from my loudspeakers.
> But this sound is barely noticeable.
> If i try to play file again i hear some kind of "initialization
> sound", like when device open on PC boot.
> It's hard to describe it in my English :)
>
> If you send me info about how to gather more detailed logs, i try do this.
> P.S. Sorry for long time to answer.