[Pkg-alsa-devel] Bug#913045: libasound2: ALSA lib pcm_dmix.c:1099:(snd_pcm_dmix_open) unable to open slave

[Pedro Silva]

On Thu, 8 Nov 2018 19:59:56 +0100 Elimar Riesebieter <riesebie at lxtec.de>
wrote:
> >
> > With the $HOME/.asoundrc, pointed to card 2, the sound is back and fully
> > working, thank you.
> >
> > You mean that a minor revision to this package caused it to now require
> > a manual configuration file?  Why?
>
> Hmm, the priority of the sequence of sond devices is done by the
> kernel (udev|systemd). If you are interested please run a test as
> follows:
>
> Unplug your usb device and reboot. After reboot plug in your usb
> device and run 'cat /proc/asound/cards'.
>
>
> Boot with a plugged in usb device and run 'cat /proc/asound/cards'.
>
> Is there any difference?
>
> Elimar
> --
> You cannot propel yourself forward by
> patting yourself on the back.


No difference.

As the original bug reporter, please understand that my knowledge of
Alsa is also limited.

Unplug, reboot, plug, $ cat /proc/asound/cards >
libasound2bug_reboot_thenplug.txt.
Reboot.

$ cat /proc/asound/cards
 0 [HDMI           ]: HDA-Intel - HDA ATI HDMI
                      HDA ATI HDMI at 0xfe960000 irq 67
 1 [Generic        ]: HDA-Intel - HD-Audio Generic
                      HD-Audio Generic at 0xfe800000 irq 69
 2 [USB            ]: USB-Audio - Razer Kraken USB
                      Razer Razer Kraken USB at usb-0000:09:00.3-4.3,
full speed

$ diff /proc/asound/cards libasound2bug_reboot_thenplug.txt
[no output]

My concern is the "it worked before". Anything else besides Alsa and the
kernel that could cause this issue?

Best regards,
Pedro Silva