It sounds like that drivers when first started are run via modprobe, etc, but not placed in /etc/modules so as to reload when booting.
On Thu, Jan 8, 2015 at 3:48 AM, <[email protected]> wrote: > I have a rather odd problem, and was wondering if you guys could shed some > light on it. After first installing alsa-base and alsa-utils, alsa > recognises the default sound card, but after rebooting it will not. I have > no idea how to circumvent this, and it seems to be the cause of my USB > sound card not producing any sound either. > > This is the procedure I followed for the setup: > > Flash with BBB-eMMC-flasher-ubuntu-14.04.1-console-armhf-2014-10-29-2gb.img > ubuntu@arm: ~$ sudo su > root@arm: /home/ubuntu# apt-get update && apt-get upgrade -y && apt-get > install lxde libasound2 alsa-base alsa-utils alsa-oss ekiga -y && reboot > > ubuntu@arm: ~$ uname -a > Linux arm 3.14.22-ti-r31 #1 SMP PREEMPT Sat Oct 25 01:30:27 UTC 2014 armv7l > armv7l armv7l GNU/Linux > > The part below seems to be a loop, I did this with the same result 3 times > now: > > ubuntu@arm: ~$ aplay -l > aplay: device_list:268: no soundcards found... > ubuntu@arm: ~$ ls /proc/asound > cards devices modules oss pcm timers version > ubuntu@arm: ~$ sudo apt-get purge alsa-base alsa-utils -y > ubuntu@arm: ~$ sudo reboot > > > ubuntu@arm:~$ ls /proc/asound > Black card0 cards devices modules oss pcm timers version > ubuntu@arm: ~$ sudo apt-get install alsa-base alsa-utils -y > ubuntu@arm: ~$ aplay -l > **** List of PLAYBACK Hardware Devices **** > card 0: Black [TI BeagleBone Black], device 0: HDMI hdmi-hifi-0 [] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > ubuntu@arm: ~$ ls /proc/asound > Black card0 cards devices modules oss pcm timers version > ubuntu@arm: ~$ sudo reboot > > (end of loop) > > At this point I am not sure what to do. Sound playback only seems to work > without rebooting, and the device will be moved between my home and work > for prototyping several times. > > Does this sound familiar to anyone? I have been trying to figure out > what's causing this all day yesterday, and came up empty. > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
