[mythtv-users] Moved to Intel NUC - no sound & IR receiver needed

Simon Hobson linux at thehobsons.co.uk
Sun Jan 26 13:25:58 UTC 2020


After my old frontend hardware (Fujitsu Scaleo e running Myth 0.24.1 and kernel 2.6.38) died, I've bought and oldish NUC on the basis that it stood a chance of running the old version of MythBuntu and they are reasonably cheap (basically I picked the cheapest off eBay for testing) so I can afford to buy several for the different rooms.

Just copied the whole system from the HD I kept from the old hardware, sorted out Grub, found the config setting to have the frontend try several times to reach the backend (ethernet takes a few seconds to get ready and it boots **really** fast off SSD) - but I have no sound.

Anyone got suggestions how to debug this ? Myth is the only thing I use Linux for that uses sound, everything else has been (headless) server stuff. I've copied everything that comes to mind below ...

There's a couple of other issues, but I'll concentrate on getting the sound working first - without that, no point fixing anything else !

Could do with advice on a compact (ie form factor like the FLIRC) but basic USB IR receiver to go with the MCE remotes I've been using (they came with the Scaleo PCs which had integrated IR receivers) ?

Simon


mythfrontend.log contains :
ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave
2020-01-26 12:39:00.826 ALSA, Error: snd_pcm_open("default"): No such file or directory
2020-01-26 12:39:00.826 Audio device ALSA:default isn't usable Check audio configuration
...
2020-01-26 12:39:41.684 TV: Attempting to change from None to WatchingPreRecorded
ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave
2020-01-26 12:39:42.076 ALSA, Error: snd_pcm_open("default"): No such file or directory
...
ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave
2020-01-26 12:39:42.374 ALSA, Error: snd_pcm_open("default"): No such file or directory
2020-01-26 12:39:42.374 AO: Opening audio device 'default' ch 2(2) sr 48000 sf signed 16 bit reenc 0
ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave
2020-01-26 12:39:42.374 ALSA, Error: snd_pcm_open("default"): No such file or directory
2020-01-26 12:39:42.374 AudioOutput Error: Aborting reconfigure
2020-01-26 12:39:42.374 AudioPlayer: Disabling Audio, reason is: Aborting reconfigure


lspci shows :
00:1b.0 Audio device: Intel Corporation Device 1e20 (rev 04)

dmesg shows :
[    8.767678] HDA Intel 0000:00:1b.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
[    8.767770] HDA Intel 0000:00:1b.0: irq 42 for MSI/MSI-X
[    8.767815] HDA Intel 0000:00:1b.0: setting latency timer to 64

aplay -l shows no devices

ls -Rl /dev/snd/ shows :
/dev/snd/:
total 0
drwxr-xr-x  2 root root       60 2020-01-26 12:38 by-path
crw-rw----+ 1 root audio 116,  3 2020-01-26 12:38 controlC0
crw-rw----+ 1 root audio 116,  2 2020-01-26 12:38 hwC0D3
crw-rw----+ 1 root audio 116,  1 2020-01-26 12:38 seq
crw-rw----+ 1 root audio 116, 33 2020-01-26 12:38 timer

/dev/snd/by-path:
total 0
lrwxrwxrwx 1 root root 12 2020-01-26 12:38 pci-0000:00:1b.0 -> ../controlC0





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