I'm have some problems with audio inside the guest system (Tiny Core x86 6.4.1). I test the sound with aplay and it play well and nice when I am using virtualbox “ICH AC97” audio controller. But when I change the virtualbox controller to “Intel HD Audio” I got the error:
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
aplay: main:722: audio open error: No such file or directory
The funny thing is I kind remember it worked well in the past with both audio controllers (only with virtualbox SoundBlaster 16 it never worked). So, to make sure the problem was not in my installation I make the same test using a TinyCore liveCD as downloaded in the site (with Xvesa and no audio). I booted it and installed ONLY alsa-config.tcz (and consequently its dependencies pci-utils.tcz, alsa.tcz, etc). I did the test with “Intel HD Audio” and got exact same error. And the same test from the liveCD using “ICH AC97” works very well.
That's kind driving me crazy here because I almost sure I remember it working in both audio controllers. But it could be a false memory.
Looking in the internet I only find similar problems with people with more then one audio cards and they solve that using a file .asoundrc in the home directory or with the line “option snd_hda_intel index=1” in a modprobe config file. I tried both and in my case with only one card those don't solve the problem.
What I have missed? Does anyone know how to fix it? I can do sound with “ICH AC97” but I need make it working with “Intel HD Audio” too.
Follow some information of the system (Intel HD Audio version):
Virtualbox version 4.3.18;
Host: Windows 7;
Guest: Tiny Core x86 6.4.1 original liveCD.
Only thing I installed after the boot is a download+load (using Apps) in the alsa-config.tcz witch bring all dependencies (I also did it in parts. first download and them tce-load to check for errors and everything looks OK).
00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
00:01.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
00:02.0 VGA compatible controller: InnoTek Systemberatung GmbH VirtualBox Graphics Adapter
00:03.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 02)
00:04.0 System peripheral: InnoTek Systemberatung GmbH VirtualBox Guest Service
00:05.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller (rev 01)
00:06.0 USB controller: Apple Inc. KeyLargo/Intrepid USB
00:07.0 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 08)
00:0b.0 USB controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller
00:0d.0 SATA controller: Intel Corporation 82801HM/HEM (ICH8M/ICH8M-E) SATA Controller [AHCI mode] (rev 02)
Module Size Used by Not tainted
snd_hda_codec_idt 45056 1
snd_hda_codec_generic 36864 1 snd_hda_codec_idt
snd_hda_intel 20480 0
snd_hda_controller 20480 1 snd_hda_intel
snd_hda_codec 57344 4 snd_hda_codec_idt,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep 12288 1 snd_hda_codec
snd_pcm 49152 3 snd_hda_intel,snd_hda_controller,snd_hda_codec
snd_timer 20480 1 snd_pcm
snd 40960 7 snd_hda_codec_idt,snd_hda_codec_generic,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore 12288 2 snd_hda_codec,snd
joydev 16384 0
cpufreq_conservative 12288 0
cpufreq_stats 12288 0
cpufreq_userspace 12288 0
cpufreq_powersave 12288 0
ppdev 12288 0
parport_pc 24576 0
parport 24576 2 ppdev,parport_pc
battery 16384 0
squashfs 24576 8
loop 20480 16
ac 12288 0
microcode 12288 0
e1000 77824 0
pcspkr 12288 0
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 1: STAC9221 A1 Digital [STAC9221 A1 Digital]
Subdevice #0: subdevice #0
Thank you for any help!