Hello guys,
Not very experienced with Linux sound, sorry if my question doesn't belong to
this list.
Acer Revo 3610 desktop
Ubuntu 10.10
alsamixer v1.0.23
HDA Intel card with Realtek ALC662 rev1 chip
HDA NVidia card with NVidia GPU0b HDMI/Dp chip
The desktop is connected to my Samsung UA46B8000 tv via the HDMI port. I'm
running XBMC 2.10.1 to play media from the USB 2.0 attached HDD via the Acer
HDMI on the Samsung tv.
Everything's working fine with the only exception that the sound on the mp3s,
avis, internet radios, etc. has a strange high pitched background static-kind
of
noise. It only happens when there's sound coming out from the speakers, not a
constant one.
Sorry, I can not describe it better, but I can take a sample and upload it
somewhere to better clarify it.
If I watch any of the TV channels, play DVD, it never happens, only via the
Acer. I found the following in the user.log file, but not sure if that 'static
noisy' is caused by the delay, but I'm using the NVidia and not the Intel sound
card for sound output.
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: snd_pcm_avail_delay()
returned strange values: delay 0 is less than avail 64.
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: Most likely this is a bug
in
the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA
developers.
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: snd_pcm_dump():
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: Soft volume PCM
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: Control: PCM Playback Volume
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: min_dB: -51
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: max_dB: 0
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: resolution: 256
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: Its setup is:
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: stream : CAPTURE
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: access :
MMAP_INTERLEAVED
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: format : S16_LE
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: subformat : STD
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: channels : 2
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: rate : 44100
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: exact rate : 44100
(44100/1)
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: msbits : 16
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: buffer_size : 88192
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: period_size : 44096
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: period_time : 999909
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: tstamp_mode : ENABLE
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: period_step : 1
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: avail_min : 87310
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: period_event : 0
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: start_threshold : -1
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: stop_threshold :
1444937728
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: silence_threshold: 0
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: silence_size : 0
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: boundary : 1444937728
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: Slave: Hardware PCM card 0
'HDA Intel' device 0 subdevice 0
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: Its setup is:
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: stream : CAPTURE
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: access :
MMAP_INTERLEAVED
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: format : S16_LE
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: subformat : STD
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: channels : 2
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: rate : 44100
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: exact rate : 44100
(44100/1)
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: msbits : 16
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: buffer_size : 88192
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: period_size : 44096
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: period_time : 999909
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: tstamp_mode : ENABLE
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: period_step : 1
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: avail_min : 87310
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: period_event : 0
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: start_threshold : -1
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: stop_threshold :
1444937728
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: silence_threshold: 0
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: silence_size : 0
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: boundary : 1444937728
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: appl_ptr : 87360
Apr 26 17:31:28 revo pulseaudio[1637]: alsa-util.c: hw_ptr : 87360
$ cat /etc/asound.conf
pcm.!default {
type plug
slave.pcm {
type hw
card 1
device 7
}
}
$ cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xfeafc000 irq 44
1 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xfcf7c000 irq 17
$ cat /proc/asound/devices
2: : timer
3: : sequencer
4: [ 0- 1]: digital audio playback
5: [ 0- 0]: digital audio playback
6: [ 0- 0]: digital audio capture
7: [ 0- 0]: hardware dependent
8: [ 0] : control
9: [ 1- 9]: digital audio playback
10: [ 1- 8]: digital audio playback
11: [ 1- 7]: digital audio playback
12: [ 1- 3]: digital audio playback
13: [ 1- 3]: hardware dependent
14: [ 1- 2]: hardware dependent
15: [ 1- 1]: hardware dependent
16: [ 1- 0]: hardware dependent
17: [ 1] : control
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: ALC662 rev1 Digital [ALC662 rev1 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
Thank you for everyone's help.
Steve
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