Dne st 18. dubna 2007 Takashi Iwai napsal(a):
At Tue, 17 Apr 2007 19:42:42 +0200,
Pavel Patz wrote:
Hi all,
I have problems with chip Realtek ALC883 (lspci: 00:06.1 Audio device: nVidia Corporation MCP55 High Definition Audio (rev a2)) and surround sound.
Stereo sound is working (games, music) fine - all 6 speaker are playing.
But when I tried to run "aplay chan-id.wav", i've heard only "front left" (front & rear left + center were playing) and "front right" (right front & rear were playing), then was silence until the end of the file.
Running "aplay -Dsurround51 chan-id.wav" causes that aplay hangs-up without any output. Running it with -v parameter produces this output:
Playing WAVE 'Desktop/Surround-SDL-testfiles/chan-id.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Channels 6 Soft volume PCM Control: PCM Playback Volume min_dB: -51 resolution: 256 Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 6 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 5460 period_size : 1365 period_time : 30952 tick_time : 1000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 1365 xfer_align : 1365 start_threshold : 5460 stop_threshold : 5460 silence_threshold: 0 silence_size : 0 boundary : 6147413491360727040 Slave: Hardware PCM card 0 'HDA NVidia' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 6 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 5460 period_size : 1365 period_time : 30952 tick_time : 1000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 1365 xfer_align : 1365 start_threshold : 5460 stop_threshold : 5460 silence_threshold: 0 silence_size : 0 boundary : 6147413491360727040
and then hang up until i press ctrl+c. Same results i get with speaker-test.
Looks like the stream setup doesn't match with your device.
I'm using alsa-lib-1.0.14-0.4.rc3.fc7
The more important thing is the version of ALSA driver you're using. Try the latest ALSA version (not released one), HG version, at first. If you don't want / have HG, try the daily snapshot tarball below: ftp://ftp.suse.com/pub/projects/alsa/snapshot/
Then check whether it's a supported device or not. If yours is an unsupported one, you'll see a kernel messages like "unknown model, using BIOS..." Anyway, you can try different model option value for snd-hda-intel module, as listed in Documentation/ALSA-Configuration.txt.
Takashi
Hi,
thanks a lot, it is working now!!!
1) upgrade to last (today's) snaphot helped - there were no hang-ups when using -Dsurround51
2) Auto-detection is not working (i got "hda_codec: Unknown model for ALC883, trying auto-probe from BIOS...") - just must use model=6stack-dig
[cdome@andromeda ~]$ /sbin/lspci | grep Audio 00:06.1 Audio device: nVidia Corporation MCP55 High Definition Audio (rev a2)
3) When starting alsa i usualy get one of these messages:
[root@andromeda Audition]# /etc/init.d/alsasound start Starting sound driver: snd-hda-intel done /usr/sbin/alsactl: load_state:1326: No soundcards found...
or
[root@andromeda Audition]# /etc/init.d/alsasound start Starting sound driver: snd-hda-intel done XXX write TLV...
however sound is working properly. From my view is hard to say under which conditions i get which one - just sometimes first one and sometimes second one.
4) It seems there are Center+LFE and Rear Left+Right jacks swapped - i had to connect Center to Rear output and vice versa. But controls in alsamixer are not swapped so i have to use Surround slider to adjust Center and LFE speakers; LFE slider to adjust Rear right speaker and finally Center slider to adjust Rear left speaker.
5) As my soundcard is 7.1, current driver is incapable to use it: [cdome@andromeda Surround-SDL-testfiles]$ speaker-test -Dsurround71 -c8
speaker-test 1.0.14rc1
Playback device is surround71 Stream parameters are 48000Hz, S16_LE, 8 channels Using 16 octaves of pink noise Channels count (8) not available for playbacks: Invalid argument Setting of hwparams failed: Invalid argument
(uhm, i get that "Invalid argument" message in czech language as "Nepristupny argument", i hope that is proper translation)
But as I said, it is working now (even with those minor problems)! I hope my message will help you make alsa better.
Thanks again for your great work.
Pavel