Arch Linux

B_Lizzard

Member

From: Greece

Registered: 2006-07-16

Posts: 11

Issues with sound on ICH4/ALC655

Hi,

I've been having some issues setting up the sound output on my Fujitsu-Siemens Amilo L1300. Here's some information on the system itself:

lspci | grep audio

00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)

lsmod | grep snd

snd_seq_dummy           1099  0 
snd_seq_oss            25304  0 
snd_seq_midi_event      4452  1 snd_seq_oss
snd_seq                42628  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device          4313  3 snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss            33693  0 
snd_mixer_oss          14810  1 snd_pcm_oss
snd_intel8x0           21848  0 
snd_ac97_codec         85937  1 snd_intel8x0
ac97_bus                 750  1 snd_ac97_codec
snd_pcm                57479  3 snd_pcm_oss,snd_intel8x0,snd_ac97_codec
snd_timer              16117  2 snd_seq,snd_pcm
snd                    43847  9 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer
soundcore               5007  1 snd
snd_page_alloc          5809  2 snd_intel8x0,snd_pcm

cat /proc/asound/cards

 0 [I82801DBICH4   ]: ICH4 - Intel 82801DB-ICH4
                      Intel 82801DB-ICH4 with ALC655 at irq 5

cat /proc/asound/card0/codec97#0/ac97#0-0

0-0/0: Realtek ALC655 rev 0

PCI Subsys Vendor: 0x1734
PCI Subsys Device: 0x1079

Flags: 0
Revision         : 0x00
Compat. Class    : 0x00
Subsys. Vendor ID: 0xffff
Subsys. ID       : 0xffff

Capabilities     :
DAC resolution   : 16-bit
ADC resolution   : 16-bit
3D enhancement   : No 3D Stereo Enhancement

Current setup
Mic gain         : +0dB [+0dB]
POP path         : pre 3D
Sim. stereo      : off
3D enhancement   : off
Loudness         : off
Mono output      : MIX
Mic select       : Mic1
ADC/DAC loopback : off
Extended ID      : codec=0 rev=2 LDAC SDAC CDAC DSA=0 SPDIF
Extended status  : SPCV LDAC SDAC CDAC SPDIF=10/11 SPDIF
SPDIF Control    : Consumer PCM Category=0x2 Generation=1 Rate=48kHz

The problems I'm having are these:

No matter how I set up my sound system, I never get any output through my laptop's speakers. However, if I plug my headphones in the SPDIF port, I get a very faint sound signal. I've tried ALSA, OSS and Pulseaudio, with no success. The sound servers seem oblivious to the fact that they don't output any sounds, with pavucontrol from Pulseaudio showing everything as it should be.

This is most likely a problem with the kernel. I booted kernel26-lts, and the sound worked perfectly, as it also does in Ubuntu. I only recently installed Arch, so I have no older kernels in /var/cache to test. I've tried playing around with the modules, but I got nothing. AFAIK everything is loaded properly.

EDIT: I tested 2.6.31 from December the 25th, and I got no sound on there either.

Can anyone help with this in any way?

Thanks a lot.

Last edited by B_Lizzard (2010-01-09 10:59:33)

B_Lizzard

Member

From: Greece

Registered: 2006-07-16

Posts: 11

Re: Issues with sound on ICH4/ALC655

No sound on 2.6.30, but I discovered a (weird) workaround. When resuming from suspend, sound works correctly. I'll need to work out exactly why this happens, maybe the sound hardware enters a weird power state during boot-up which gets cleared with resume, but this is it for now.

Thanks.