Dear people!
Without success I tried to set up my soundchip. I noted:
1. The alsa-driver via82xx is sharing IRQ 3 with ehci_hcd (related to
the usb-system ??).
2. How could I prevent the usb-drivers from being loaded at boot?
3. How could I asign interrupts differently?
4. Is it at all possible that the soundchip's silence is related to the
sharing of an interrupt? (The network device eth0 is sharing interrupt
11 with two other modules (also usb I suppose) and all of them are
working well...)
5. Could it be that the device file /dev/dsp0 does not communicate with
the soundchip, but with something unknown to me? (alsaconf does not
return any errors, despite of nothing to be heard)
Below some details (uname, lsmod, lspci etc. )
Thanks a lot for some helpful advice!
By the way: sound is working under Windows, so there's no broken hardware.
--- SOME DETAILS ---
*** Motherboard ***
ASRock K7VT4A Pro
Chipsets: North Bridge: VIA KT400A ; South Bridge: VIA VT8237
*** OS: SuSE Linux 9.2; Kernel: ***
>uname -a
Linux sumpfmolch 2.6.8-24.24-default #1 Fri Jul 21 04:06:26 UTC 2006
i686 athlon i386 GNU/Linux
*** alsa-version ***
>rpm -q alsa
alsa-1.0.6-8
--- WHAT I DID ---
*** First: try a setup with alsaconf ***
- alsaconf found the module "via82xx" and the corresponding
VIA-Soundchip VT8233/A/8235/8237 AC97
- a short crackle is to be heard when alsa is setting up the module
- /usr/share/sounds/alsa/test.wav is silently but successfully played
- nontheless alsaconf wishes me to 'Have a lot of fun'
*** Second: checking messages ***
>tail /var/log/messages
Nov 14 18:49:43 sumpfmolch kernel: via82xx: Assuming DXS channels with
48k fixed sample rate.
Nov 14 18:49:43 sumpfmolch kernel: Please try dxs_support=1 or
dxs_support=4 option
Nov 14 18:49:43 sumpfmolch kernel: and report if it works on
your machine.
Nov 14 18:49:43 sumpfmolch kernel: ACPI: PCI interrupt 0000:00:11.5[C]
-> GSI 3 (level, low) -> IRQ 3
Nov 14 18:49:43 sumpfmolch kernel: PCI: Setting latency timer of device
0000:00:11.5 to 64
*** Third: in yast set dxs_support=4 and dxs_support=1 as recommended by the
above statement and again checking messages ***
>tail /var/log/messages
Nov 14 18:54:02 sumpfmolch kernel: ACPI: PCI interrupt 0000:00:11.5[C]
-> GSI 3 (level, low) -> IRQ 3
Nov 14 18:54:02 sumpfmolch kernel: PCI: Setting latency timer of device
0000:00:11.5 to 64
Nov 14 18:54:11 sumpfmolch kernel: ACPI: PCI interrupt 0000:00:11.5[C]
-> GSI 3 (level, low) -> IRQ 3
Nov 14 18:54:11 sumpfmolch kernel: PCI: Setting latency timer of device
0000:00:11.5 to 64
*** Fourth: Trying the following yields silence ***
>cat /usr/share/sounds/alsa/test.wav > /dev/dsp'
*** Rebooting does not solve the silence ***
less /var/log/boot.msg | grep sound
<notice>start services (sshd fbset alsasound)
Starting sound driver: via82xxdone
Restoring the previous sound settingdone
<notice>exit status of (sshd fbset alsasound) is (0 0 0)
--- MORE DETAILS ---
>cat /etc/modprobe.d/sound
options snd-via82xx dxs_support=4 enable=1 index=0
# uniq.virtual:VIA 823x rev60
alias snd-card-0 snd-via82xx
>dd bs=8 count=4 < /dev/dsp
>tail /var/log/messages:
Nov 14 19:37:10 sumpfmolch kernel: ALSA sound/core/pcm_lib.c:2487:
capture read error (DMA or IRQ trouble?)
>lsmod
Module Size Used by
snd_seq 53008 0
nls_iso8859_1 4224 0
nls_cp437 5888 0
vfat 13056 0
fat 43168 1 vfat
usbserial 26856 0
nvram 8328 0
parport_pc 37824 1
lp 10536 0
parport 37960 2 parport_pc,lp
thermal 17928 0
processor 25640 1 thermal
fan 5380 0
button 8464 0
battery 11396 0
ac 6404 0
snd_pcm_oss 57896 0
snd_mixer_oss 19200 1 snd_pcm_oss
ipv6 237440 36
snd_via82xx 26276 0
snd_ac97_codec 69728 1 snd_via82xx
snd_pcm 96776 3 snd_pcm_oss,snd_via82xx,snd_ac97_codec
snd_timer 24708 2 snd_seq,snd_pcm
snd_page_alloc 10248 2 snd_via82xx,snd_pcm
gameport 4608 1 snd_via82xx
snd_mpu401_uart 7552 1 snd_via82xx
snd_rawmidi 24356 1 snd_mpu401_uart
snd_seq_device 8716 2 snd_seq,snd_rawmidi
snd 60164 10
snd_seq,snd_pcm_oss,snd_mixer_oss,snd_via82xx,snd_ac97_codec,snd_pcm, \
snd_timer,snd_mpu401_uart,snd_rawmidi,snd_seq_device
soundcore 9056 1 snd
af_packet 20872 2
edd 10012 0
joydev 9664 0
sg 35744 0
st 37404 0
sd_mod 16912 0
sr_mod 16292 0
ide_cd 38176 0
cdrom 36380 2 sr_mod,ide_cd
subfs 7552 2
3c59x 37544 0
via_rhine 19972 0
mii 4992 1 via_rhine
ehci_hcd 29188 0
via_agp 8960 1
agpgart 32168 1 via_agp
uhci_hcd 29712 0
sata_via 7428 0
libata 41860 1 sata_via
scsi_mod 111052 5 sg,st,sd_mod,sr_mod,libata
evdev 8960 0
usbcore 106852 5 usbserial,ehci_hcd,uhci_hcd
raid1 15872 3
dm_mod 54524 5
reiserfs 242000 5
>lspci
0000:00:00.0 Host bridge: VIA Technologies, Inc. VT8377 [KT400/KT600
AGP] Host Bridge (rev 80)
0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
0000:00:0b.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M
[Tornado] (rev 74)
0000:00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA
RAID Controller (rev 80)
0000:00:0f.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
0000:00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller (rev 81)
0000:00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller (rev 81)
0000:00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller (rev 81)
0000:00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
1.1 Controller (rev 81)
0000:00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
0000:00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge
[K8T800 South]
0000:00:11.5 Multimedia audio controller: VIA Technologies, Inc.
VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
0000:00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102
[Rhine-II] (rev 78)
0000:01:00.0 VGA compatible controller: ATI Technologies Inc Radeon
RV100 QY [Radeon 7000/VE]
>cat /proc/modules | grep snd
snd_seq 53008 0 - Live 0xf9500000
snd_pcm_oss 57896 0 - Live 0xf9489000
snd_mixer_oss 19200 1 snd_pcm_oss, Live 0xf9470000
snd_via82xx 26276 0 - Live 0xf9385000
snd_ac97_codec 69728 1 snd_via82xx, Live 0xf93bb000
snd_pcm 96776 3 snd_pcm_oss,snd_via82xx,snd_ac97_codec, Live
0xf93a2000
snd_timer 24708 2 snd_seq,snd_pcm, Live 0xf937d000
snd_page_alloc 10248 2 snd_via82xx,snd_pcm, Live 0xf932c000
gameport 4608 1 snd_via82xx, Live 0xf9357000
snd_mpu401_uart 7552 1 snd_via82xx, Live 0xf9354000
snd_rawmidi 24356 1 snd_mpu401_uart, Live 0xf935d000
snd_seq_device 8716 2 snd_seq,snd_rawmidi, Live 0xf9350000
snd 60164 10 snd_seq,snd_pcm_oss,snd_mixer_oss,\
snd_via82xx,snd_ac97_codec,snd_pcm, \
snd_timer,snd_mpu401_uart,\
snd_rawmidi,snd_seq_device, Live 0xf9364000
soundcore 9056 1 snd, Live 0xf9330000
>ls -l /dev/ | grep dsp
lrwxrwxrwx 1 root root 5 Oct 31 17:00 adsp -> adsp0
crw-rw-rw- 1 root root 14, 12 Oct 2 2004 adsp0
crw-rw-rw- 1 root root 14, 28 Oct 2 2004 adsp1
crw-rw-rw- 1 root root 14, 44 Oct 2 2004 adsp2
crw-rw-rw- 1 root root 14, 60 Oct 2 2004 adsp3
lrwxrwxrwx 1 root root 4 Nov 14 00:05 dsp -> dsp0
crw-rw-rw- 1 root root 14, 3 Nov 13 22:50 dsp0
crw-rw-rw- 1 root root 14, 19 Oct 2 2004 dsp1
crw-rw-rw- 1 root root 14, 35 Oct 2 2004 dsp2
crw-rw-rw- 1 root root 14, 51 Oct 2 2004 dsp3
crw-rw-rw- 1 root root 55, 0 Oct 2 2004 dsp56k
>cat /proc/interrupts
CPU0
0: 3533611 XT-PIC timer
1: 9436 XT-PIC i8042
2: 0 XT-PIC cascade
3: 3418 XT-PIC ehci_hcd, VIA8233
5: 5704 XT-PIC eth1
9: 0 XT-PIC acpi
10: 0 XT-PIC libata, uhci_hcd, uhci_hcd
11: 6 XT-PIC uhci_hcd, uhci_hcd, eth0
12: 157767 XT-PIC i8042
14: 24849 XT-PIC ide0
15: 25015 XT-PIC ide1
NMI: 0
LOC: 0
ERR: 1
MIS: 0
--
Heinz Knoche
631heinz@xxxxxx
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