CMI8738 sound card - cannot hear sound in Lenny

To: "debian-user (submission address)" <debian-user@lists.debian.org>
Subject: CMI8738 sound card - cannot hear sound in Lenny
From: Robert Canner <robert.canner@tiscali.co.uk>
Date: Thu, 15 Jan 2009 23:10:43 +0000
Message-id: <[🔎] 1232061043.9128.2.camel@mercury.canner-newcombe>
Hi folks,

I've installed a CMI8738 PCI sound card (C-Media 8738) on my dual-boot
machine. When I boot Windows, I can hear sound, but when I boot
GNU/Linux, I can't hear any sound.
  I have tried 3 different ways of generating sound:
    (1) Gnome Desktop|Preferences|Sound|enable System Sounds
    (2) Gnome CD Player
    (3) $ cat /usr/share/sounds/alsa/Front_Center.wav >/dev/dsp
        bash: /dev/dsp: Device or resource busy

The motherboard (Intel D865GBF) has an on-board sound system, which I
disabled in the BIOS setup before installing the CMI8738 card.

==
$ uname -a
Linux mercury 2.6.18-6-686 #1 SMP Fri Dec 12 16:48:28 UTC 2008 i686
GNU/Linux
==
$ groups
robert dialout cdrom floppy audio video plugdev netdev powerdev
==
$ dmesg
Linux version 2.6.18-6-686 (Debian 2.6.18.dfsg.1-23etch1)
(dannf@debian.org) (gcc version 4.1.2 20061115 (prerelease) (Debian
4.1.1-21)) #1 SMP Fri Dec 12 16:48:28 UTC 2008
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
 BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000e6000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000003ef30000 (usable)
 BIOS-e820: 000000003ef30000 - 000000003ef40000 (ACPI data)
 BIOS-e820: 000000003ef40000 - 000000003eff0000 (ACPI NVS)
 BIOS-e820: 000000003eff0000 - 000000003f000000 (reserved)
 BIOS-e820: 00000000fecf0000 - 00000000fecf1000 (reserved)
 BIOS-e820: 00000000fed20000 - 00000000feda0000 (reserved)
111MB HIGHMEM available.
896MB LOWMEM available.
found SMP MP-table at 000ff780
On node 0 totalpages: 257840
  DMA zone: 4096 pages, LIFO batch:0
  Normal zone: 225280 pages, LIFO batch:31
  HighMem zone: 28464 pages, LIFO batch:7
DMI 2.3 present.
ACPI: RSDP (v000 ACPIAM                                ) @ 0x000f58f0
ACPI: RSDT (v001 INTEL  D865GBF  0x20030423 MSFT 0x00000097) @
0x3ef30000
ACPI: FADT (v002 INTEL  D865GBF  0x20030423 MSFT 0x00000097) @
0x3ef30200
ACPI: MADT (v001 INTEL  D865GBF  0x20030423 MSFT 0x00000097) @
0x3ef30300
ACPI: WDDT (v001 INTEL  OEMWDDT  0x00000001 MSFT 0x0100000d) @
0x3ef35244
ACPI: DSDT (v001 INTEL  D865GBF  0x00000001 MSFT 0x0100000d) @
0x00000000
ACPI: PM-Timer IO Port: 0x408
ACPI: Local APIC address 0xfee00000
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
Processor #0 15:2 APIC version 20
ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] disabled)
ACPI: LAPIC_NMI (acpi_id[0x01] dfl dfl lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x02] dfl dfl lint[0x1])
ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
ACPI: IRQ0 used by override.
ACPI: IRQ2 used by override.
ACPI: IRQ9 used by override.
Enabling APIC mode:  Flat.  Using 1 I/O APICs
Using ACPI (MADT) for SMP configuration information
Allocating PCI resources starting at 40000000 (gap: 3f000000:bfcf0000)
Detected 3192.413 MHz processor.
Built 1 zonelists.  Total pages: 257840
Kernel command line: root=/dev/hda3 ro
mapped APIC to ffffd000 (fee00000)
mapped IOAPIC to ffffc000 (fec00000)
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 16384 bytes)
Console: colour VGA+ 80x25
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Memory: 1014368k/1031360k available (1543k kernel code, 16324k reserved,
578k data, 196k init, 113856k highmem)
Checking if this processor honours the WP bit even in supervisor mode...
Ok.
Calibrating delay using timer specific routine.. 6389.15 BogoMIPS
(lpj=12778319)
Security Framework v1.0.0 initialized
SELinux:  Disabled at boot.
Capability LSM initialized
Mount-cache hash table entries: 512
CPU: After generic identify, caps: bfebfbff 00000000 00000000 00000000
00004400 00000000 00000000
CPU: After vendor identify, caps: bfebfbff 00000000 00000000 00000000
00004400 00000000 00000000
CPU: Trace cache: 12K uops, L1 D cache: 8K
CPU: L2 cache: 512K
CPU: Physical Processor ID: 0
CPU: After all inits, caps: bfebfbff 00000000 00000000 00000080 00004400
00000000 00000000
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU0: Intel P4/Xeon Extended MCE MSRs (12) available
CPU0: Thermal monitoring enabled
Compat vDSO mapped to ffffe000.
Checking 'hlt' instruction... OK.
SMP alternatives: switching to UP code
Freeing SMP alternatives: 12k freed
ACPI: Core revision 20060707
CPU0: Intel(R) Pentium(R) 4 CPU 3.20GHz stepping 09
Total of 1 processors activated (6389.15 BogoMIPS).
ENABLING IO-APIC IRQs
..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1
Brought up 1 CPUs
migration_cost=0
checking if image is initramfs... it is
Freeing initrd memory: 4780k freed
NET: Registered protocol family 16
ACPI: bus type pci registered
PCI: PCI BIOS revision 2.10 entry at 0xf0031, last bus=2
PCI: Using configuration type 1
Setting up standard PCI resources
ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (0000:00)
PCI: Probing PCI hardware (bus 00)
Boot video device is 0000:00:02.0
PCI quirk: region 0400-047f claimed by ICH4 ACPI/GPIO/TCO
PCI quirk: region 0500-053f claimed by ICH4 GPIO
PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.1
PCI: Transparent bridge - 0000:00:1e.0
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P2._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P3._PRT]
ACPI: Power Resource [URP1] (off)
ACPI: Power Resource [FDDP] (off)
ACPI: Power Resource [LPTP] (off)
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs *3 4 5 6 7 9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 *10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 *5 6 7 9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 10 11 12 14 15) *0,
disabled.
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 9 10 11 12 14 15) *0,
disabled.
ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 *9 10 11 12 14 15)
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI init
pnp: PnP ACPI: found 14 devices
PnPBIOS: Disabled by ACPI PNP
PCI: Using ACPI for IRQ routing
PCI: If a device doesn't work, try "pci=routeirq".  If it helps, post a
report
pnp: 00:0c: ioport range 0x400-0x47f could not be reserved
pnp: 00:0c: ioport range 0x680-0x6ff has been reserved
pnp: 00:0c: ioport range 0x500-0x53f has been reserved
PCI: Ignore bogus resource 6 [0:0] of 0000:00:02.0
PCI: Bridge: 0000:00:03.0
  IO window: a000-afff
  MEM window: ff800000-ff8fffff
  PREFETCH window: disabled.
PCI: Bridge: 0000:00:1e.0
  IO window: b000-bfff
  MEM window: disabled.
  PREFETCH window: disabled.
PCI: Setting latency timer of device 0000:00:1e.0 to 64
NET: Registered protocol family 2
IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
TCP reno registered
audit: initializing netlink socket (disabled)
audit(1232034079.760:1): initialized
highmem bounce pool size: 64 pages
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12
serio: i8042 AUX port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
mice: PS/2 mouse device common for all mice
TCP bic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
NET: Registered protocol family 8
NET: Registered protocol family 20
Using IPI No-Shortcut mode
ACPI: (supports S0 S1 S3 S4 S5)
Freeing unused kernel memory: 196k freed
Time: tsc clocksource has been installed.
input: AT Translated Set 2 keyboard as /class/input/input0
ACPI: Processor [CPU1] (supports 8 throttling states)
ACPI Exception (acpi_processor-0681): AE_NOT_FOUND, Processor Device is
not present [20060707]
ACPI: Getting cpuindex for acpiid 0x2
usbcore: registered new driver usbfs
usbcore: registered new driver hub
USB Universal Host Controller Interface driver v3.0
ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 16 (level, low) -> IRQ 169
PCI: Setting latency timer of device 0000:00:1d.0 to 64
uhci_hcd 0000:00:1d.0: UHCI Host Controller
uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1
uhci_hcd 0000:00:1d.0: irq 169, io base 0x0000c800
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
Intel(R) PRO/1000 Network Driver - version 7.1.9-k4-NAPI
Copyright (c) 1999-2006 Intel Corporation.
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 19 (level, low) -> IRQ 177
PCI: Setting latency timer of device 0000:00:1d.1 to 64
uhci_hcd 0000:00:1d.1: UHCI Host Controller
uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2
uhci_hcd 0000:00:1d.1: irq 177, io base 0x0000cc00
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 185
PCI: Setting latency timer of device 0000:00:1d.2 to 64
uhci_hcd 0000:00:1d.2: UHCI Host Controller
uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 3
uhci_hcd 0000:00:1d.2: irq 185, io base 0x0000d000
usb usb3: configuration #1 chosen from 1 choice
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:00:1d.3[A] -> GSI 16 (level, low) -> IRQ 169
PCI: Setting latency timer of device 0000:00:1d.3 to 64
uhci_hcd 0000:00:1d.3: UHCI Host Controller
uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 4
uhci_hcd 0000:00:1d.3: irq 169, io base 0x0000d400
usb usb4: configuration #1 chosen from 1 choice
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
usb 1-2: new full speed USB device using uhci_hcd and address 2
ACPI: PCI Interrupt 0000:00:1d.7[D] -> GSI 23 (level, low) -> IRQ 193
PCI: Setting latency timer of device 0000:00:1d.7 to 64
ehci_hcd 0000:00:1d.7: EHCI Host Controller
ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 5
ehci_hcd 0000:00:1d.7: debug port 1
PCI: cache line size of 128 is not supported by device 0000:00:1d.7
ehci_hcd 0000:00:1d.7: irq 193, io mem 0xffa7fc00
ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004
usb usb5: configuration #1 chosen from 1 choice
hub 5-0:1.0: USB hub found
hub 5-0:1.0: 8 ports detected
SCSI subsystem initialized
ACPI: PCI Interrupt 0000:01:01.0[A] -> GSI 18 (level, low) -> IRQ 185
PCI: Setting latency timer of device 0000:01:01.0 to 64
libata version 2.00 loaded.
e1000: 0000:01:01.0: e1000_probe: (PCI:33MHz:32-bit) 00:07:e9:5d:4c:4a
usb 1-2: device not accepting address 2, error -71
e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
ICH5: IDE controller at PCI slot 0000:00:1f.1
PCI: Enabling device 0000:00:1f.1 (0005 -> 0007)
ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 185
ICH5: chipset revision 2
ICH5: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:pio
Probing IDE interface ide0...
usb 5-2: new high speed USB device using ehci_hcd and address 2
hda: WDC WD400EB-00CPF0, ATA DISK drive
usb 5-2: configuration #1 chosen from 1 choice
hub 5-2:1.0: USB hub found
hub 5-2:1.0: 4 ports detected
hdb: ST340016A, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Probing IDE interface ide1...
hdc: DVDRW IDE H16X, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15
ata_piix 0000:00:1f.2: version 2.00
ata_piix 0000:00:1f.2: MAP [ P0 -- P1 -- ]
ACPI: PCI Interrupt 0000:00:1f.2[A] -> GSI 18 (level, low) -> IRQ 185
PCI: Setting latency timer of device 0000:00:1f.2 to 64
ata1: SATA max UDMA/133 cmd 0xE800 ctl 0xE402 bmdma 0xD800 irq 185
ata2: SATA max UDMA/133 cmd 0xE000 ctl 0xDC02 bmdma 0xD808 irq 185
scsi0 : ata_piix
hda: max request size: 128KiB
hda: 78165360 sectors (40020 MB) w/2048KiB Cache, CHS=65535/16/63,
UDMA(100)
hda: cache flushes not supported
 hda: hda1 < hda5 hda6 hda7 hda8 hda9 hda10 > hda2 hda3
hdb: max request size: 128KiB
hdb: 78165360 sectors (40020 MB) w/2048KiB Cache, CHS=65535/16/63,
UDMA(100)
hdb: cache flushes not supported
 hdb: hdb1
hdc: ATAPI 48X DVD-ROM DVD-R-RAM CD-R/RW drive, 2048kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20
ATA: abnormal status 0x7F on port 0xE807
scsi1 : ata_piix
ATA: abnormal status 0x7F on port 0xE007
Attempting manual resume
kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
Linux agpgart interface v0.101 (c) Dave Jones
agpgart: Detected an Intel 865 Chipset.
agpgart: Detected 16252K stolen memory.
agpgart: AGP aperture is 128M @ 0xf0000000
input: PC Speaker as /class/input/input1
Intel 82802 RNG detected
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
Real Time Clock Driver v1.12ac
parport: PnPBIOS parport detected.
parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE,EPP]
ACPI: PCI Interrupt 0000:00:1f.3[B] -> GSI 17 (level, low) -> IRQ 201
ACPI: PCI Interrupt 0000:02:00.0[A] -> GSI 21 (level, low) -> IRQ 209
input: ImExPS/2 Generic Explorer Mouse as /class/input/input2
ts: Compaq touchscreen protocol output
Adding 1654652k swap on /dev/hda8.  Priority:-1 extents:1
across:1654652k
EXT3 FS on hda3, internal journal
loop: loaded (max 8 devices)
ieee1394: Initialized config rom entry `ip1394'
ieee1394: sbp2: Driver forced to serialize I/O (serialize_io=1)
ieee1394: sbp2: Try serialize_io=0 for better performance
device-mapper: ioctl: 4.7.0-ioctl (2006-06-24) initialised:
dm-devel@redhat.com
kjournald starting.  Commit interval 5 seconds
EXT3 FS on hda10, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on hda9, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on hda6, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on hda7, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
e1000: eth1: e1000_watchdog: NIC Link is Up 100 Mbps Full Duplex
ACPI: Power Button (FF) [PWRF]
ACPI: Sleep Button (CM) [SLPB]
lp0: using parport0 (interrupt-driven).
ppdev: user-space parallel port driver
NET: Registered protocol family 10
lo: Disabled Privacy Extensions
IPv6 over IPv4 tunneling driver
[drm] Initialized drm 1.0.1 20051102
ACPI: PCI Interrupt 0000:00:02.0[A] -> GSI 16 (level, low) -> IRQ 169
[drm] Initialized i915 1.5.0 20060119 on minor 0
eth1: no IPv6 routers present
==
$ lspci
00:00.0 Host bridge: Intel Corporation 82865G/PE/P DRAM
Controller/Host-Hub Interface (rev 02)
00:02.0 VGA compatible controller: Intel Corporation 82865G Integrated
Graphics Controller (rev 02)
00:03.0 PCI bridge: Intel Corporation 82865G/PE/P PCI to CSA Bridge (rev
02)
00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB
UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB
UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB
UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB
UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB2
EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c2)
00:1f.0 ISA bridge: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC
Interface Bridge (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801EB/ER (ICH5/ICH5R) IDE
Controller (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801EB (ICH5) SATA Controller
(rev 02)
00:1f.3 SMBus: Intel Corporation 82801EB/ER (ICH5/ICH5R) SMBus
Controller (rev 02)
01:01.0 Ethernet controller: Intel Corporation 82547EI Gigabit Ethernet
Controller (LOM)
02:00.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev
10)
==
$ lspci -v
...
02:00.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev
10)
        Subsystem: C-Media Electronics Inc CMI8738/C3DX PCI Audio Device
        Flags: bus master, medium devsel, latency 32, IRQ 209
        I/O ports at b800 [size=256]
        Capabilities: <access denied>
==
$ cat /proc/asound/cards
 0 [CMI8738        ]: CMI8738 - C-Media PCI CMI8738
                      C-Media PCI CMI8738 (model 37) at 0xb800, irq 209
==
$ cat /proc/interrupts
           CPU0
  0:     103538    IO-APIC-edge  timer
  1:        691    IO-APIC-edge  i8042
  6:          5    IO-APIC-edge  floppy
  7:          0    IO-APIC-edge  parport0
  8:          1    IO-APIC-edge  rtc
  9:          1   IO-APIC-level  acpi
 12:      29611    IO-APIC-edge  i8042
 14:      11577    IO-APIC-edge  ide0
 15:       1192    IO-APIC-edge  ide1
169:      27570   IO-APIC-level  uhci_hcd:usb1, uhci_hcd:usb4,
i915@pci:0000:00:02.0
177:          0   IO-APIC-level  uhci_hcd:usb2
185:        247   IO-APIC-level  uhci_hcd:usb3, libata, eth1
193:         23   IO-APIC-level  ehci_hcd:usb5
209:        155   IO-APIC-level  CMI8738
NMI:          0
LOC:     103501
ERR:          0
MIS:          0
==

(When I boot Windows, it says the CMI8738 card is using IRQ 21.)

I have also tried booting Lenny with the 'noapic' option -- in this case
the IRQs are assigned as follows, but I still hear no sound:

==
$ cat /proc/interrupts
           CPU0
  0:    1657331          XT-PIC  timer
  1:       4866          XT-PIC  i8042
  2:          0          XT-PIC  cascade
  5:          0          XT-PIC  uhci_hcd:usb2
  6:          5          XT-PIC  floppy
  7:          0          XT-PIC  parport0
  8:          1          XT-PIC  rtc
  9:         24          XT-PIC  acpi, ehci_hcd:usb5
 10:      10904          XT-PIC  uhci_hcd:usb3, libata, eth1
 11:     498034          XT-PIC  uhci_hcd:usb1, uhci_hcd:usb4, CMI8738,
i915@pci:0000:00:02.0
 12:     284384          XT-PIC  i8042
 14:      30749          XT-PIC  ide0
 15:      19809          XT-PIC  ide1
NMI:          0
LOC:    1657303
ERR:          0
MIS:          0
==

I've spent a few days reading various pieces of documentation about
sound/PCI configuration, and I'm starting to run out of ideas ...


Thank you very much,
Robert Canner
London, UK
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