Please, by all means be as anal as you like :) - here are the requested outputs: 

[1] Mixers:
0: Realtek ALC262

[2] Amixer

Simple mixer control 'Headphone',0
  Capabilities: pswitch
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [on]
  Front Right: Playback [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 255 [100%]
  Front Right: Playback 255 [100%]
Simple mixer control 'Front',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 31 [100%] [on]
  Front Right: Playback 31 [100%] [on]
Simple mixer control 'Front Mic',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 31 [100%] [on]
  Front Right: Playback 31 [100%] [on]
Simple mixer control 'Line',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 31 [100%] [on]
  Front Right: Playback 31 [100%] [on]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 31
  Front Left: Capture 19 [61%] [off]
  Front Right: Capture 19 [61%] [off]
Simple mixer control 'Capture',1
  Capabilities: cvolume cswitch
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 31
  Front Left: Capture 16 [52%] [off]
  Front Right: Capture 16 [52%] [off]
Simple mixer control 'Capture',2
  Capabilities: cvolume cswitch
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 31
  Front Left: Capture 17 [55%] [off]
  Front Right: Capture 17 [55%] [off]
Simple mixer control 'Caller ID',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Input Source',0
  Capabilities: enum
  Items: 'Front Mic' 'Line'
  Item0: 'Front Mic'
Simple mixer control 'Input Source',1
  Capabilities: enum
  Items: 'Front Mic' 'Line'
  Item0: 'Front Mic'
Simple mixer control 'Input Source',2
  Capabilities: enum
  Items: 'Front Mic' 'Line'
  Item0: 'Front Mic'
Simple mixer control 'Off-hook',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Speaker',0
  Capabilities: pswitch
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [on]
  Front Right: Playback [on]

[3] lspci -nv

00:00.0 0600: 8086:27a0 (rev 03)
        Subsystem: 1179:0001
        Flags: bus master, fast devsel, latency 0
        Capabilities: <access denied>

00:02.0 0300: 8086:27a2 (rev 03)
        Subsystem: 1179:0005
        Flags: bus master, fast devsel, latency 0, IRQ 233
        Memory at ffd80000 (32-bit, non-prefetchable) [size=512K]
        I/O ports at cff8 [size=8]
        Memory at e0000000 (32-bit, prefetchable) [size=256M]
        Memory at ffd40000 (32-bit, non-prefetchable) [size=256K]
        Capabilities: <access denied>

00:02.1 0380: 8086:27a6 (rev 03)
        Subsystem: 1179:0005
        Flags: fast devsel
        Memory at 55000000 (32-bit, non-prefetchable) [disabled] [size=512K]
        Capabilities: <access denied>

00:1b.0 0403: 8086:27d8 (rev 02)
        Subsystem: 1179:0001
        Flags: bus master, fast devsel, latency 0, IRQ 58
        Memory at 55080000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>

00:1c.0 0604: 8086:27d0 (rev 02)
        Flags: bus master, fast devsel, latency 0
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        I/O behind bridge: 0000b000-0000bfff
        Memory behind bridge: ffc00000-ffcfffff
        Capabilities: <access denied>

00:1c.2 0604: 8086:27d4 (rev 02)
        Flags: bus master, fast devsel, latency 0
        Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
        Memory behind bridge: ffa00000-ffafffff
        Capabilities: <access denied>

00:1d.0 0c03: 8086:27c8 (rev 02)
        Subsystem: 1179:0001
        Flags: bus master, medium devsel, latency 0, IRQ 225
        I/O ports at afe0 [size=32]

00:1d.1 0c03: 8086:27c9 (rev 02)
        Subsystem: 1179:0001
        Flags: bus master, medium devsel, latency 0, IRQ 217
        I/O ports at af80 [size=32]

00:1d.2 0c03: 8086:27ca (rev 02)
        Subsystem: 1179:0001
        Flags: bus master, medium devsel, latency 0, IRQ 177
        I/O ports at af60 [size=32]

00:1d.3 0c03: 8086:27cb (rev 02)
        Subsystem: 1179:0001
        Flags: bus master, medium devsel, latency 0, IRQ 233
        I/O ports at af40 [size=32]

00:1d.7 0c03: 8086:27cc (rev 02) (prog-if 20)
        Subsystem: 1179:0001
        Flags: bus master, medium devsel, latency 0, IRQ 225
        Memory at ffd3fc00 (32-bit, non-prefetchable) [size=1K]
        Capabilities: <access denied>

00:1e.0 0604: 8086:2448 (rev e2) (prog-if 01)
        Flags: bus master, fast devsel, latency 0
        Bus: primary=00, secondary=03, subordinate=07, sec-latency=32
        I/O behind bridge: 00001000-00001fff
        Memory behind bridge: 52000000-54ffffff
        Prefetchable memory behind bridge: 0000000050000000-0000000051f00000
        Capabilities: <access denied>

00:1f.0 0601: 8086:27b9 (rev 02)
        Subsystem: 1179:0001
        Flags: bus master, medium devsel, latency 0
        Capabilities: <access denied>

00:1f.2 0101: 8086:27c4 (rev 02) (prog-if 80)
        Subsystem: 1179:0001
        Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 217
        I/O ports at <ignored>
        I/O ports at <ignored>
        I/O ports at <ignored>
        I/O ports at <ignored>
        I/O ports at af10 [size=16]
        Capabilities: <access denied>

01:00.0 0200: 8086:109a
        Subsystem: 1179:0001
        Flags: bus master, fast devsel, latency 0, IRQ 233
        Memory at ffce0000 (32-bit, non-prefetchable) [size=128K]
        I/O ports at bfe0 [size=32]
        Capabilities: <access denied>

02:00.0 0280: 8086:4222 (rev 02)
        Subsystem: 8086:1041
        Flags: bus master, fast devsel, latency 0, IRQ 177
        Memory at ffaff000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: <access denied>

03:0b.0 0607: 104c:8039
        Subsystem: 1179:0001
        Flags: bus master, medium devsel, latency 168, IRQ 185
        Memory at 54004000 (32-bit, non-prefetchable) [size=4K]
        Bus: primary=03, secondary=04, subordinate=07, sec-latency=176
        Memory window 0: 50000000-51fff000 (prefetchable)
        Memory window 1: 52000000-53fff000
        I/O window 0: 00001000-000010ff
        I/O window 1: 00001400-000014ff
        16-bit legacy interface ports at 0001

03:0b.1 0c00: 104c:803a (prog-if 10)
        Subsystem: 1179:0001
        Flags: bus master, medium devsel, latency 64, IRQ 50
        Memory at 54005000 (32-bit, non-prefetchable) [size=2K]
        Memory at 54000000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>

03:0b.3 0805: 104c:803c (prog-if 01)
        Subsystem: 1179:0001
        Flags: bus master, medium devsel, latency 64, IRQ 225
        Memory at 54005800 (32-bit, non-prefetchable) [size=256]
        Capabilities: <access denied>

[4] asoundconf list
Names of available sound cards:
Intel

[5] cat /etc/asound.conf ~/.asoundrc*

cat: /etc/asound.conf: No such file or directory
cat: /home/steve/.asoundrc*: No such file or directory

[6] dmesg

Gives a seemingly endless list of:

[17186370.596000 (second number varies)] APIC error on CPU1: 40(40)

[7] cat /proc/interrupts

           CPU0       CPU1       
  0:    3189001          0    IO-APIC-edge  timer
  1:      24538          0    IO-APIC-edge  i8042
  8:         32          0    IO-APIC-edge  rtc
  9:       1084          0   IO-APIC-level  acpi
 12:     297335          0    IO-APIC-edge  i8042
 14:      31958          0    IO-APIC-edge  libata
 15:      90305          0    IO-APIC-edge  libata
 50:          3          0   IO-APIC-level  ohci1394
 58:      15427          0   IO-APIC-level  HDA Intel
177:     412360          0   IO-APIC-level  uhci_hcd:usb3, ipw3945
185:          1          0   IO-APIC-level  yenta
217:          0          0   IO-APIC-level  uhci_hcd:usb2
225:          0          0   IO-APIC-level  uhci_hcd:usb1, ehci_hcd:usb5, sdhci:slot0
233:    1048047          0   IO-APIC-level  uhci_hcd:usb4, eth0, i915@pci:0000:00:02.0
NMI:          0          0 
LOC:    3188832    3188831 
ERR:       1118
MIS:          0