* Booted a live Saucy from pendrive:

ubuntu@ubuntu:~$ uname -a
Linux ubuntu 3.10.0-6-generic #17-Ubuntu SMP Fri Jul 26 18:29:23 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

ubuntu@ubuntu:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu Saucy Salamander (development branch)
Release:	13.10
Codename:	saucy

* Disabled pulseaudio autospawn and ran with verbose logging as per wiki instructions (log attached).

* Installed mumble and ran it from a terminal, audio playback broke immediatly (the faster I ever seen). Mumble crashed with:

ubuntu@ubuntu:~$ mumble
G15LCDEngineUnix: Unable to connect to G15Daemon.
CELT bitstream 8000000b from /usr/lib/mumble/libcelt0.so.0.7.0
Locale is en_US
Database SQLite: "3.7.17" 
Overlay: Listening on "/home/ubuntu/.MumbleOverlayPipe" 
GlobalShortcutX: Unable to open any keyboard input devices under /dev/input, falling back to XInput
GlobalShortcutX: Using XI2 2.0
AudioInput: 40000 bits/s, 48000 hz, 480 sample CELT
PulseAudio: Starting output: alsa_output.pci-0000_00_1b.0.analog-stereo
PulseAudio: Starting input alsa_input.pci-0000_00_1b.0.analog-stereo
AudioOutput: Initialized 2 channel 44100 hz mixer
AudioInput: Initialized mixer for 1 channel 44100 hz mic and 0 channel 48000 hz echo
warning: The VAD has been replaced by a hack pending a complete rewrite
AudioInput: 40000 bits/s, 48000 hz, 480 sample CELT
AudioInput: 40000 bits/s, 48000 hz, 480 sample CELT
AudioInput: Initialized mixer for 1 channel 44100 hz mic and 0 channel 48000 hz echo
AudioOutput: Initialized 2 channel 44100 hz mixer
warning: The VAD has been replaced by a hack pending a complete rewrite
AudioInput: 40000 bits/s, 48000 hz, 480 sample CELT
AudioInput: Initialized mixer for 1 channel 44100 hz mic and 0 channel 48000 hz echo
warning: The VAD has been replaced by a hack pending a complete rewrite
AudioOutput: Initialized 2 channel 44100 hz mixer
AudioInput: 40000 bits/s, 48000 hz, 480 sample CELT
AudioInput: Initialized mixer for 1 channel 44100 hz mic and 0 channel 48000 hz echo
warning: The VAD has been replaced by a hack pending a complete rewrite
AudioOutput: Initialized 2 channel 44100 hz mixer
AudioInput: 40000 bits/s, 48000 hz, 480 sample CELT
AudioInput: Initialized mixer for 1 channel 44100 hz mic and 0 channel 48000 hz echo
warning: The VAD has been replaced by a hack pending a complete rewrite
AudioOutput: Initialized 2 channel 44100 hz mixer
Bus error (core dumped)

* Interrupts are:

ubuntu@ubuntu:~$ cat /proc/interrupts 
           CPU0       CPU1       CPU2       CPU3       
  0:         43          0          0          0   IO-APIC-edge      timer
  1:          1          0          0          2   IO-APIC-edge      i8042
  8:          0          0          0          1   IO-APIC-edge      rtc0
  9:          0          0          0          0   IO-APIC-fasteoi   acpi
 12:          1          0          0          4   IO-APIC-edge      i8042
 16:          0        377      74074          0   IO-APIC-fasteoi   ehci_hcd:usb1, nouveau
 19:       1808         10          0          0   IO-APIC-fasteoi   ata_piix, ata_piix, firewire_ohci
 21:      24882          0         84          0   IO-APIC-fasteoi   eth0
 23:       2466      28597       7310        784   IO-APIC-fasteoi   ehci_hcd:usb2
 40:      59527          0          0          0  HPET_MSI-edge      hpet2
 41:          0      74932          0          0  HPET_MSI-edge      hpet3
 42:          0          0      66277          0  HPET_MSI-edge      hpet4
 43:          0          0          0      43154  HPET_MSI-edge      hpet5
 45:   17522079          0          0          0   PCI-MSI-edge      snd_hda_intel
NMI:        274         61         61         64   Non-maskable interrupts
LOC:         21         17         14         11   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:        274         61         61         64   Performance monitoring interrupts
IWI:       1366       1317       1161       1144   IRQ work interrupts
RTR:          3          0          0          0   APIC ICR read retries
RES:     120151     138893     125910     129051   Rescheduling interrupts
CAL:        419        389        453        410   Function call interrupts
TLB:       1506       1669        903       1460   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
MCE:          0          0          0          0   Machine check exceptions
MCP:          4          4          4          4   Machine check polls
ERR:          0
MIS:          0