[LAU] Jack problems on Dell M90

I'm hoping I'll be able to find someone else with a similar setup that has
overcome their problems to get realtime operation, at least in one
direction, with no xruns.

Setup:
Dell M90 (intel-hda audio)
Kernel 2.6.24 RT PREMPT SMP from gentoo pro-audio feed
quadro 1500fx with nvidia driver (i'd really like to keep this driver,
unless compiz works now with the nv driver)

I've tried multiple combinations of: irqpoll noacpi noapic pci=biosirq, some
combinations help to reduce latency, but not enough to be useable

I have GNX4 Guitar interface that works as a usb device, its almost useable
with the same settings the intel-hda card skips with.
I have an Opteron with sb-live that no no latency problems, and the GNX4
works great with it.

What suggestions for Frames/Period, Sample Rate, Periods/Buffer would people
reccomend to make this useable. I really just want to be able to mix and
output audio in realtime on my laptop with its intel-hda card, full duples
with the GNX4 on it would be an added bonus.

If anyone is willing to look over the kernel config I can send them It,
didn't want to clutter the list with it now.

 cat /proc/interrupts
           CPU0 CPU1
  0: 20489426 0 XT-PIC-XT timer
  1: 14552 0 XT-PIC-XT i8042
  2: 0 0 XT-PIC-XT cascade
  5: 0 0 XT-PIC-XT uhci_hcd:usb4
  7: 2008 0 XT-PIC-XT ipw3945
  8: 2 0 XT-PIC-XT rtc
  9: 2930465 0 XT-PIC-XT acpi, uhci_hcd:usb3, nvidia
 10: 269 0 XT-PIC-XT uhci_hcd:usb1, ehci_hcd:usb5
 11: 1627576 0 XT-PIC-XT uhci_hcd:usb2, HDA Intel
 12: 16281 0 XT-PIC-XT i8042
 14: 60131 0 XT-PIC-XT libata
 15: 64207 0 XT-PIC-XT libata
218: 1624641 0 PCI-MSI-edge eth0
NMI: 0 0 Non-maskable interrupts
LOC: 5672972 14563710 Local timer interrupts
RES: 9766464 13228888 Rescheduling interrupts
CAL: 46404 41727 function call interrupts
TLB: 21123 35433 TLB shootdowns
TRM: 0 0 Thermal event interrupts
SPU: 0 0 Spurious interrupts
ERR: 0
MIS: 0

Thanks in advance,
Nathanael

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Received on Sun Mar 23 20:15:04 2008