27 Feb
2009
27 Feb
'09
10:51 a.m.
On Thu, Feb 26, 2009 at 7:55 PM, Bradley Reed <bradreed1(a)gmail.com> wrote:
On Thu, 26 Feb 2009 19:20:48 -0200
tizo <tizone(a)gmail.com> wrote:
That work perfectly. In my ubuntustudio the file to edit was
/etc/modprobe.d/alsa-base. My sound card now has its own IRQ (508).
I raise the priority of that IRQ, but sadly, the latency of jack did
not improve.
Thanks very much,
tizo
Looking at the different IRQ, I have saw that my
sound card is sharing
the IRQ 16 with an USB port, and the video driver. This is a cat of
/proc/interrupts:
I have searched a lot on Internet, and even in the list, and I have
not found a way to change the IRQ assignments. In fact, I have read
some mails that said that I can't do that in a laptop (except in some
Thinkpads, where IRQ can be changed in the BIOS), as in PCs this can
be done changing the card to other slot. In other places, some kernel
parameters were suggested to obtain other IRQ assignments, but the
only parameter that change those in my computer, was "acpi=off", and
it was not better. In this case, /proc/interrupts shows the following:
When you load the snd-hda-intel module include the enable_msi=1 option.
I do this on my laptop by adding the line:
options snd-hda-intel enable_msi=1
to my /etc/modprobe.d/sound file (but the file may be different on
your distro. I use Slackware.)
This moves my sound card to an interrupt of its own on my laptop.
HTH,
Brad
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