26 Feb
2009
26 Feb
'09
10:53 p.m.
On Thu, Feb 26, 2009 at 11:55:42PM +0200, Bradley Reed wrote:
On Thu, 26 Feb 2009 19:20:48 -0200
tizo <tizone(a)gmail.com> wrote:
Holy cow, it works!! Thanks!
I've seen the advice to use enable_msi but never saw an explanation of WHY to do that
or what it did, so I stayed away from it.
It's awesome. I can actually run seq24 on my EEE with my full suite of basic keyboard
sounds, and the screen updates often enough to make it almost usable.
Not that I'm going to do any serious work on an EEE with the built-in HDA-Intel card,
but it does in fact work, well enough for street performances and possibly casual gigs
too.
-ken
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.