[alsa-devel] No jack sense on Intel 82801I / IDT 92HD71B7X in a HP dv4

[Takashi Iwai]

At Fri, 12 Jun 2009 15:01:09 -0300,
Gustavo Maciel Dias Vieira wrote:
> 
> Em Qui, 2009-06-11 às 21:27 +0200, Takashi Iwai escreveu:
> > > Interrupt 22 stays always with 0. Even when correctly playing
> > sounds. I
> > > tested this on another machine with HD-Audio, and the equivalent
> > > interrupt increased when playing. Also, in this other system
> > interrupt 0
> > > (timer) is hardly issued, but in this laptop it is firing all the
> > time.
> > > 
> > > How can the driver be working without interrupts?
> > 
> > That's weird.
> > 
> > Did you try enable_msi=1 module option, BTW?
> 
> Just tried now. The interrupts started flowing and, tada, jack sense
> works!
> 
> Thanks, Takashi, that solves it for me. Is there a way to automate this
> in the driver for the other less technically inclined users?

Well, as I mentioned, it's basically a bug in the lower layer like
ACPI or BIOS.  So, the best is to fix them.  Using MSI is a kind of
workaround, and I'm wondering whether this is specific to your device
or in general with other HP dv4, since I didn't hear of the similar
bug reports.


Takashi