Hi,
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
Weird indeed. Actually I had already reported this behaviour, see
http://article.gmane.org/gmane.linux.alsa.devel/59809
So far I have not been able to get the interrupts at IRQ22. They still occur at IRQ20. However the problem is hidden when using boot options irqpoll or noapic.
This is not a hardware or bios problem, as the sound is correct on Windows.
Initially I was using kernel 2.6.27 and alsa-driver 1.0.19, currently using kernel 2.6.29 and alsa-driver 1.0.20 with the same behaviour.
I have tried numerous modprobe options. Currently I am using :
alias snd-card-0 snd-hda-intel options sound slots=snd-hda-intel options snd-hda-intel model=hp-m4 enable_msi=1 bdl_pos_adj=32 probe_mask=0x1ff
As Gustavo seems to have succeeded, can he post kernel and alsa-driver versions, boot parameters and modprobe parameters ?
Thanks in advance
Jean-Pierre