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

[Gustavo Vieira]

Em Sáb, 2009-06-06 às 11:04 +0200, Takashi Iwai escreveu:
> > I'm not sure what interrupt I should be monitoring, but the line
> with
> > "HDA Intel" always stays with 0 interrupts. Also, only timer, i915
> and
> > rescheduling interrupts are generated.
> 
> Hm, but when you play or record something, interrupts must be
> generated, right?

No. Not at all. Here is the output of /proc/interrupts

           CPU0       CPU1       
  0:      37864      38144   IO-APIC-edge      timer
  1:          5        511   IO-APIC-edge      i8042
  8:          7          9   IO-APIC-edge      rtc0
  9:       1048        652   IO-APIC-fasteoi   acpi
 12:         51         57   IO-APIC-edge      i8042
 16:         53         80   IO-APIC-fasteoi   uhci_hcd:usb3, mmc0,
jmb38x_ms:slot0
 17:          0          0   IO-APIC-fasteoi   uhci_hcd:usb4
 18:          0          3   IO-APIC-fasteoi   ehci_hcd:usb1,
uhci_hcd:usb7
 20:         30       2628   IO-APIC-fasteoi   ehci_hcd:usb2,
uhci_hcd:usb5
 22:          0          0   IO-APIC-fasteoi   uhci_hcd:usb6, HDA Intel
 29:      13017       1545   PCI-MSI-edge      ahci
 30:          1       3502   PCI-MSI-edge      i915
 31:          0       2894   PCI-MSI-edge      eth0
NMI:          0          0   Non-maskable interrupts
LOC:      46690      47341   Local timer interrupts
RES:      14957      15044   Rescheduling interrupts
CAL:         73         64   Function call interrupts
TLB:        193        119   TLB shootdowns
TRM:          0          0   Thermal event interrupts
THR:          0          0   Threshold APIC interrupts
SPU:          0          0   Spurious interrupts
ERR:          0
MIS:          0

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?

Abraços,
Gustavo