Re: problem with sound (esound) since a few days

[Uwe Dippel <udippel@uniten.edu.my>]

On Thu, 28 Oct 2004 13:50:09 +0200, Uwe Dippel wrote:

> Though I didn't change anything on purpose; just the usual upgrades, I
> lost my sound a few days ago.

> Finally, the lspci -v gives me:
> 
> 0000:00:1f.5 Multimedia audio controller:
> Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller
> (rev 01)
>         Subsystem: Dell: Unknown device 0139
>         Flags: bus master, medium devsel, latency 0, IRQ 7 I/O ports at
>         d800 [size=256]
>         I/O ports at dc40 [size=64]
>         Memory at faeff800 (32-bit, non-prefetchable) [size=512] Memory at
>         faeff400 (32-bit, non-prefetchable) [size=256] Capabilities: [50]
>         Power Management version 2

Firstly, thanks to all of your helpful advices in this friendly community !

The problem is 'solved'. To me it's no solution, since - as I wrote in the
OP - I hadn't done any changes. Running for months and just apt-get
update / upgrade. And then it *must not* break on Sarge.

This is what I found in dmesg:

 ACPI: PCI interrupt 0000:00:1f.5[B] -> GSI 7 (level, low) -> IRQ 7
 unable to grab IRQ 7
 Intel ICH: probe of 0000:00:1f.5 failed with error -16

And /proc/interrupts were identical; showing IRQ 7 to be occupied by
LPT0:, contrary to what lspci makes me believe.

I rebooted and disabled the Parallel Port at reboot and now everything is
back to normal. Better said: 'normal'; because there is no inherent
necessity to load the audio controller to IRQ7; and neither does it
complain; I ask you to read the dmesg properly: ACPI has its problems with
it.
This is how it looks when working properly:

ACPI: PCI interrupt 0000:00:1f.5[B] -> GSI 7 (level, low) -> IRQ 7

 0:   66676279          XT-PIC  timer
  1:         22          XT-PIC  i8042
  2:          0          XT-PIC  cascade
  7:     170589          XT-PIC  Intel 82801DB-ICH4, Intel 82801DB-ICH4 Modem
  8:          4          XT-PIC  rtc
  9:          0          XT-PIC  acpi
 11:    9023557          XT-PIC  eth0, ehci_hcd, uhci_hcd, uhci_hcd, uhci_hcd, y
enta, yenta, ohci1394
 12:         58          XT-PIC  i8042
 14:     182138          XT-PIC  ide0

Since I don't need the local LPT0:, I shall leave this 'solution' in place.
But someone else might hit this bug / trap elsewhere; so beware !


Thanks again,

Uwe