"Wild Interrupt" / Soundblaster problem

"Wild Interrupt" / Soundblaster problem

Post by Walter Doe » Tue, 22 Jun 1993 06:48:16



Hello!

I am running 0.99pl9 and encounter the message "Wild Interrupt? (IRQ7)"
during the boot sequence.

What does this message mean? Does it indicate a hardware problem?
I have removed all boards that are jumpered to generate IRQ7 (LPT, SB)
but the message persists.

I used to ignore the message, but now I am having problems with the
kernel sounddriver (Ver 1.0b / SB 1.0 set to IRQ7).

"cat file.au > /dev/audio" will not play the whole file but rather short
"pieces" which vary everytime I execute the command.

Could this problem be related to the "Wild Interrupt" message I get at boot
time?

Ideas anyone?

-Walter

--

              "The poor folks who only have 100MBytes of RAM five years
from now may not be able to buffer a 16MB packet, but that's their
tough luck."              (John Gilmore on Mon, 10 Oct 88 18:10:21 PDT)

 
 
 

1. "Wild Interrupt" / Soundblaster problem


   Date: 20 Jun 93 21:48:16 GMT

   I am running 0.99pl9 and encounter the message "Wild Interrupt? (IRQ7)"
   during the boot sequence.

   What does this message mean? Does it indicate a hardware problem?
   I have removed all boards that are jumpered to generate IRQ7 (LPT, SB)
   but the message persists.

This message means that you have a cheap motherboard, and somewhere,
some RF-generated interference occasionally causes one of your interrupt
lines on your bus to float for a microsecond.  The interrupt controller
on your motherboard sensed the this, but the interrupt was asserted for
such a small amount of time that it was not able to determine which line
caused it, and so it generated an interrupt of 7 in absence of any
better information.  This is apparently documented in the datasheet for
the interrupt controller.

                                                - Ted

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