SUMMARY: Ultra10: interrupt level 4 not serviced

From: Jacques-Olivier Haenni (
Date: Tue Apr 13 1999 - 13:06:10 CDT


My original question was:

Jacques-Olivier Haenni wrote:
> I've recently bought 2 sun Ultra10, and I have installed the exactly
> same software (Solaris 2.6, same patches,...) on them as I did on a
> Ultra10 I bought one year ago.
> The 1-year-old Ultra10 works fine, but the new ones sometimes put the
> following message in the log file:
> Apr 12 14:36:27 my_machine unix: WARNING: interrupt level 4 not serviced
> Does anybody know the meaning of that message ?
> Can I get rid off it ?

This problem had already been treated in the mailing list a few months
ago. The message subject was "Warnings in messages". Although I had
searched the archive, I hadn't found this message, sorry...

A few people told that the warning was a SCSI warning. I don't think it
is, because Ultra10 doesn't have SCSI.

Someone wrote about a bug in Solaris 2.6 with the PCI drivers. This
seems to be the right explanation in my case.

This warning message is harmless and can be ignored.

There is no patch for Solaris 2.6, but the problem is (?) solved in
Solaris 7.

But a question remains open: why didn't I have warnings with the Ultra10
I bought one year ago...

Thanks to all of you who answered me, and particularly to:

- James Neal
- Tim Ambrose
- Mr Rene Occelli
- Mark Neill
- Nicci Tynen
- Justin Stringfellow
- Dave Foster


     Jacques-Olivier Haenni  

Logic Systems Laboratory | Swiss Federal Institute of Technology (EPFL) | Tel: (+41 21) 693 66 30 1015 Lausanne - Switzerland | Fax: (+41 21) 693 37 05

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