2.4.21-rc7 hang on boot after spurious 8259A interrupt: IRQ15.

Michael Frank (mflt1@micrologica.com.hk)
Fri, 13 Jun 2003 11:36:36 +0800


Doing swsusp testing in endless loop. On a P4/2.4G (ACPI=off)
on 192nd boot:

spurious 8259A interrupt: IRQ15.
Calibrating delay loop...

hang

Hit Reset and it rebooted OK

This is the first spurious 8259A interrupt: IRQ15 seen.

I see spurious 8259A interrupt: IRQ7 quite frequently on
varying hardware on both 2.4 and 2.5.

By design, the 8259A delivers a vector 7 when the IRQ
line is deasserted before the IRQ is serviced. This
applies to both edge and level trigger modes. A floating
"wire" or crapy chipset can pickup noise, but the driver
should handle it.

No problems seen with mainboard/cpu/ram in three months.
I dont' think it is HW, but it could be.

Also, spurious 8259A interrupts are quite recent, could
something be wrong with recent 8259A driver?

Regards
Michael

I am not subscribed, pls cc me

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My current linux related activities in rough order of priority: - Testing of 2.4/2.5 kernel interactivity - Testing of Swsusp for 2.4 - Testing of Opera 7.11 emphasizing interactivity - Research of NFS i/o errors during transfer 2.4>2.5 - Learning 2.5 series kernel debugging with kgdb - it's in the -mm tree - Studying 2.5 series serial and ide drivers, ACPI, S3 * Input and feedback is always welcome *

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