Bug 17062

Summary:	PnP Interrupts don't appear in /proc/interrupts
Product:	[Retired] Red Hat Linux	Reporter:	John William <jw2357>
Component:	kernel	Assignee:	Michael K. Johnson <johnsonm>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	medium
Version:	6.2
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2000-08-29 21:41:54 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description John William 2000-08-29 01:13:14 UTC

Kernel 2.2.16. I have added an ISA PnP modem. It is configured 
as /dev/ttyS1 using IRQ3. However IRQ3 does not appear in /proc/interrupts.

Otherwise the device works fine.

Comment 1 Alan Cox 2000-08-29 21:41:51 UTC

Does it appear in /proc/interrupts while you have it open (eg while online) -if
so then its not a bug but a feature. Linux knows how to reuse the IRQ for other
things when not using that port.

Comment 2 John William 2000-09-01 01:40:20 UTC

Alan - you're right, it does appear in /proc/interrupts while the device is 
actually in use but not at other times.

I was confused because it doesn't appear in /etc/isapnp.gone either so unless 
the device is actually in use it's "assignment" to IRQ3 does not appear 
anywhere.