Bug 17062

Summary: PnP Interrupts don't appear in /proc/interrupts
Product: [Retired] Red Hat Linux Reporter: John William <jw2357>
Component: kernelAssignee: 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   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2000-08-29 21:41:54 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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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.