[CentOS] kernel message - disabling irq #50

[partha chowdhury]

On Sat, 2008-09-20 at 07:33 -0700, nate wrote:
> partha chowdhury wrote:
> 
> >> Sep 19 13:13:02 station2 kernel: irq 50: nobody cared (try booting
> > with the "irqpoll" option)
> 
> cat /proc/interrupts and see what it says(post output to the list
> if you want).
> 
> One thing to try, if something is sharing irq50 with another
> device, if that device is an expansion card then try moving
> that expansion card to another slot in the system.

here's the output :
 cat /proc/interrupts 
           CPU0       CPU1       
  0:       4925    1168343    IO-APIC-edge  timer
  1:         53        328    IO-APIC-edge  i8042
  8:          0          5    IO-APIC-edge  rtc
  9:          0          0   IO-APIC-level  acpi
 12:          0        105    IO-APIC-edge  i8042
 50:      98133       1867   IO-APIC-level  ehci_hcd:usb2
 58:          3      86294   IO-APIC-level  ohci_hcd:usb3, nvidia
 66:          0          0   IO-APIC-level  ohci_hcd:usb4
 74:       4188         77   IO-APIC-level  eth0
 82:      35474        110   IO-APIC-level  EMU10K1X
 90:       1696     111580         PCI-MSI  eth1
233:      11081       5907   IO-APIC-level  ehci_hcd:usb1, ahci
NMI:          0          0 
LOC:    1173125    1173126 
ERR:          1
MIS:          0

nothing is sharing irq50 so i am a little puzzled
> 
> For the system I am on for reference:
> 
> 
>            CPU0       CPU1       CPU2       CPU3
>   0:  349449438   97827289  129150703    1324419    IO-APIC-edge  timer
>   4:   22709754          0          0          0    IO-APIC-edge  serial
>   8:  572455673   15473535  564615318   27739670    IO-APIC-edge  rtc
>   9:          1          0          0          0   IO-APIC-level  acpi
>  15:      74017      49259   29528511          0    IO-APIC-edge  ide1
>  50:   13430140          0   12041824          0   IO-APIC-level  eth2
>  74:    7857068          0          0          0   IO-APIC-level  Intel
> 82801DB-ICH4
> 169:  142038093          0          0          0   IO-APIC-level 
> uhci_hcd:usb1, nvidia
> 177:    2719957          0          0          0   IO-APIC-level  uhci_hcd:usb2
> 185:          0          0          0          0   IO-APIC-level  uhci_hcd:usb3
> 193:      65184          0    4501500          0   IO-APIC-level 
> ehci_hcd:usb4, ohci_hcd:usb7
> 201:   13311819      94167   14802720     262062   IO-APIC-level  3w-xxxx
> 209:   19049441     916146   11652498     250590   IO-APIC-level  eth0
> 217:    1612506          0          0          0   IO-APIC-level  ehci_hcd:usb5
> 225:    3263237          0          0          0   IO-APIC-level  ohci_hcd:usb6
> 233:    1810468       3618      29330        424   IO-APIC-level  eth1
> NMI:          0          0          0          0
> LOC:  577787080  577787079  577787078  577787077
> ERR:          0
> MIS:          0
> 
> 
> Nothing sharing irq 50 on this machine, though irq 169 is being
> shared by both my Nvidia video card and a 4-port USB expansion
> card.
> 
> The kernel source code describes the error as this:
> 
>  * If 99,900 of the previous 100,000 interrupts have not been handled
>  * then assume that the IRQ is stuck in some manner. Drop a diagnostic
>  * and try to turn the IRQ off.
>  *
>  * (The other 100-of-100,000 interrupts may have been a correctly
>  *  functioning device sharing an IRQ with the failing one)
> 
> 
> So sounds hardware related. Whether it's the board itself
> or an add-in card I'm not sure. If possible remove all
> add-in cards that you can to see if the issue goes away.
> Also disable all devices in the BIOS that your not using
> (secondary IDE ports, serial ports, parallel ports etc), just
> to rule those out.
i have disabled the only ide port and parallel and serial port in the
bios. still i am getting the message.

.