Adding a PCI TV Tuner

TheORlyFactor · 01-30-2009, 02:19 PM

Hello,

I am trying to install a Hauppauge PVR-150 into my CentOS 5 machine. When the card is installed, I get the error "Disabling IRQ #5" upon startup, and the machine loses networking. Does anyone know why I'm receiving this error?

Pearlseattle · 02-03-2009, 01:01 PM

As far as I know the bios contains a setting called "Plug and Play" (or "P&P") which can be set to "yes" or "no".
Normally with Windows it is set to "yes", therefore Windows takes care of configuring the IRQs.
With Linux it used to have to be set to "no" as Linux wasn't able to assign IRQs upon starup. Setting it to "no" would leave the responsability to the BIOS of your PC to set them so that no conflicts occur.

I don't know if this is still valid, but you could try this out - go to your BIOS and doublecheck that setting eventually changing it - it won't hurt as you can change it back anytime.

jstephens84 · 02-03-2009, 03:01 PM

If your motherboard has a onboard video try disabling that also as some of the buses will share IRQ's.

TheORlyFactor · 02-04-2009, 09:49 PM

Quote:

Originally Posted by Pearlseattle

As far as I know the bios contains a setting called "Plug and Play" (or "P&P") which can be set to "yes" or "no".

There is a setting in my bios called "Plug and Play Aware OS", and that is set to No. The problem still persists.

Pearlseattle · 02-05-2009, 12:50 PM

Hmm, that's a pity.
Is the warning message "Disabling IRQ #5" displayed by the BIOS when the machine boots, or afterwars when Linux starts loading?
What do you get when issuing the command "cat /proc/interrupts"?
E.g. in my case:

Code:

cat /proc/interrupts 
           CPU0       CPU1       
  0:     359321     360029   IO-APIC-edge      timer
  1:       1348       1283   IO-APIC-edge      i8042
  9:        103         99   IO-APIC-fasteoi   acpi
 12:     123409     123577   IO-APIC-edge      i8042
 14:         20         24   IO-APIC-edge      ide0
 16:       9138       9172   IO-APIC-fasteoi   uhci_hcd:usb3, nvidia
 17:       4452       4465   IO-APIC-fasteoi   uhci_hcd:usb4, HDA Intel
 18:          1          1   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb7, yenta
 19:          3          4   IO-APIC-fasteoi   yenta, ide1
 20:          1          1   IO-APIC-fasteoi   ehci_hcd:usb2, uhci_hcd:usb5, ohci1394
 22:          0          0   IO-APIC-fasteoi   uhci_hcd:usb6
505:     125405     124593   PCI-MSI-edge      iwlagn
507:      11875      11792   PCI-MSI-edge      ahci
NMI:          0          0   Non-maskable interrupts
LOC:     224596     270945   Local timer interrupts
RES:     133927     137023   Rescheduling interrupts
CAL:        286        180   Function call interrupts
TLB:       1769       1707   TLB shootdowns
TRM:          0          0   Thermal event interrupts
THR:          0          0   Threshold APIC interrupts
SPU:          0          0   Spurious interrupts
ERR:          0
MIS:          0

TheORlyFactor · 02-08-2009, 12:57 PM

Quote:

Originally Posted by Pearlseattle

Is the warning message "Disabling IRQ #5" displayed by the BIOS when the machine boots, or afterwars when Linux starts loading?

The warning message appears when Linux starts loading, specifically when the system attempts to bring up eth1.

cat /proc/interrupts output without the card in the system: (as far as I can remember, its about the same when the card is in the system.)

Code:

[root@netfinity ~]# cat /proc/interrupts
           CPU0       CPU1
  0:    3135433    3256166    IO-APIC-edge  timer
  1:          4          5    IO-APIC-edge  i8042
  2:          0          0          XT-PIC  cascade
  5:       3867         77   IO-APIC-level  eth1
  6:          3          3    IO-APIC-edge  floppy
  8:          1          0    IO-APIC-edge  rtc
 11:      16965       1795   IO-APIC-level  aic7xxx
 12:         90         24    IO-APIC-edge  i8042
 15:      59434        250    IO-APIC-edge  ide1
NMI:          0          0
LOC:    6391694    6391704
ERR:          0
MIS:          0

mesiol · 02-08-2009, 01:17 PM

Hi,

take a look at the following boot parameters for your kernel:

pci=routeirq

and

pci=biosirq

possibly one of the will help.

TheORlyFactor · 02-15-2009, 11:43 AM

Quote:

Originally Posted by mesiol

Hi,

take a look at the following boot parameters for your kernel:

pci=routeirq

and

pci=biosirq

possibly one of the will help.

Tried both of them, still getting the same "Disabling IRQ #5" error at startup.

lazlow · 02-15-2009, 02:08 PM

You might try shuffling around your cards. On a lot of older motherboards the irqs were limited to only certain slots. Such as: Card A can use irq 2 or 5, Card B can use 2 or 7, but pci slots five and two can only use irq 2 and 6(numbers are not actual just pulled out of air). In the described case an irq conflict would arise since only irq 2 was available (in those slots) and both A and B wanted the same (available) irq.

Electro · 02-15-2009, 02:19 PM

I agree with lazlow. Try shuffle the cards around. If it still gives you the same error, it could mean that card is not compatible with your present hardware.

TheORlyFactor · 02-16-2009, 10:40 AM

Quote:

Originally Posted by Electro

I agree with lazlow. Try shuffle the cards around. If it still gives you the same error, it could mean that card is not compatible with your present hardware.

Hmm well I'm unable to shuffle my PCI cards around, but what I can do is try moving networking from eth1 to eth0, and see if that helps at all.

Electro · 02-16-2009, 02:04 PM

The device node eth0...255 is software designation for your NIC and it is not really hardware. Setting the NIC from eth0 to eth1 will not fix anything. Your problem is hardware related. Something is not compatible. It seems Hauppauge PVR-150 is not compatible with your computer since that is the only expansion or add-on card. You can use either SiliconDust HDHomeRun, a network ATSC/QAM tuner, or Hauppauge HD PVR, USB HD/SD encoder. Another way is turn on ACPI in the BIOS. This will extend the amount of IRQ, but it may create more problems.

If you insist on using the PVR-150 card, turn off communication ports in the BIOS. If you are not using USB, turn off that too. More IRQ can be given up by disabling the floppy controller.

TheORlyFactor · 02-17-2009, 02:10 PM

I've tried all sorts of things in BIOS, turning things on, turning things off, changing all sorts of PnP settings, and none of them have helped. I did notice though that the ifconfig command has some sort of option for reassigning the IRQ number of the NIC...would messing around with that help at all?

lazlow · 02-17-2009, 05:34 PM

Why is it exactly that you cannot shuffle some cards around?

TheORlyFactor · 02-18-2009, 02:51 PM

Quote:

Originally Posted by lazlow

Why is it exactly that you cannot shuffle some cards around?

I only have two PCI slots in this machine. It's a 1U Rackmount server. Adding or removing any PCI cards from the box is a major pain in the ass because of this, plus the card that currently resides in one of the PCI slots is my SCSI adapter, so I don't want to risk damage to it or damage to my harddisks if something is to go wrong.