[mythtv-users] OT: kernel disabling IRQ#7 (Sound Stops working)

Adam Gianola devils.taco at gmail.com
Mon Jul 11 21:28:50 EDT 2005

I also had a similar problem, however my pvr250 was the one taking up
irq7, so when it got switched off I lost my tv capture :(   i'm not
exactly sure how i fixed the problem, but I do see 'pci=useirqmask'
and 'acpi=off' in my grub.conf.  I think dmesg told me to do the
pci=useirqmask thing because the irq7 was screaming all the time for
no reason... at least i think thats why i put it there. whatever i
did, i still see ivtv on irq7 and haven't had a problem for ages.


On 7/11/05, Niklas Brunlid <nbr at ticalc.org> wrote:
> On Mon, 11 Jul 2005, Noel Murphy wrote:
> > Hello,
> >
> > I realize this isn't mythtv specific, however it is happening on my box which
> > is used specifically for mythtv.
> >
> > I have a weird issue where when I don't use the machine for awhile (say the
> > whole weekend because I'm gone to the cottage) when I return, I have a
> > Knotify message up on the screen telling me that the kernel has disabled IRQ
> > #7 (Which I believe is the interrupt for the sound card). Then, when I try to
> > watch any recordings or live tv, I get no sound.
> >
> > A reboot always fixes the problem (until the following weekend when I go away
> > again).
> >
> > Anyone know why this is happening????
> I remember doing battle with this issue when I switched my frontend to
> FC3 from gentoo. Now I have put everything into the master backend
> (PVR350, PVR500MCE) and it has appeared again, and obviously rebooting
> every time it happens is not an option for a general server/master
> backend.
> The frontend was an Asus Pundit (SiS chipset) and the server is some
> generic Intel mainboard with a P4, so this may not work there, but I think
> I "solved" it last time by
>   1) Disabling the printer port in BIOS, and
>   2) Adding "parport=0 noapic nolapic acpi=off" to the kernel line in grub.conf.
> Can't remember if that was what actually did the trick, will check when I
> get home tomorrow... =)
> / Niklas
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