[OpenAFS] Weird conflict between openafs kernel module and nvidia driver on Ubuntu

[Charles Curley]

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On Thu, Nov 06, 2008 at 02:58:49PM -0800, Russ Allbery wrote:
> "Karl M. Davis" <Karl.Davis@ridgetopgroup.com> writes:
>=20
> > I just opened this bug on Launchpad last night:
> > https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-177/+=
bug/294527
> > =20
> > Screwy as hell, seems to me.
> > =20
> > Anyone have any ideas what might be up with it?
>=20
> The only thing I can think of is some sort of IRQ conflict between your
> video and your networking, although that's really a stretch.

Curiouser and curiouser.

I take it everything worked fine under Ubuntu 8.04. If so, then I
doubt it's any bios setting.

8.04 uses the 2.6.24 kernel, 8.10 the 2.6.27. Unless there's been a
regression, I wouldn't think the new kernel would cause a problem. The
kernel has been perfectly capable of managing interrupts.

The PCI spec requires the OS to chain interrupts so that multiple
devices and their drivers can share an interrupt. And Linux has been
doing that correctly for years. So there's no real reason to require
that they be on separate IRQs.

Have you tried removing the nvidia driver completely and running the
AFS module? Anything interesting in /proc/interrupts?

--=20

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