[mythtv-users] Occasional hard freezes

[Jason Werpy]

On 10/29/05, Ryan Steffes <rbsteffes at gmail.com> wrote:
>
>
>
> On 10/28/05, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> >
> > Ryan Steffes wrote:
> >
> > >On 10/28/05, Julian Edwards <myth at julian-edwards.com> wrote:
> > >
> > >
> > >>Ryan Steffes wrote:
> > >>
> > >>>I thought I had finally gotten this fixed with the kernel option
> > >>>nolapic, but it happened to me again. I am experiencing hard lock ups
> > >>>that seem to be related to high data throughput, but aren't
> > consistent
> > >>>enough for me to track down. When it freezes, only hitting the reset
> > >>>or power button fixes it.
> > >>>
> > >>>I have an MSI K7N2 Delta 2 motherboard with an AMD Barton 2500+ in
> > >>>it. It has a nforce northbridge. I am passing the kernel "acpi=no
> > >>>noapic nolapic". I'm running 2.6.11-6mdk. I have one PVR 150. I have
> > >>>two hard drives, running LVM to make one video share. I'm running
> > >>>ivtv 0.3.9
> > >>>
> > >>>What happens is a hard lock up. It generally happens when I'm
> > >>>exercising the ethernet hard.
> > >>>
> > >>>
> > >>This exact same thing was happening to me too with my KT6 Delta.
> > >>
> > >>[snip]
> > >>
> > >>>Can anyone give any advice on where to go from here?
> > >>>
> > >>>
> > >>Sure. The problem is almost certainly to do with interrupt sharing. In
> > >>my case it was a problem with the ACPI steering assigning too many
> > >>devices the same IRQ. I ended up fixing it by disabling unnecessary
> > >>onboard hardware (eg I don't need 8 USB controllers or onboard sound),
> > >>using acpi=off (is that different to your acpi=no ?) and
> > re-positioning
> > >>
> > >According to proc/interrupts, there shouldn't be a sharing problem.
> > However,
> > >I'm unsure if there is a difference between acpi=no and acpi=off. I'll
> > try
> > >"off" and see if I can pound away on the NIC and the hard drive and see
> > what
> > >happens.
> > >
> > vi /usr/src/linux-`uname -r`/Documentation/kernel- parameters.txt
> >
> > /acpi
> >
> > acpi= [HW,ACPI] Advanced Configuration and Power Interface
> > Format: { force | off | ht | strict }
> > force -- enable ACPI if default was off
> > off -- disable ACPI if default was on
> > noirq -- do not use ACPI for IRQ routing
> > ht -- run only enough ACPI to enable Hyper Threading
> > strict -- Be less tolerant of platforms that
> > are not
> > strictly ACPI specification compliant.
> >
> > I think you were trying for "acpi=noirq noapic nolapic". And, it
> > wouldn't hurt to throw in a "pci=noacpi" for good measure. Most of the
> > 'net gets these parameters wrong, though, so I realize you saw someone
> > else recommend this...
> >
> > Note, also, that "acpi=off" would give you the same IRQ-related results
> > as "acpi=noirq" (and disable the rest of ACPI, also).
>
>
>
> Changing to acpi=off did not fix the problem. I'm a little concerned with
> whether it's really off though, it seems to turn on local apic before
> reading the kernel options:
>
> Oct 29 08:56:54 mythtv kernel: Found and enabled local APIC!
> Oct 29 08:56:54 mythtv kernel: Initializing CPU#0
> Oct 29 08:56:54 mythtv kernel: Kernel command line: auto BOOT_IMAGE=MythTV
> ro root=341 acpi=off noapic nolapic resume=/dev/hdb3 splash=silent
> Oct 29 08:56:54 mythtv kernel: bootsplash: silent mode.
>
> Later, it does say:
>
> Oct 29 08:56:54 mythtv kernel: PCI: PCI BIOS revision 2.10 entry at
> 0xfbe50, last bus=2
> Oct 29 08:56:54 mythtv kernel: PCI: Using configuration type 1
> Oct 29 08:56:54 mythtv kernel: mtrr: v2.0 (20020519)
> Oct 29 08:56:54 mythtv kernel: ACPI: Subsystem revision 20050211
> Oct 29 08:56:54 mythtv kernel: ACPI: Interpreter disabled.
> Oct 29 08:56:54 mythtv kernel: Linux Plug and Play Support v0.97 (c) Adam
> Belay
> Oct 29 08:56:54 mythtv kernel: pnp: PnP ACPI: disabled
> Oct 29 08:56:54 mythtv kernel: PnPBIOS: Disabled
> Oct 29 08:56:54 mythtv kernel: PCI: Probing PCI hardware
> Oct 29 08:56:54 mythtv kernel: PCI: Probing PCI hardware (bus 00)
> Oct 29 08:56:54 mythtv kernel: PCI: Using IRQ router default [10de/01e0]
> at 0000:00:00.0
>
> but it doesn't say anything about local apic again. How can I check that
> it's really disabled?
>
>
>
>
>
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>
>
You might also need the nolapci kernel parameter to turn off local apci, its
separate from the main apci kernel parameters.
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