On 6/20/07, Ian C. Blenke <icblenke@nks.net> wrote:
> Mario Lombardo wrote:
>
> > I have a machine that currently runs the 2.6.19-1.2288 kernel just
> > fine, but when I try to run the latest stock kernel, it doesn't get
> > past this:
> >
> > ide: failed opcode was: unknown
> > ide0: reset: success
> > had: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest }
> >
> > This repeats several times and doesn't seem to stop. As a result, my
> > computer won't boot from the CF card boot partition, which is
> > /dev/hda1. This only happens with 2.6.20 kernels and newer.
> >
> > Aside from recompiling the kernel, what else should I try? I'm
> > thinking I should pass arguments to the kernel from grub, or helping
> > the kernel with an equipped init ramdisk (initrd)? I'm not sure where
> > to start or what exactly to do though. I'm not even sure what could
> > be missing that's in the 2.6.19 kernel. Lost here :(
>
>
> Sounds like an IRQ issue. Try booting with:
>
> noapic
> - No APIC (Advanced PIC, needed for SMP)
> nolapic
> - No local PIC
> acpi=noirq
> - Don't learn IRQ routing from ACPI
> acpi=off
> - Disable ACPI altogether
> irqpoll
> - Use IRQ polling
>
> There are also a number of other fun knobs you also learn to fiddle with
> to get clock timing to work correctly sometimes:
>
> notsc
> clock=pmtmr
> noapictimer
>
> Honestly, the first thing I would try is booting with "acpi=off" and see
> if that magically "fixes" things. If not, _then_ try "noapic nolapic"
> and see if that fixes it. If not, then try adding "irqpoll" and see if
> that helps. If not, you're in for some fun.
>
> The only other thing that comes to mind is "irq unmasking", ala "hdparm
> -u 1", which shouldn't be enabled by default, but can greatly decrease
> the system overhead of PATA devices on most IDE controllers (but is
> horribly broken on older ones, causing IRQ issues like what you might be
> seeing).
>
> This IRQ routing madness with Linux drives me nuts. It's highly
> motherboard and processor dependant, and makes deploying and managing a
> farm of commodity PCs interesting to say the least.
>
> - Ian C. Blenke <ian@blenke.com> <icblenke@nks.net>
>
> -----------------------------------------------------------------------
I'll try that. I guess I'll append the option(?) at the end of the
grub line that has the kernel listed? I would love ACPI if it worked
flawlessly on FC5. Perhaps I should try FC6 though. I use "acpitool
-S" quite often. I may have the syntax wrong there. Anyway, it
allows me to suspend the system, but then I lose audio when it
resumes. Weird but I still love the outweighing benefits.
/mario
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