Howdy List,

In doing some googling to get Debian setup on a Dell Inspiron 1501 I
found some people had better success with the contrast/brightness
function keys if they downgraded the bios to an older version. So, I
tried this but Debian started hanging with an error message about
"unexpected irq trap at vector XX". I then upgraded back to the bios
version that came with the laptop, but the unexpected irq trap persists.

To make matters worse, the Debian Etch installer hangs with the same
error as well now (but different vector, if that means anything).
Knoppix, however, still boots just fine.

I have tried adding "noapic nolapic" to the boot options. That seems to
the installer boot eventually, though it still pauses for a long
time working on the error. Debian on the hard drive still will not boot
though, because it can not get root mounted after the unexpected irq
trap.

Does anyone have any other thoughts or suggestions for how I can fix
this?

TIA,
Jacob

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On Sat, Jun 16, 2007 at 12:53:11PM -0500, Jacob S. wrote:
> Howdy List,
>
> In doing some googling to get Debian setup on a Dell Inspiron 1501 I
> found some people had better success with the contrast/brightness
> function keys if they downgraded the bios to an older version. So, I
> tried this but Debian started hanging with an error message about
> "unexpected irq trap at vector XX". I then upgraded back to the bios
> version that came with the laptop, but the unexpected irq trap persists.
>
> To make matters worse, the Debian Etch installer hangs with the same
> error as well now (but different vector, if that means anything).
> Knoppix, however, still boots just fine.
>
> I have tried adding "noapic nolapic" to the boot options. That seems to
> the installer boot eventually, though it still pauses for a long
> time working on the error. Debian on the hard drive still will not boot
> though, because it can not get root mounted after the unexpected irq
> trap.

When I did a google search for "unexpected irq trap at vector", the hits
suggests that this is ACPI related, not APIC ...

So perhaps booting with "acpi=off" will make some headway?

There are some other acpi-related parameters too you might want to play
with...

Hope this s

--
Karl E. Jorgensen
karl@jorgensen.org.uk http://www.jorgensen.org.uk/
karl@jorgensen.com http://karl.jorgensen.com
==== Today's fortune:
Pohl's law:
Nothing is so good that somebody, somewhere, will not hate it.

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(quote)
I then upgraded back to the bios version that came with the laptop, but the unexpected irq trap persists.
(end quote)

Did you enter the BIOS setup and ensure that everything was set back the same as before? A BIOS update may 'update' the actual settings to some default state.


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On Tue, 19 Jun 2007 14:05:45 +0200 (CEST)
pinniped <cirilo_bernardo@yahoo.com> wrote:


>
> (quote)
> I then upgraded back to the bios version that came with the laptop,
> but the unexpected irq trap persists. (end quote)
>
> Did you enter the BIOS setup and ensure that everything was set back
> the same as before? A BIOS update may 'update' the actual settings to
> some default state.


Yes, but since I never changed anything in the BIOS setup before
installing Linux, I am not sure I would notice any changes.

Thanks,
Jacob
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On Tue, 19 Jun 2007 10:51:23 +0100
"Karl E. Jorgensen" <karl@jorgensen.org.uk> wrote:


> On Sat, Jun 16, 2007 at 12:53:11PM -0500, Jacob S. wrote:

> > Howdy List,
> >
> > In doing some googling to get Debian setup on a Dell Inspiron 1501 I
> > found some people had better success with the contrast/brightness
> > function keys if they downgraded the bios to an older version. So, I
> > tried this but Debian started hanging with an error message about
> > "unexpected irq trap at vector XX". I then upgraded back to the bios
> > version that came with the laptop, but the unexpected irq trap
> > persists.
> >
> > To make matters worse, the Debian Etch installer hangs with the same
> > error as well now (but different vector, if that means anything).
> > Knoppix, however, still boots just fine.
> >
> > I have tried adding "noapic nolapic" to the boot options. That
> > seems to the installer boot eventually, though it still pauses
> > for a long time working on the error. Debian on the hard drive
> > still will not boot though, because it can not get root mounted
> > after the unexpected irq trap.

>
> When I did a google search for "unexpected irq trap at vector", the
> hits suggests that this is ACPI related, not APIC ...
>
> So perhaps booting with "acpi=off" will make some headway?
>
> There are some other acpi-related parameters too you might want to
> play with...


Good thought, but "acpi=off" did not make any (noticeable) difference.
It still hung during boot with an unexpected irq trap.

Thanks,
Jacob
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On Tue, Jun 19, 2007 at 06:49:41PM -0500, Jacob S wrote:
>
> Good thought, but "acpi=off" did not make any (noticeable) difference.
> It still hung during boot with an unexpected irq trap.

some googling turned up this:

http://www.mepis.org/node/10972

which mentions turning off a bunch of crap in the BIOS (onboard modem etc).I suspect
that's where you need to go. Also pulling pci bus cards off the
machine and booting, then putting in one at a time to see if you can
find the problem.

A


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On Tue, 19 Jun 2007 17:34:43 -0700
Andrew Sackville-West <andrew@farwestbilliards.com> wrote:


> On Tue, Jun 19, 2007 at 06:49:41PM -0500, Jacob S wrote:

> >
> > Good thought, but "acpi=off" did not make any (noticeable)
> > difference. It still hung during boot with an unexpected irq trap.

>
> some googling turned up this:
>
> http://www.mepis.org/node/10972
>
> which mentions turning off a bunch of crap in the BIOS (onboard modem
> etc). I suspect that's where you need to go. Also pulling pci bus
> cards off the machine and booting, then putting in one at a time to
> see if you can find the problem.


Thanks for the tip. I turned off everything the BIOS will let me turn
off... USB, lan, wifi, modem, etc. and it still had the irq trap during
boot. There are not really any "settings" it will let me tweak, as far
as bus speeds or anything other than disabling peripherals, since this
is a laptop.

Anyone else have any suggestions?

Puzzled and confused,
Jacob
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Jacob S <stormspotter@6Texans.net>:
>
> On Tue, 19 Jun 2007 17:34:43 -0700
> Andrew Sackville-West <andrew@farwestbilliards.com> wrote:
>
> > On Tue, Jun 19, 2007 at 06:49:41PM -0500, Jacob S wrote:
> > >
> > > Good thought, but "acpi=off" did not make any (noticeable)
> > > difference. It still hung during boot with an unexpected irq trap.
> >
> > some googling turned up this:
> >
> > http://www.mepis.org/node/10972
>
> Thanks for the tip. I turned off everything the BIOS will let me turn
> off... USB, lan, wifi, modem, etc. and it still had the irq trap during

A shot in the dark from /var/log/messages:

If a device doesn't work, try "pci=routeirq". If it s, post a
report


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On Fri, 22 Jun 2007 00:47:04 GMT
"s. keeling" <keeling@spots.ab.ca> wrote:


> Jacob S <stormspotter@6Texans.net>:

> >
> > On Tue, 19 Jun 2007 17:34:43 -0700
> > Andrew Sackville-West <andrew@farwestbilliards.com> wrote:
> >

> > > On Tue, Jun 19, 2007 at 06:49:41PM -0500, Jacob S wrote:
> > > >
> > > > Good thought, but "acpi=off" did not make any (noticeable)
> > > > difference. It still hung during boot with an unexpected irq
> > > > trap.
> > >
> > > some googling turned up this:
> > >
> > > http://www.mepis.org/node/10972

> >
> > Thanks for the tip. I turned off everything the BIOS will let me
> > turn off... USB, lan, wifi, modem, etc. and it still had the irq
> > trap during

>
> A shot in the dark from /var/log/messages:
>
> If a device doesn't work, try "pci=routeirq". If it s, post a
> report


Nope. :-( A few of these things have changed which vector the irq trap
occurs in, but none have eliminated the error. Even with all the
options combined, it still hangs on an unexpected irq trap.

Thanks again,
Jacob
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Try booting with kernel parameter: noirqdebug

Also try the kernel paramater: debug
(this should show what exactly is at irq vector XXX)

Zach


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Sorry I meant "noirq" is one kernel paramater and the other is "debug" :-)

Zach

On 6/23/07, Zach <netrek@gmail.com> wrote:
> Try booting with kernel parameter: noirqdebug
>
> Also try the kernel paramater: debug
> (this should show what exactly is at irq vector XXX)
>
> Zach
>


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