Re: ACPI hangs X-Windows with nForce chipset

Hi Arndt,
First of all, thanx for such a prompt reply.  With
2.4.20 and acpi-20021212 patch, the system works with
APIC disabled from BIOS!  X-Windows and KDE is stable.
 My system was already stable in text-mode (run level
3).The errors which i obtained before are still
there:-

pci_bind-0191 [05] acpi_pci_bind         : Device
00:00:04.00 not present in PCI namespace
(Anyone know what the above means?!)

and a series of AE_AML_BUFFER_LIMIT conditions.
(Is there anyway to increase the 8 * (HOST BUFFER
size) from 48 to 56?, and will that solve the
problem?)

It seems that the problem is when IO-APIC is used for
IRQ routing.  I greped /usr/src/linux*/drivers/acpi
for AE_AML_BUFFER_LIMIT, and  it seems (from
dispatcher/dsopcode.c, line 496, in function
Acpi_ds_init_buffer_field(...):-

The Host buffer length, buffer_desc->buffer.length =
6, and if it was 7, it should work.(in my case)
Is it possible to increase that buffer, something
tells me it isn't as simple as :-

buffer_desc->buffer.length = 7;         :)

Please understand that i know nothing about what i am
talking about here, so anyone reading this should have
a high stupidity tolerance! Please help if there is an

easy fix to the above.

James Joseph

--- Arndt Schoenewald

[off-list ref] wrote:

Hi James,

does your system work without APIC and IO-APIC
support enabled in the
kernel, or with APIC support being turned off in the
BIOS?

(I have a SiS650 based machine with a MS-6335E
mainboard which will
only boot with either one of the above workarounds.
It seems that the
support for APICs and/or IO-APICs is still not 100%
bugfree.)

The "Spurious 8259A interrupt : IRQ7" messages
appear on many machines,
but seem to be harmless. I don't know what causes
them.

Good luck,
Arndt

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