Bug 7089

Summary:	ACPI: Looking for DSDT ... not found! - ASUS M2NPV-VM
Product:	ACPI	Reporter:	Gerald Britton (gerald.britton)
Component:	Config-Tables	Assignee:	acpi_other
Status:	REJECTED INVALID
Severity:	normal	CC:	acpi-bugzilla
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.15.26	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	output of command dmeseg -64000 acpidump output kernel config

Description Gerald Britton 2006-08-31 10:59:31 UTC

Most recent kernel where this bug did not occur: unknown
Distribution: ubuntu lts 6.06
Hardware Environment: ASUS M2NPV-VM mainboard with AMD-64 X2 CPU
Software Environment: ubuntu
Problem Description: during startup, this message appears:

ACPI: Looking for DSDT ... not found!


Steps to reproduce: boot the system, watch the kernel messages

Comment 1 Len Brown 2006-08-31 11:08:45 UTC

This is reported against 2.6.15.stable.  
Is it possible to test someting more recent, 
such as 2.6.17.stable, or ideally 2.6.18? 
  
please attach the complete output from dmesg -s64000  
please attach the .config used to build the kernel.  
please attach the output from acpidump, a utility  
that is available in the latest pmtools here:  
http://ftp.kernel.org/pub/linux/kernel/people/lenb/acpi/utils/

Comment 2 Gerald Britton 2006-08-31 11:14:37 UTC

Created attachment 8922 [details]
output of command dmeseg -64000

Comment 3 Gerald Britton 2006-08-31 11:17:45 UTC

*** Bug 7090 has been marked as a duplicate of this bug. ***

Comment 4 Gerald Britton 2006-08-31 11:45:18 UTC

Created attachment 8923 [details]
acpidump output

Comment 5 Gerald Britton 2006-08-31 11:59:18 UTC

Created attachment 8924 [details]
kernel config

Comment 6 Len Brown 2006-08-31 12:28:52 UTC

> ACPI: Looking for DSDT ... not found! 
 
This message is not in the kernel.org kernel source tree, either 
as of 2.6.15, or as of 2.6.18.  While your system seems to have 
plenty of other problems, ACPI did find the DSDT and it is running 
normally. 
 
I expect this message comes from the "initrd DSDT override patch" 
that some distributions, such as SuSE and Ubuntu tend to add to 
the kernel as their "value add" -- complain to them.

Comment 7 Robert Moore 2006-08-31 12:33:07 UTC

I could not find this message either.

A very odd (and invalid) FACS on this machine, however:

FACS @ 0x3def0000
  0000: 46 41 43 53 40 00 00 00 00 00 00 00 00 00 00 00  FACS@...........
  0010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................

No global lock, no firmware waking vector. This may cause ACPICA problems. 
Again, the issue of "how much validation do we perform on the tables" arises.

Comment 8 Robert Moore 2006-08-31 13:36:12 UTC

Looks like the FACS is OK after all. Global Lock is in fact optional. Other 
fields are OK at zero.