Bug 4834

Summary:	detecing acpi support in bios by using dmidecode app
Product:	ACPI	Reporter:	Nadav Kavalerchik (nadavkav)
Component:	BIOS	Assignee:	acpi_bios
Status:	CLOSED PATCH_ALREADY_AVAILABLE
Severity:	low	CC:	acpi-bugzilla
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.x	Subsystem:
Regression:	---	Bisected commit-id:

Description Nadav Kavalerchik 2005-07-02 11:12:23 UTC

Distribution: Fedora Rawhide 
Hardware Environment: i386 pIII 450 
Software Environment: kernel 2.6.12 
Problem Description: 
 
how about trying to detect acpi bios support like dmidecode application does ? 
( and not use acpi=force/noacpi params ) 
 
link: http://www.nongnu.org/dmidecode/ 
 
Steps to reproduce: 
booting kernel

Comment 1 Len Brown 2005-08-14 23:03:32 UTC

This is what we do today -- see
drivers/acpi/blacklist.c: blacklist_by_year().
"acpi=force" is to over-ride what we learn from DMI.
Of couse, you can build without CONFIG_ACPI_BLACKLIST_YEAR
if you don't want Linux to check a cutoff year.

Please re-open if I mis-understood your suggestion.

Comment 2 Nadav Kavalerchik 2005-08-15 02:03:52 UTC

now i understand, thanks. (leave it closed) 
 
I'm using fedora kernel rpms so i can't turn off this backlist define. 
i was also surprised to see (in the acpi.c code) my machines id intel bx440 as backlisted 
while the bios supports acpi and apm both ! and i'm using it too.