id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
254	Previous.dat misses data	Chuck McKinnis	pasha	"Ticket added by Roderick Klein.

In eCS 2.0 RC5 there will be a patched resource.sys. This resource.sys will look for previous.acp. Since it will never find this file, will do a full hardware detect.

We did this because with ACPI there is a bigger chance for IRQ's and other hardware resources to change when the system is rebooted. Next to that resource.sys tends to trap when attempting to read a corrupted previous.dat (there have been a few isolated cases on HPFS where this happened). Previous.dat gets written by a DLL loaded when the WPS gets loaded.

With ACPI not loaded on my T60, the output of PCIBUS.SNP is not included in previous.dat (see attached files).

With ACPI loaded this information is not there.

Whats the cause of this? 

Roderick Klein
"	defect	new	major	Release version 3.10	ACPI PSD	3.09