I'm not exactly sure what your trying accomplish, towards that end, try this and see if it gets you closer.
open a terminal
cd into a directory(folder)that you can test in
type dmesg | grep ACPI >acpi.txt
What has happened is we have scanned the dmesg log for any ACPI lines and written them into acpi.txt.
From there you can open with your favorite editor or just type cat acpi.txt to see whats in there.
There are lots of tools, awk, sed come to mind that may do more of what you need.
If you could explain in a bit more detail please?