Comment 11 for bug 254668

[ 0.000000] ACPI: DSDT 7BF5C167, 87DF (r1 NVIDIA MCP67 6040000 MSFT 3000000)

[ 0.448028] ACPI: Core revision 20080321
[ 0.450665] ACPI: Looking for DSDT in initramfs... successfully read 34783 bytes from /DSDT.aml.
[ 0.450826] ACPI: Override [DSDT- MCP67], this is unsafe: tainting kernel
[ 0.450893] ACPI: Table DSDT replaced by host OS
[ 0.451042] ACPI: DSDT 00000000, 87DF (r1 NVIDIA MCP67 6040000 MSFT 3000000)
[ 0.451205] ACPI: DSDT override uses original SSDTs unless "acpi_no_auto_ssdt"
[ 0.456028] ENABLING IO-APIC IRQs

[ 0.584031] Setting up standard PCI resources
[ 0.584683] ACPI: EC: Look up EC in DSDT
[ 0.586820] ACPI: BIOS _OSI(Linux) query ignored via DMI
[ 0.587522] ACPI: Interpreter enabled
[ 0.587583] ACPI: (supports S0 S3 S4 S5)
[ 0.587828] ACPI: Using IOAPIC for interrupt routing
[ 0.588053] ACPI: EC: non-query interrupt received, switching to interrupt mode

pause till I hit power

I don't quite understand the wording of "DSDT override uses original SSDTs unless "acpi_no_auto_ssdt" so I tried it:

[ 0.450665] ACPI: Looking for DSDT in initramfs... successfully read 34783 bytes from /DSDT.aml.
[ 0.450826] ACPI: Override [DSDT- MCP67], this is unsafe: tainting kernel
[ 0.450893] ACPI: Table DSDT replaced by host OS
[ 0.451042] ACPI: DSDT 00000000, 87DF (r1 NVIDIA MCP67 6040000 MSFT 3000000)
[ 0.452028] ACPI: SSDT ignored due to "acpi_no_auto_ssdt"

and still waits at
[ 0.588165] ACPI: EC: non-query interrupt received, switching to interrupt mode