Re: ahci_softreset prevents acpi_power_off

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Robert Hancock wrote:
Faik Uygur wrote:
What happens when you try to shutdown?

Does not shutdown and freezes.

Hand copied last messages seen on console:

Synchronizing SCSI cache for disk sda:
ACPI: PCI Interrupt for device 0000:06:08.0 disabled
Power down.
acpi_power_off called
  hwsleep-0285 [01] enter_sleep_state    : Entering sleep state [S5]

Since you're getting to this point I think this has to be some kind of BIOS interaction causing this. The only thing that happens after the "Entering sleep state" is that the kernel writes to some ACPI registers to tell the hardware to power down. I think some laptop BIOSes do things on ACPI power down like try to park the drive heads, etc. and maybe this change that you found from git bisecting is somehow interfering with it doing this?

Might want to check for a BIOS update first of all..

It would be interesting to try -mm, which includes ACPI support for ATA...

	Jeff



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