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SubjectRe: ahci_softreset prevents acpi_power_off
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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