Re: ahci_softreset prevents acpi_power_off

From: Faik Uygur
Date: Sun Jan 14 2007 - 13:00:18 EST


14 Oca 2007 Paz 03:23 tarihinde, Robert Hancock ÅunlarÄ yazmÄÅtÄ:
>> [...]
>> > 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..

Checked from the Sony support page for the laptop model and seems the BIOS
version is the latest.

So it is nothing interesting but a broken BIOS.

Regards,
- Faik
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