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From: Arjan van de Ven <arjan@infradead.org>
To: Faik Uygur <faik@pardus.org.tr>
Cc: Robert Hancock <hancockr@shaw.ca>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Tejun Heo <htejun@gmail.com>, Jeff Garzik <jeff@garzik.org>
Subject: Re: ahci_softreset prevents acpi_power_off
Date: Sun, 14 Jan 2007 10:06:18 -0800	[thread overview]
Message-ID: <1168797978.3123.997.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <200701141959.40673.faik@pardus.org.tr>

On Sun, 2007-01-14 at 19:59 +0200, Faik Uygur wrote:
> 14 Oca 2007 Paz 03:23 tarihinde, Robert Hancock şunları yazmıştı: 
> >> [...]
> >> > 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.

Hi,

I'd be interested in finding out how to best test this; if the bios is
really broken I'd love to add a test to the Linux-ready Firmware
Developer Kit for this, so that BIOS developers can make sure future
bioses do not suffer from this bug...

Greetings,
   Arjan van de Ven

-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com
Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org


  reply	other threads:[~2007-01-14 18:07 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <fa.enjQgtLFPdSkeJjKv6eOjULTovQ@ifi.uio.no>
     [not found] ` <fa.1s/e9SHVR6LQC2HgdZRykrqlV5Q@ifi.uio.no>
     [not found]   ` <fa.kpxGqupQMKJxBBFrktFUzuoKc7c@ifi.uio.no>
2007-01-14  1:23     ` Robert Hancock
2007-01-14  3:18       ` Jeff Garzik
2007-01-14 17:50         ` Faik Uygur
2007-01-14 17:59       ` Faik Uygur
2007-01-14 18:06         ` Arjan van de Ven [this message]
2007-01-14 18:58           ` Faik Uygur
2007-01-15  4:02           ` Tejun Heo
2007-01-15 13:44             ` Jeff Garzik
2007-01-15 13:55               ` Tejun Heo
2007-01-11 10:31 Faik Uygur
2007-01-13  1:12 ` Tejun Heo
2007-01-13  5:59   ` Faik Uygur
2007-01-13 12:10   ` Faik Uygur

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