linux-kernel - Re: ahci_softreset prevents acpi_power

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 14 Jan 2007 10:06:18 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Faik Uygur <faik@...dus.org.tr>
Cc:	Robert Hancock <hancockr@...w.ca>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Tejun Heo <htejun@...il.com>, Jeff Garzik <jeff@...zik.org>
Subject: Re: ahci_softreset prevents acpi_power_off

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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/