From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael Frank" Subject: Re: Still problems with ACPI sleep state Date: Sat, 26 Jun 2004 18:26:07 +0800 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: References: <200406251547.21050.mailinglisten@merula.de> <1088172763.1918.1.camel@camel> <20040625211440.P5510@root.org> <20040625232835.R6228@root.org> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; delsp=yes; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20040625232835.R6228-Y6VGUYTwhu0@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Nate Lawson Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org On Fri, 25 Jun 2004 23:30:35 -0700 (PDT), Nate Lawson wro= te: > [context recovered] > On Sat, 26 Jun 2004, Michael Frank wrote: >> On Fri, 25 Jun 2004 21:15:21 -0700 (PDT), Nate Lawson = wrote: >> > On Fri, 25 Jun 2004, Herman Sheremetyev wrote: >> >> Try booting with acpi_sleep=3Ds3_bios, I had the same problem on my= Asus >> >> M6N and that made the LCD come back on after an S3 resume. >> >> >> >> -Herman >> > >> > Could someone familiar with Linux let me know what s3_bios does >> > differently from a normal S3? >> > >> > -Nate >> >> The suspend is performed in the BIOS without OS interaction. >> >> BIOS grabs CPU/its state, suspends devices, saves state, powers down >> and on powerup restores state, resumes devices, releases its state/CPU= . >> >> (more or less) >> >> In short, BIOS does all the work. Used to be like that before ACPI. >> And few systems do it now like that... > > I could use a bit more technical response. For instance, are SLP_TYP_A= /B > written to a different register? If so, which? Does the system > transition to legacy mode (disabling ACPI), trigger APM suspend, then > re-enable ACPI on resume? What caveats are there? > No idea, only the BIOS supplier will know the details... Michael ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com