From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: [RFC] Reliable video POSTing on resume (was: Re: Samsung P35, S3, black screen (radeon)) Date: Sat, 5 Feb 2005 10:35:50 +0100 Message-ID: <20050205093550.GC1158@elf.ucw.cz> References: <420217DB.709@gmx.net> <4202A972.1070003@gmx.net> <20050203225410.GB1110@elf.ucw.cz> <1107474198.5727.9.camel@desktop.cunninghams> <4202DF7B.2000506@gmx.net> <1107485504.5727.35.camel@desktop.cunninghams> <9e4733910502032318460f2c0c@mail.gmail.com> <20050204074454.GB1086@elf.ucw.cz> <9e473391050204093837bc50d3@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9e473391050204093837bc50d3-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Jon Smirl Cc: ncunningham-jjFNsPSvq+iXDw4h08c5KA@public.gmane.org, Carl-Daniel Hailfinger , ACPI List , Linux Kernel Mailing List List-Id: linux-acpi@vger.kernel.org Hi! > > We already try to do that, but it hangs on 70% of machines. See > > Documentation/power/video.txt. > > We know that all of these ROMs are run at power on so they have to > work. This implies that there must be something wrong with the > environment the ROM are being run in. Video ROMs make calls into the > INT vectors of the system BIOS. If these haven't been set up yet > running the VBIOS is sure to hang. Has someone with ROM source and > the appropriate debugging tools tried to debug one of these hangs? > Alternatively code could be added to wakeup.S to try and set these up > or dump the ones that are there and see if they are sane. Rumors say that notebooks no longer have video bios at C000h:0; rumors say that video BIOS on notebooks is simply integrated into main system BIOS. I personaly do not know if rumors are true, but PCs are ugly machines.... Pavel -- People were complaining that M$ turns users into beta-testers... ...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl! ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl