From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nate Lawson Subject: Re: PNPACPI breaks my asus k6-2 parallel port Date: Tue, 07 Dec 2004 07:40:13 -0800 Message-ID: <41B5CEDD.3070004@root.org> References: <200412070414.NAA01833@axe-inc.co.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200412070414.NAA01833-yzSWc4HAx5xL9jVzuh4AOg@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: Takanori Watanabe Cc: Matthew Wilcox , acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Takanori Watanabe wrote: > In message <20041207022133.GB22171-+pPCBgu9SkPzIGdyhVEDUDl5KyyQGfY2kSSpQ9I8OhVaa/9Udqfwiw@public.gmane.org>, Matthew > Wilcox wrote: > >>Turning on PNPACPI changes this in my dmesg: >> >>-parport0: PC-style at 0x378 [PCSPP(,...)] >>-lp0: using parport0 (polling). >>+ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A >>+ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A >>+parport: PnPBIOS parport detected. >>+parport0: PC-style at 0x378, irq 7 [PCSPP(,...)] >>+lp0: using parport0 (interrupt-driven). >>+pnp: Device 00:08 activated. >>+parport: PnPBIOS parport detected. >>+parport1: PC-style at 0x278, irq 5 [PCSPP(,...)] >>+lp1: using parport1 (interrupt-driven). >> >>As a result, my parallel port stops working. Any more information I can >>provide? > > > I don't know little about Linux specific, but generally, > a Printer port device will appear several times as ACPI devices. > > If you forget to check device status (_STA), > confliction will occur as you got. You are right Watanabe-san. It appears linux just parses all resource sets in _PRS as separate devices instead of parsing the DPFs and treating them as separate sets for a single device. -- Nate ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/