From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7FBDC623; Tue, 9 Jan 2024 00:00:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="QxRdJ08g" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D8D0FC433F1; Tue, 9 Jan 2024 00:00:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1704758435; bh=bo+EEbnDZ6aEvoH8pDPBhBD6o65eAEZe9b3YzZCPuak=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=QxRdJ08g6H2N5VN9xG4xxeL1z9ezvJZC2Dr3gXCKooQFSNDZdF6qR0VsagAuVwyXM cUOedrIBMyaaT60j+JwAJ4fKxjvqY2UqWSsskHd5fb+8Si9HT+jP/CbS8PZuZs+wLa Qiu+/pjOsFHqZrrfNePML+FcGsS17EP11+HQP50CGVkMbeaw7b0gYG9SFzQvY9FDFK a7ZDZLSoaZK5fkmJVVgojsipB3ewoMWBARS3tYi2PSM0iBpgTGgPlxhCFbHQIGXWaP eyrDV3fD4oD7dNywAa9ZDQotzIClTFv5/jQ7CcsN1EG9yaJqfPb7bIKc+Zdl7I9t6k of6+h/xq9f2/w== Date: Mon, 8 Jan 2024 18:00:33 -0600 From: Bjorn Helgaas To: Armin Wolf Cc: Athul Krishna , "corentin.chary@gmail.com" , "acpi4asus-user@lists.sourceforge.net" , "platform-driver-x86@vger.kernel.org" , linux-pci@vger.kernel.org Subject: Re: ERROR: Writing to dgpu_disable cause Input/Output error Message-ID: <20240109000033.GA1986948@bhelgaas> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Sat, Jan 06, 2024 at 11:33:35PM +0100, Armin Wolf wrote: > Am 04.01.24 um 03:50 schrieb Athul Krishna: > > > > > > > > > > > Sent with Proton Mail secure email. > > > > On Thursday, January 4th, 2024 at 1:05 AM, Armin Wolf wrote: > > > > > > > Am 03.01.24 um 19:51 schrieb Athul Krishna: > > > > > > > Hello, > > > > This is my first time reporting an issue in the kernel. > > > > > > > > Device Details: > > > > > > > > * Asus Zephyrus G14 (||||||GA402RJ) > > > > * Latest BIOS > > > > * Arch_x86_64 > > > > * Kernel: 6.6.9 > > > > * Minimal install using archinstall > > > > > > > > ISSUE: Using /dgpu_disable /provided by _asus-nb-wmi _to disable and > > > > enable dedicated gpu, > > > > causes system crash and reboots, randomly. > > > > 9/10 times writing 0 to dgpu_disable will produce an Input/Output > > > > error, but the value will be changed to 0, half the time system will > > > > crash and reboot. While writing 1 to it doesn't produce an error, I > > > > have observed system crash twice just after that. > > > > > > > > Steps to Reproduce: > > > > > > > > * Remove dpgu: echo 1 | sudo tee ../remove (dgpu path) > > > > * echo 1 | sudo tee /sys/devices/platform/asus-nb-wmi/dgpu_disable > > > > * echo 0 | sudo tee /sys/devices/platform/asus-nb-wmi/dgpu_disable > > > > > > > > * echo 1 | sudo tee /sys/bus/pci/rescan > > > > > > > > After writing 0 to dgpu_disable, there's an entry in journal about an > > > > ACPI bug. > > > > Output of 'journalctl -p 3' and lspci is attached. > > > > > > Hi, > > > > > > Can you share the output of "acpidump" and the content of "/sys/bus/wmi/devices/05901221-D566-11D1-B2F0-00A0C9062910[-X]/bmof"? > > > The bmof files contain a description of the WMI interfaces of your machine, which might be important for diagnosing the error. > > > > > > Thanks, > > > Armin Wolf > > Here's the output of 'acpidump > acpidump.out' and 'cat /sys/bus/wmi/devices/05901221-D566-11D1-B2F0-00A0C9062910[-X]/bmof' > > Ok, it seems the ACPI code tries to access an object ("GC00") which does not exist. > This is the reason why disabling the dGPU fails with -EIO. > > I am unfortunately not that knowledgeable when it comes to PCI problems, i CCed the linux-pci mailing list in hope that > they can better help you in this regard. FWIW, I don't know enough about what's going on here to see a PCI connection. I do see a bunch of PCI-related stuff around rfkill, but I don't think that's involved here. I think the path here is this, which doesn't seem to touch anything in PCI: dgpu_disable_store asus_wmi_set_devstate(ASUS_WMI_DEVID_DGPU, ..., &result) asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, ...) asus_wmi_evaluate_method3 wmi_evaluate_method(ASUS_WMI_MGMT_GUID, ...) if (result > 1) return -EIO But if I missed it, let me know and I'll be happy to take another look. Bjorn