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Fri, 13 Nov 2026 08:00:55 -0800 (PST) Received: from localhost ([2a00:79e0:2ebe:8:48f1:7a0b:9bfb:4205]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-379508762a5sm8587820eec.0.2026.11.13.08.00.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2026 08:00:54 -0800 (PST) Date: Fri, 13 Nov 2026 08:00:53 -0800 Message-ID: <9594e8428a3fbc94e515c9dad2268009@gmail.com> From: Dmitry Torokhov To: Vishal Tyagi Cc: Markus Rathgeb , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH] Revert "Input: synaptics - enable SMBus for HP Elitebook 850 G1" In-Reply-To: <179399405216.85438.8327280593401118083@gmail.com> References: <179399405216.85438.8327280593401118083@gmail.com> X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi Vishal, On Sat, Nov 07, 2026 at 01:10:52AM +0530, Vishal Tyagi wrote: > Commit f04f03d3e99b ("Input: synaptics - enable SMBus for HP Elitebook 850 G1") > added PNP ID "SYN3003" to smbus_pnp_ids[] to enable SMBus/InterTouch mode. > > However, on Haswell-generation HP EliteBooks sharing this touchpad controller > (including HP EliteBook 840 G1 and HP EliteBook 850 G1), the touchpad fails > to resume after ACPI S3 suspend: > > rmi4_smbus 0-002c: failed to get SMBus version number! > rmi4_f01 rmi4-00.fn01: Resume failed with code -6. > rmi4_physical: Failed to resume rmi4-00: -6 Could you please try the patch recently posted by Markus Rathgeb (CCed) that retries reading the SMBus version on -ENXIO during resume, and see if it resolves the S3 resume issue on your EliteBook without reverting SMBus support: https://lore.kernel.org/linux-input/20261105204953.69572-1-maggu2810@mailbox.org/ Thanks. -- Dmitry