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Sun, 01 Nov 2026 07:35:33 -0800 (PST) Received: from eggarch ([2409:40c4:3155:12c1:3d44:70f1:8a00:15db]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1ac13ef1d4dsm23714560c88.3.2026.11.01.07.35.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Nov 2026 07:35:32 -0800 (PST) Date: Sun, 1 Nov 2026 21:05:27 +0530 From: Lovekesh Solanki To: Eduardo Henrique Teixeira Cc: linux-input@vger.kernel.org, dmitry.torokhov@gmail.com Subject: Re: [BUG] ThinkPad T490 Synaptics TM3471-020 input lag and missed taps with SMBus/RMI4 Message-ID: References: X-Mailing-List: linux-input@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=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Hi thanks for the report, On Fri, Oct 30, 2026 at 06:10:50PM -0700, Eduardo Henrique Teixeira wrote: > Potentially related upstream change: > > Commit a961417c5ae77bbb728a23d9577ecd8f4d8a4b5a > > “Input: synaptics - add LEN205b entry to smbus_pnp_ids for ThinkPad T490” > > https://lkml.iu.edu/2609.2/11883.html This was only added because the original reporter confirmed Intertouch worked well on their device. You said it happens more frequently while charging, so I wonder if PM is involved. Could you try reproducing after warm and cold boots? And also with disabling runtime PM for the device? Regards, Lovekesh