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[190.30.68.179]) by smtp.gmail.com with ESMTPSA id 71dfb90a1353d-5cde5a70282sm3358365e0c.10.2026.09.26.16.19.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 26 Sep 2026 16:19:58 -0700 (PDT) Message-ID: <5ed0ee13-9502-42f1-94b7-a99607ca2bea@gmail.com> Date: Sat, 26 Sep 2026 20:19:55 -0300 Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 6.18 303/398] Input: synaptics - disable InterTouch on ThinkPad T440p (board id 2722) To: Greg Kroah-Hartman , stable@vger.kernel.org Cc: patches@lists.linux.dev, =?UTF-8?Q?Rapha=C3=ABl_Larocque?= , Dmitry Torokhov , linux-input@vger.kernel.org References: <20260923140643.441954610@linuxfoundation.org> <20260923140651.274430576@linuxfoundation.org> Content-Language: en-US From: Daniel Salmun In-Reply-To: <20260923140651.274430576@linuxfoundation.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 9/23/26 11:06, Greg Kroah-Hartman wrote: > 6.18-stable review patch. If anyone has any objections, please let > me know. > > ------------------ > > From: Raphaël Larocque > > commit 26eb3d92c7a4d7adb1ae1740ca6e8e100b11d1ec upstream. > > The Lenovo ThinkPad T440p (PNP ID LEN0036, board id 2722) has a > Synaptics touchpad whose SMBus companion is not ready at boot and > takes roughly 200 seconds to appear. [...] > Disable SMBus InterTouch for board id 2722 so the touchpad and > TrackPoint work immediately via PS/2 from boot. I have a concern about this one. Board id 2722 isn't specific to the T440p. My ThinkPad L440 has the same Synaptics board id, and this patch would move it from SMBus/RMI4 to PS/2. I have never hit the issue this commit fixes, and I haven't seen it reported on other potentially affected models either. I sent a patch [1] that limits the quirk to the T440p. Previous attempts to move these touchpads to PS/2 were rejected [2], as explained in that patch's commit message. Could this be dropped from the stable queue until it's sorted out upstream? [1] https://lore.kernel.org/all/20260925230039.236786-1- salmundani@gmail.com/ [2] https://lore.kernel.org/linux- input/65C23A49-5A55-4CF4-9AFD-2DA504DAABF5@duggan.us/