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Clark" , Hans de Goede , Ilpo =?utf-8?B?SsOkcnZpbmVu?= , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org Subject: Re: [PATCH 1/2] input: atkbd: add softleds quirk for broken EC PS/2 emulation Message-ID: References: <20260628-ideapad-kbd-leds-v1-0-50b421d94927@gmail.com> <20260628-ideapad-kbd-leds-v1-1-50b421d94927@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@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: <20260628-ideapad-kbd-leds-v1-1-50b421d94927@gmail.com> Hi Rodnei, On Sun, Jun 28, 2026 at 10:57:03PM -0300, Rodnei Cilto wrote: > Some Lenovo IdeaPad laptops (e.g. 83RR/83SR, Wildcat Lake) implement > PS/2 keyboard emulation via the Embedded Controller (EC) but do not > fully support the AT protocol. Specifically, sending the SETLEDS > command (0xED) after initialization causes the EC to return corrupted > scancodes (reported as '**' in i8042.debug), rendering the keyboard > non-functional. "**" do not represent corrupted scancodes, they are safety measure to not disclose your password on accident. Use i8042.debug=1 i8042.unmask_kbd_data=1 to unveil real data. Thanks. -- Dmitry