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([2607:f598:b3da:60:e5a8:1520:7d4c:f121]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3607ee0e5e6sm20383250eec.1.2026.10.17.20.03.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 17 Oct 2026 20:03:02 -0700 (PDT) Message-ID: Date: Sat, 17 Oct 2026 20:03:00 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Bozhen Peng Subject: Re: [PATCH] platform/x86: bitland-mifs-wmi: Only expose kb_mode when it is supported To: Anton Karasev Cc: Hans de Goede , Ilpo Jarvinen , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, W_Armin@gmx.de, qby140326@gmail.com, ilya.gladyshev@linux.dev, chris@miget.com, kento@kekto.ru, wolf109909@outlook.com, vlku.milos.fun@gmail.com, btx342@gmail.com, zsanya322@gmail.com, i@rsplwe.com, martiya.ar@gmail.com, nika@nikableh.moe References: <20261008-bitland-kb-mode-v1-uselessfire@gmail.com> Content-Language: en-US In-Reply-To: <20261008-bitland-kb-mode-v1-uselessfire@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Anton, I tested your patch as posted on my MECHREVO WUJIE15 PRO (WUJIE15 Series-HPT), using your stated for-next base: 98f039265e580291d5e76a11b2072541fbb1c393 I booted the baseline and then the same kernel with only your patch applied. On the baseline, kb_mode was present, but reading it returned "Input/output error". With your patch, kb_mode was absent and I got: kb_mode not supported (-5), hiding it The GET produces an ACPI AE_NOT_FOUND for HEC.LEDM on this machine. With your patch, the probe still reports the ACPI error, but kb_mode is correctly hidden. I cycled the keyboard backlight with Fn+F7 from off through levels 1, 2 and 3, then back to off. All levels worked. During this check, atkbd logged unknown scancode 0xf6 messages. This confirms the unsupported-kb_mode case on HPT. My keyboard backlight is not RGB, so I didn't tested the supported RGB-mode case. Tested-by: Bozhen Peng Thanks, Bozhen